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Mustafa Tuzen - One of the best experts on this subject based on the ideXlab platform.

  • equilibrium thermodynamic and kinetic investigations on Biosorption of arsenic from aqueous solution by algae maugeotia genuflexa biomass
    Chemical Engineering Journal, 2011
    Co-Authors: Ahmet Sari, Ozgur Dogan Uluozlu, Mustafa Tuzen
    Abstract:

    Abstract This study is focused on the investigation of the equilibrium, thermodynamics and kinetics of arsenic(III) Biosorption from aqueous solution by dead green algae ( Maugeotia genuflexa ) biomass. Optimum biosorptin conditions were determined under the optimum pH, biomass concentration, contact time, and temperature. The equilibrium data were applied to the Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models. From the Langmuir model, the maximum monolayer Biosorption capacity of the biosorbent was found to be 57.48 mg/g at pH 6, biomass concentration 4 g/L, contact time 60 min, and temperature 20 °C. The calculated mean Biosorption energy (10.2 kJ/mol) using D–R model indicated that the Biosorption process was carried out via chemical ion-exchange. Biosorbent could be regenerated using 0.5 M HCI solution, with up to 96% recovery and permitted a slightly decrease about 20% in recovery of As(III) ions after repeated ten times sorption–desorption processes. Thermodynamic parameters showed that the Biosorption of As(III) onto algal biomass was feasible, spontaneous and exothermic under studied conditions. Kinetic results indicated that the pseudo-second-order kinetic model was well fitted to the experimental data. The performance of the algal biosorbent was also compared with that of many other reported sorbents for arsenic removal and it was observed that the proposed biosorbent is effective in terms of its high sorption capacity.

  • equilibrium thermodynamic and kinetic studies on aluminum Biosorption from aqueous solution by brown algae padina pavonica biomass
    Journal of Hazardous Materials, 2009
    Co-Authors: Ahmet Sari, Mustafa Tuzen
    Abstract:

    Abstract This paper presents the equilibrium, thermodynamic and kinetic studies on aluminum Biosorption from aqueous solution by brown algae (Padina pavonica) biomass. Optimum Biosorption conditions were determined as a function of pH, biomass dosage, contact time, and temperature. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) models were applied to describe the Biosorption isotherm of Al(III) by P. pavonica biomass. The Biosorption capacity of P. pavonica biomass was found as 77.3 mg/g. The metal ions were desorbed from P. pavonica using 1 M HCl. The high stability of P. pavonica permitted a slight decrease about 20% in the recovery of Al(III) ions after 10 times of adsorption–elution process. The mean free energy value evaluated from the D–R model indicated that the Biosorption of Al(III) onto P. pavonica biomass was taken place by chemical ion exchange. The calculated thermodynamic parameters, ΔG°, ΔH° and ΔS° showed that the Biosorption of Al(III) onto P. pavonica biomass was feasible, spontaneous and endothermic under examined conditions. Experimental data was also tested in terms of Biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the Biosorption processes of Al(III) onto P. pavonica biomass followed well pseudo-second-order kinetics.

  • Biosorption of palladium ii from aqueous solution by moss racomitrium lanuginosum biomass equilibrium kinetic and thermodynamic studies
    Journal of Hazardous Materials, 2009
    Co-Authors: Ahmet Sari, Mustafa Tuzen, Durali Mendil, Mustafa Soylak
    Abstract:

    Abstract The Biosorption potential of Racomitrium lanuginosum as aquatic moss biosorbent for the removal of Pd(II) from aqueous solution was investigated. The effects of pH, biomass dosage, contact time, and temperature on the Biosorption processes were systematically studied. Experimental data were modeled by Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherms. Langmuir isotherm model ( R 2  = 0.994) fitted the equilibrium data better than the Freundlich isotherm model ( R 2  = 0.935). The monolayer Biosorption capacity of R. lanuginosum biomass for Pd(II) was found to be 37.2 mg/g at pH 5. The mean free energy was calculated as 9.2 kJ/mol using the D–R isotherm model ( R 2  = 0.996). This result indicated that the Biosorption of Pd(II) was taken place by chemical ion-exchange. The calculated thermodynamic parameters, Δ G °, Δ H ° and Δ S ° showed that the Biosorption of Pd(II) on R. lanuginosum biomass was feasible, spontaneous and exothermic under examined conditions. Experimental data were also tested using the Biosorption kinetic models. The results showed that the Biosorption processes of Pd(II) on R. lanuginosum followed well pseudo-second-order kinetics at 20–50 °C ( R 2  = 0.999).

  • Biosorption of cd ii and cr iii from aqueous solution by moss hylocomium splendens biomass equilibrium kinetic and thermodynamic studies
    Chemical Engineering Journal, 2008
    Co-Authors: Ahmet Sari, Mustafa Tuzen, Durali Mendil, Mustafa Soylak
    Abstract:

    Abstract The Biosorption characteristics of Cd(II) and Cr(III) ions from aqueous solution using the moss (Hylocomium splendens) biomass were investigated in terms of equilibrium, kinetics and thermodynamics. Optimum Biosorption conditions were determined as a function of pH, biomass dosage, contact time, and temperature. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) models were applied to describe the Biosorption isotherm of the metal ions by H. splendens biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The maximum Biosorption capacity (qm) of H. splendens biomass was found to be 32.5 mg/g for Cd(II) ion and 42.1 mg/g for Cr(III) ion. The mean free energy values evaluated from the D–R model indicated that the Biosorption of Cd(II) and Cr(III) onto H. splendens biomass was taken place by chemical ion-exchange. The calculated thermodynamic parameters, ΔG°, ΔH° and ΔS° showed that the Biosorption of Cd(II) and Cr(III) ions onto H. splendens biomass was feasible, spontaneous and exothermic under examined conditions. Experimental data were also tested in terms of Biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the Biosorption processes of both metal ions followed well pseudo-second-order kinetics.

  • Biosorption of cadmium ii from aqueous solution by red algae ceramium virgatum equilibrium kinetic and thermodynamic studies
    Journal of Hazardous Materials, 2008
    Co-Authors: Ahmet Sari, Mustafa Tuzen
    Abstract:

    The Biosorption characteristics of Cd(II) ions using the red alga (Ceramium virgatum) were investigated. Experimental parameters affecting the Biosorption process such as pH, contact time, biomass dosage and temperature were studied. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were applied to describe the Biosorption isotherms. The Biosorption capacity of C. virgatum biomass for Cd(II) ions was found to be 39.7 mg/g. From the D-R isotherm model, the mean free energy was calculated as 12.7 kJ/mol, indicating that the Biosorption of Cd(II) the metal ions was taken place by chemisorption. The calculated thermodynamic parameters (DeltaG degrees , DeltaH degrees and DeltaS degrees ) showed that the Biosorption of Cd(II) ions onto C. virgatum was feasible, spontaneous and exothermic at 293-323 K. Evaluation of experimental data in terms of Biosorption kinetics showed that the Biosorption of Cd(II) C. virgatum followed well pseudo-second-order kinetics.

Ahmet Sari - One of the best experts on this subject based on the ideXlab platform.

  • equilibrium thermodynamic and kinetic investigations on Biosorption of arsenic from aqueous solution by algae maugeotia genuflexa biomass
    Chemical Engineering Journal, 2011
    Co-Authors: Ahmet Sari, Ozgur Dogan Uluozlu, Mustafa Tuzen
    Abstract:

    Abstract This study is focused on the investigation of the equilibrium, thermodynamics and kinetics of arsenic(III) Biosorption from aqueous solution by dead green algae ( Maugeotia genuflexa ) biomass. Optimum biosorptin conditions were determined under the optimum pH, biomass concentration, contact time, and temperature. The equilibrium data were applied to the Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models. From the Langmuir model, the maximum monolayer Biosorption capacity of the biosorbent was found to be 57.48 mg/g at pH 6, biomass concentration 4 g/L, contact time 60 min, and temperature 20 °C. The calculated mean Biosorption energy (10.2 kJ/mol) using D–R model indicated that the Biosorption process was carried out via chemical ion-exchange. Biosorbent could be regenerated using 0.5 M HCI solution, with up to 96% recovery and permitted a slightly decrease about 20% in recovery of As(III) ions after repeated ten times sorption–desorption processes. Thermodynamic parameters showed that the Biosorption of As(III) onto algal biomass was feasible, spontaneous and exothermic under studied conditions. Kinetic results indicated that the pseudo-second-order kinetic model was well fitted to the experimental data. The performance of the algal biosorbent was also compared with that of many other reported sorbents for arsenic removal and it was observed that the proposed biosorbent is effective in terms of its high sorption capacity.

  • equilibrium thermodynamic and kinetic studies on aluminum Biosorption from aqueous solution by brown algae padina pavonica biomass
    Journal of Hazardous Materials, 2009
    Co-Authors: Ahmet Sari, Mustafa Tuzen
    Abstract:

    Abstract This paper presents the equilibrium, thermodynamic and kinetic studies on aluminum Biosorption from aqueous solution by brown algae (Padina pavonica) biomass. Optimum Biosorption conditions were determined as a function of pH, biomass dosage, contact time, and temperature. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) models were applied to describe the Biosorption isotherm of Al(III) by P. pavonica biomass. The Biosorption capacity of P. pavonica biomass was found as 77.3 mg/g. The metal ions were desorbed from P. pavonica using 1 M HCl. The high stability of P. pavonica permitted a slight decrease about 20% in the recovery of Al(III) ions after 10 times of adsorption–elution process. The mean free energy value evaluated from the D–R model indicated that the Biosorption of Al(III) onto P. pavonica biomass was taken place by chemical ion exchange. The calculated thermodynamic parameters, ΔG°, ΔH° and ΔS° showed that the Biosorption of Al(III) onto P. pavonica biomass was feasible, spontaneous and endothermic under examined conditions. Experimental data was also tested in terms of Biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the Biosorption processes of Al(III) onto P. pavonica biomass followed well pseudo-second-order kinetics.

  • Biosorption of palladium ii from aqueous solution by moss racomitrium lanuginosum biomass equilibrium kinetic and thermodynamic studies
    Journal of Hazardous Materials, 2009
    Co-Authors: Ahmet Sari, Mustafa Tuzen, Durali Mendil, Mustafa Soylak
    Abstract:

    Abstract The Biosorption potential of Racomitrium lanuginosum as aquatic moss biosorbent for the removal of Pd(II) from aqueous solution was investigated. The effects of pH, biomass dosage, contact time, and temperature on the Biosorption processes were systematically studied. Experimental data were modeled by Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherms. Langmuir isotherm model ( R 2  = 0.994) fitted the equilibrium data better than the Freundlich isotherm model ( R 2  = 0.935). The monolayer Biosorption capacity of R. lanuginosum biomass for Pd(II) was found to be 37.2 mg/g at pH 5. The mean free energy was calculated as 9.2 kJ/mol using the D–R isotherm model ( R 2  = 0.996). This result indicated that the Biosorption of Pd(II) was taken place by chemical ion-exchange. The calculated thermodynamic parameters, Δ G °, Δ H ° and Δ S ° showed that the Biosorption of Pd(II) on R. lanuginosum biomass was feasible, spontaneous and exothermic under examined conditions. Experimental data were also tested using the Biosorption kinetic models. The results showed that the Biosorption processes of Pd(II) on R. lanuginosum followed well pseudo-second-order kinetics at 20–50 °C ( R 2  = 0.999).

  • Biosorption of cd ii and cr iii from aqueous solution by moss hylocomium splendens biomass equilibrium kinetic and thermodynamic studies
    Chemical Engineering Journal, 2008
    Co-Authors: Ahmet Sari, Mustafa Tuzen, Durali Mendil, Mustafa Soylak
    Abstract:

    Abstract The Biosorption characteristics of Cd(II) and Cr(III) ions from aqueous solution using the moss (Hylocomium splendens) biomass were investigated in terms of equilibrium, kinetics and thermodynamics. Optimum Biosorption conditions were determined as a function of pH, biomass dosage, contact time, and temperature. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) models were applied to describe the Biosorption isotherm of the metal ions by H. splendens biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The maximum Biosorption capacity (qm) of H. splendens biomass was found to be 32.5 mg/g for Cd(II) ion and 42.1 mg/g for Cr(III) ion. The mean free energy values evaluated from the D–R model indicated that the Biosorption of Cd(II) and Cr(III) onto H. splendens biomass was taken place by chemical ion-exchange. The calculated thermodynamic parameters, ΔG°, ΔH° and ΔS° showed that the Biosorption of Cd(II) and Cr(III) ions onto H. splendens biomass was feasible, spontaneous and exothermic under examined conditions. Experimental data were also tested in terms of Biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the Biosorption processes of both metal ions followed well pseudo-second-order kinetics.

  • Biosorption of cadmium ii from aqueous solution by red algae ceramium virgatum equilibrium kinetic and thermodynamic studies
    Journal of Hazardous Materials, 2008
    Co-Authors: Ahmet Sari, Mustafa Tuzen
    Abstract:

    The Biosorption characteristics of Cd(II) ions using the red alga (Ceramium virgatum) were investigated. Experimental parameters affecting the Biosorption process such as pH, contact time, biomass dosage and temperature were studied. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were applied to describe the Biosorption isotherms. The Biosorption capacity of C. virgatum biomass for Cd(II) ions was found to be 39.7 mg/g. From the D-R isotherm model, the mean free energy was calculated as 12.7 kJ/mol, indicating that the Biosorption of Cd(II) the metal ions was taken place by chemisorption. The calculated thermodynamic parameters (DeltaG degrees , DeltaH degrees and DeltaS degrees ) showed that the Biosorption of Cd(II) ions onto C. virgatum was feasible, spontaneous and exothermic at 293-323 K. Evaluation of experimental data in terms of Biosorption kinetics showed that the Biosorption of Cd(II) C. virgatum followed well pseudo-second-order kinetics.

Yakup M Arica - One of the best experts on this subject based on the ideXlab platform.

  • preparation of a composite biosorbent using scenedesmus quadricauda biomass and alginate polyvinyl alcohol for removal of cu ii and cd ii ions isotherms kinetics and thermodynamic studies
    Water Air and Soil Pollution, 2011
    Co-Authors: Gulay Bayramoglu, Yakup M Arica
    Abstract:

    In this study, microalgae Scenedesmus quadricauda was entrapped in calcium alginate/polyvinyl alcohol composite hydrogel beads by phase-inversion techniques. The composite biosorbents were used for removal of Cu(II) and Cd(II) ions from single component and binary systems using cell-free composite beads as a control system. The effects of the experimental conditions (such as pH, initial metal ions concentrations, temperatures, contact time, and biosorbent concentrations) on Cu(II) and Cd(II) removal efficiencies were studied. The maximum metal ions on the bare and algal biomass immobilized in alginate beads were observed between pH 5.0 and 6.0. The Biosorption of metal ions by the bare and composite beads increased as the initial concentration of the metal ions increased in the medium. The Biosorption of Cu(II) and Cd(II) on the composite beads appears to be slightly temperature dependent. The maximum Biosorptions of metal ions onto microalgae entrapped in composite beads were 0.970 ± 0.028 and 0.682 ± 0.017 mmol/g for Cu(II) and Cd(II) ions, respectively. The equilibrium experimental data for two metallic species fitted well by the Langmuir model. The values of ΔG° at all temperatures are negative, indicating the spontaneous nature of the Biosorption process. When the metal ions competed (in the case of the Biosorption from their mixture), the amounts of Biosorption onto microalgae cells entrapped in beads were 0.857 ± 0.033 mmol/g for Cu(II) and 0.593 ± 0.024 mmol/g for Cd(II). Under noncompetitive and competitive conditions, the affinity order of ions for biosorbents was Cu(II) > Cd(II).

  • equilibrium and kinetic studies on Biosorption of hg ii cd ii and pb ii ions onto microalgae chlamydomonas reinhardtii
    Journal of Environmental Management, 2005
    Co-Authors: Ilhami Tuzun, Gulay Bayramoglu, Emine Yalcin, Gokben Basaran, Gokce Celik, Yakup M Arica
    Abstract:

    Abstract The microalgae Chlamydomonas reinhardtii was used for the Biosorption of Hg(II), Cd(II) and Pb(II) ions. The maximum adsorption of Hg(II) and Cd(II) ions on Chlamydomonas reinhardtii biomass was observed at pH 6.0 and the corresponding value for Pb(II) ions was 5.0. The Biosorption of Hg(II), Cd(II) and Pb(II) ions by microalgae biomass increased as the initial concentration of Hg(II), Cd(II) and Pb(II) ions increased in the Biosorption medium. The maximum Biosorption capacities of microalgae for Hg(II), Cd(II) and Pb(II) ions were 72.2±0.67, 42.6±0.54 and 96.3±0.86 mg/g dry biomass, respectively. The affinity order for algal biomass was Pb(II)>Hg(II)>Cd(II). FT-IR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which were responsible for Biosorption of metal ions. Biosorption equilibrium was established in about 60 min and the equilibrium was well described by the Freundlich Biosorption isotherms. Temperature change in the range of 5–35 °C did not affect the Biosorption capacity. The microalgae could be regenerated using 0.1 M HCl, with up to 98% recovery, which allowed the reuse of the biomass in six Biosorption–desorption cycles without any considerable loss of Biosorption capacity.

  • equilibrium and kinetic studies on Biosorption of hg ii cd ii and pb ii ions onto microalgae chlamydomonas reinhardtii
    Journal of Environmental Management, 2005
    Co-Authors: Ilhami Tuzun, Gulay Bayramoglu, Emine Yalcin, Gokben Basaran, Gokce Celik, Yakup M Arica
    Abstract:

    The microalgae Chlamydomonas reinhardtii was used for the Biosorption of Hg(II), Cd(II) and Pb(II) ions. The maximum adsorption of Hg(II) and Cd(II) ions on Chlamydomonas reinhardtii biomass was observed at pH 6.0 and the corresponding value for Pb(II) ions was 5.0. The Biosorption of Hg(II), Cd(II) and Pb(II) ions by microalgae biomass increased as the initial concentration of Hg(II), Cd(II) and Pb(II) ions increased in the Biosorption medium. The maximum Biosorption capacities of microalgae for Hg(II), Cd(II) and Pb(II) ions were 72.2+/-0.67, 42.6+/-0.54 and 96.3+/-0.86 mg/g dry biomass, respectively. The affinity order for algal biomass was Pb(II)>Hg(II)>Cd(II). FT-IR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which were responsible for Biosorption of metal ions. Biosorption equilibrium was established in about 60 min and the equilibrium was well described by the Freundlich Biosorption isotherms. Temperature change in the range of 5-35 degrees C did not affect the Biosorption capacity. The microalgae could be regenerated using 0.1 M HCl, with up to 98% recovery, which allowed the reuse of the biomass in six Biosorption-desorption cycles without any considerable loss of Biosorption capacity.

  • cr vi Biosorption from aqueous solutions using free and immobilized biomass of lentinus sajor caju preparation and kinetic characterization
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2005
    Co-Authors: Yakup M Arica, Gulay Bayramoglu
    Abstract:

    Abstract The potential use of the free and immobilized mycelia (in carboxymethylcellulose (CMC)) of Lentinus sajor-caju to remove hexavalent form of chromium ions, Cr(VI), from aqueous solutions was evaluated using CMC bead as a control system for immobilised form of fungus. The CMC beads containing immobilized fungus mycelia were incubated for the uniform growth on the beads surface at 30 °C for 3 days. Effects of pH, Biosorption time, initial concentration and biosorbent dosages on the Biosorption of Cr(VI) ions were studied. The Biosorption of Cr(VI) ions on the biosorbents showed a highest value at around pH 2.0. The Biosorption of Cr(VI) ions on both free and immobilized L. sajor-caju biomass (mg/g) was increased as the initial concentration of Cr(VI) ions increased in the medium. Biosorption equilibrium was established in about 2.0 h. The determined maximum Biosorption capacities of the free and immobilized fungus were 18.9 and 32.2 mg/g dry weight, respectively. The Biosorption equilibrium was also represented with Langmuir and Freundlich adsorption isotherms. The Biosorption of Cr(VI) on these biomasses follows pseudo-second-order kinetics. The temperature change in the range of 5–40 °C affected the Biosorption capacities of the biosorbents. The biosorbent systems can be regenerated using 0.1 M NaOH, with more than 95% recovery, the biosorbents reused in five Biosorption–desorption cycles without any considerable loss in the Biosorption capacity.

  • entrapment of lentinus sajor caju into ca alginate gel beads for removal of cd ii ions from aqueous solution preparation and Biosorption kinetics analysis
    Microchemical Journal, 2002
    Co-Authors: Gulay Bayramoglu, Adil Denizli, Sema Bektas, Yakup M Arica
    Abstract:

    Abstract A white rot fungus species Lentinus sajor-caju biomass was entrapped into alginate gel via a liquid curing method in the presence of Ca(II) ions. The Biosorption of cadmium(II) by the entrapped live and dead fungal biomass has been studied in a batch system. The heat-treatment process enhanced the Biosorption capacity of the immobilized fungal biomass. The effect of initial cadmium concentration, pH and temperature on cadmium removal has been investigated. The maximum experimental Biosorption capacities for entrapped live and dead fungal mycelia of L. sajur-caju were found to be 104.8±2.7 mg Cd(II) g −1 and 123.5±4.3 mg Cd(II) g −1 , respectively. The kinetics of cadmium Biosorption was fast, approximately 85% of Biosorption taking place within 30 min. The Biosorption equilibrium was well described by Langmuir and Freundlich adsorption isotherms. The change in the Biosorption capacity with time is found to fit pseudo-second-order equations. Cadmium binding properties of entrapped fungal preparations have been determined applying the Ruzic equations. Since the Biosorption capacities are relatively high for both entrapped live and dead forms, they could be considered as suitable biosorbents for the removal of cadmium in wastewater treatment systems. The biosorbents were reused in three consecutive adsorption/desorption cycles without significant loss in the Biosorption capacity.

Tamer Akar - One of the best experts on this subject based on the ideXlab platform.

  • Utilization of Thamnidium elegans fungal culture in environmental cleanup: A reactive dye Biosorption study
    Ecological Engineering, 2013
    Co-Authors: Tamer Akar, Sercan Arslan, Sibel Tunali Akar
    Abstract:

    Abstract In this study, the potential of biomaterial obtained from filamentous fungi, Thamnidium elegans was investigated for the batch and dynamic flow mode Biosorption of Reactive Red 198 (RR198). The effects of pH, biosorbent amount, contact time, initial dye concentration and ionic strength were evaluated in addition to the investigation of its Biosorption performance in the presence of other dyes in the Biosorption medium. High Biosorption yields were recorded by using small amount of biosorbent in a relatively short time. The Biosorption process followed by the pseudo-second-order kinetic and the Langmuir isotherm models. Maximum monolayer dye Biosorption capacity of biosorbent was found as 234.24 mg g−1 in batch conditions. Biosorption–desorption studies indicated that T. elegans has relatively good regeneration ability. Also the suggested biomaterial exhibited high Biosorption yield in competitive and real wastewater conditions. The dye removal mechanism was evaluated by IR, SEM and zeta potential analysis. Overall, batch and dynamic-flow mode studies indicated that this environmentally friendly biosorbent may be an alternative for the removal of reactive dyes from contaminated media.

  • Biosorption potential of the waste biomaterial obtained from cucumis melo for the removal of pb2 ions from aqueous media equilibrium kinetic thermodynamic and mechanism analysis
    Chemical Engineering Journal, 2012
    Co-Authors: Sibel Tunali Akar, Sercan Arslan, Derya Arslan, Tamer Akar
    Abstract:

    Abstract The potential use of a waste biosorbent material obtained from Cucumis melo ( C. melo ) for the removal of Pb 2+ ions from aqueous solutions was investigated by considering equilibrium and kinetic aspects. The Biosorption showed a pH dependent profile. An increase in biosorbent dosage up to 1.8 g L −1 caused an increase in the Biosorption yield of the biosorbent. The relatively fast Biosorption at all studied temperatures follows the pseudo-second-order kinetic model. Biosorption isotherm modeling shows the equilibrium data fitted to the Langmuir model with a maximum monolayer Biosorption capacity of 3.64 × 10 −4  mol g −1 . The thermodynamic parameters indicated the Biosorption of Pb 2+ on the biomass was a spontaneous and endothermic process. Experiments conducted with multi-metal system demonstrated that the presence of co-ions slightly reduced the Pb 2+ Biosorption capacity of the biomass. The possible Pb 2+ ion-biomaterial interactions were evaluated by the zeta potential, FTIR, SEM and EDX analysis. Results of this work showed the suggested biosorbent could be an effective and eco-friendly alternative for the removal of Pb 2+ ions from contaminated solutions.

  • Biosorption performance of surface modified biomass obtained from pyracantha coccinea for the decolorization of dye contaminated solutions
    Chemical Engineering Journal, 2010
    Co-Authors: Tamer Akar, Sema Celik, Sibel Tunali Akar
    Abstract:

    Abstract The present research provides information on the dye Biosorption potential of chemically modified non-conventional biomass obtained from Pyracantha coccinea . A cationic surfactant hegzadecylethyldimethylammonium bromide (HDEDMABr) was used as modification agent. Dye Biosorption characteristics of modified biomass were explored by batch mode equilibrium studies, zeta potential measurements and FTIR studies. When compared with the dried natural biomass, modified biomass was found to have high Biosorption yield for Acid Red 44 (AR44) dye. Kinetic measurements revealed that the Biosorption equilibrium was established in about 40 min of contact time. The Biosorption process could be explained by the pseudo-second-order kinetic model and also followed the intraparticle diffusion model up to 40 min, but diffusion is not the only rate controlling step. A comparison of the different isotherms indicated that the dye Biosorption by using modified biomass was well described by the Langmuir isotherm model with maximum monolayer capacity of 105.0 mg dye g −1 biosorbent. Calculated thermodynamic parameters of Biosorption indicated the exothermic and spontaneous process. Good Biosorption yields ranged from 73.32 to 87.44% were obtained in the presence of the different concentrations of salt in the Biosorption medium. Our results revealed that this developed biomass system may be useful for the decolorization of reactive dye contaminated solutions.

  • assessment of cationic dye Biosorption characteristics of untreated and non conventional biomass pyracantha coccinea berries
    Journal of Hazardous Materials, 2009
    Co-Authors: Tamer Akar, Asli Gorgulu, Burcu Anilan, Sibel Tunali Akar
    Abstract:

    This work reports on the assessment of the dye methylene blue Biosorption properties of Pyracantha coccinea berries under different experimental conditions. Equilibrium and kinetic studies were carried out to determine the Biosorption capacity and rate constants. The highest Biosorption yield was observed at about pH 6.0, while the Biosorption capacity of the biomass decreased with decreasing initial pH values. Batch equilibrium data obtained at different temperatures (15, 25, 35 and 45 degrees C) were modeled by Freundlich, Langmuir and Dubinin-Radushkevich (D-R) isotherms. Langmuir isotherm model fitted the equilibrium data, at the all studied temperatures, better than the other isotherm models indicating monolayer dye Biosorption process. The highest monolayer Biosorption capacity was found to be 127.50mg/g dry biomass at 45 degrees C. Kinetic studies indicate that the Biosorption process followed the pseudo-second-order model, rather than the pseudo-first-order model. DeltaG degrees , DeltaH degrees and DeltaS degrees parameters of Biosorption show that the process is spontaneous and endothermic in nature. The biosorbent-dye interaction mechanisms were investigated using a combination of Fourier transform infrared spectroscopy and scanning electron microscopy. The Biosorption procedure was applied to simulated wastewater including several pollutants. The results obtained indicated that the suggested inexpensive and readily available biomaterial has a good potential for the biosorptive removal of basic dye.

  • Biosorption of reactive blue 49 dye under batch and continuous mode using a mixed biosorbent of macro fungus agaricus bisporus and thuja orientalis cones
    Chemical Engineering Journal, 2009
    Co-Authors: Sibel Tunali Akar, Asli Gorgulu, Zerrin Kaynak, Burcu Anilan, Tamer Akar
    Abstract:

    Abstract A biosorbent was developed by mixing the macro-fungus Agaricus bisporus and Thuja orientalis cones and successfully used for the Biosorption of Reactive Blue 49 (RB49) dye. The biosorbent system was evaluated in batch and continuous Biosorption process. A series of batch studies was carried out to identify the optimum Biosorption conditions such as pH, biosorbent dosage and equilibrium time. The Biosorption process followed the pseudo-first-order and the pseudo-second-order kinetic models and the Freundlich, Langmuir and Dubinin–Radushkevich (D–R) isotherm models at different temperatures. The maximum Biosorption capacity of the mixed biomass system was 1.85 × 10 −4  mol g −1 at 45 °C. The negative Δ G ° values and the positive Δ H ° values indicated that the Biosorption process was spontaneous and endothermic. The dynamic flow Biosorption potential of the biomass system was investigated as a function of the flow rate, column size and inlet solute concentration. FTIR and SEM analysis were used to characterize the biosorbent and Biosorption mechanism. The functional groups such as carboxyl, amine, amide and hydroxyl on the biosorbent surface may be responsible for RB49 Biosorption. In combination, our results suggest that this eco-friendly and economical biomass system may be useful for the removal of contaminating reactive dyes.

Gulay Bayramoglu - One of the best experts on this subject based on the ideXlab platform.

  • preparation of a composite biosorbent using scenedesmus quadricauda biomass and alginate polyvinyl alcohol for removal of cu ii and cd ii ions isotherms kinetics and thermodynamic studies
    Water Air and Soil Pollution, 2011
    Co-Authors: Gulay Bayramoglu, Yakup M Arica
    Abstract:

    In this study, microalgae Scenedesmus quadricauda was entrapped in calcium alginate/polyvinyl alcohol composite hydrogel beads by phase-inversion techniques. The composite biosorbents were used for removal of Cu(II) and Cd(II) ions from single component and binary systems using cell-free composite beads as a control system. The effects of the experimental conditions (such as pH, initial metal ions concentrations, temperatures, contact time, and biosorbent concentrations) on Cu(II) and Cd(II) removal efficiencies were studied. The maximum metal ions on the bare and algal biomass immobilized in alginate beads were observed between pH 5.0 and 6.0. The Biosorption of metal ions by the bare and composite beads increased as the initial concentration of the metal ions increased in the medium. The Biosorption of Cu(II) and Cd(II) on the composite beads appears to be slightly temperature dependent. The maximum Biosorptions of metal ions onto microalgae entrapped in composite beads were 0.970 ± 0.028 and 0.682 ± 0.017 mmol/g for Cu(II) and Cd(II) ions, respectively. The equilibrium experimental data for two metallic species fitted well by the Langmuir model. The values of ΔG° at all temperatures are negative, indicating the spontaneous nature of the Biosorption process. When the metal ions competed (in the case of the Biosorption from their mixture), the amounts of Biosorption onto microalgae cells entrapped in beads were 0.857 ± 0.033 mmol/g for Cu(II) and 0.593 ± 0.024 mmol/g for Cd(II). Under noncompetitive and competitive conditions, the affinity order of ions for biosorbents was Cu(II) > Cd(II).

  • equilibrium and kinetic studies on Biosorption of hg ii cd ii and pb ii ions onto microalgae chlamydomonas reinhardtii
    Journal of Environmental Management, 2005
    Co-Authors: Ilhami Tuzun, Gulay Bayramoglu, Emine Yalcin, Gokben Basaran, Gokce Celik, Yakup M Arica
    Abstract:

    Abstract The microalgae Chlamydomonas reinhardtii was used for the Biosorption of Hg(II), Cd(II) and Pb(II) ions. The maximum adsorption of Hg(II) and Cd(II) ions on Chlamydomonas reinhardtii biomass was observed at pH 6.0 and the corresponding value for Pb(II) ions was 5.0. The Biosorption of Hg(II), Cd(II) and Pb(II) ions by microalgae biomass increased as the initial concentration of Hg(II), Cd(II) and Pb(II) ions increased in the Biosorption medium. The maximum Biosorption capacities of microalgae for Hg(II), Cd(II) and Pb(II) ions were 72.2±0.67, 42.6±0.54 and 96.3±0.86 mg/g dry biomass, respectively. The affinity order for algal biomass was Pb(II)>Hg(II)>Cd(II). FT-IR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which were responsible for Biosorption of metal ions. Biosorption equilibrium was established in about 60 min and the equilibrium was well described by the Freundlich Biosorption isotherms. Temperature change in the range of 5–35 °C did not affect the Biosorption capacity. The microalgae could be regenerated using 0.1 M HCl, with up to 98% recovery, which allowed the reuse of the biomass in six Biosorption–desorption cycles without any considerable loss of Biosorption capacity.

  • equilibrium and kinetic studies on Biosorption of hg ii cd ii and pb ii ions onto microalgae chlamydomonas reinhardtii
    Journal of Environmental Management, 2005
    Co-Authors: Ilhami Tuzun, Gulay Bayramoglu, Emine Yalcin, Gokben Basaran, Gokce Celik, Yakup M Arica
    Abstract:

    The microalgae Chlamydomonas reinhardtii was used for the Biosorption of Hg(II), Cd(II) and Pb(II) ions. The maximum adsorption of Hg(II) and Cd(II) ions on Chlamydomonas reinhardtii biomass was observed at pH 6.0 and the corresponding value for Pb(II) ions was 5.0. The Biosorption of Hg(II), Cd(II) and Pb(II) ions by microalgae biomass increased as the initial concentration of Hg(II), Cd(II) and Pb(II) ions increased in the Biosorption medium. The maximum Biosorption capacities of microalgae for Hg(II), Cd(II) and Pb(II) ions were 72.2+/-0.67, 42.6+/-0.54 and 96.3+/-0.86 mg/g dry biomass, respectively. The affinity order for algal biomass was Pb(II)>Hg(II)>Cd(II). FT-IR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which were responsible for Biosorption of metal ions. Biosorption equilibrium was established in about 60 min and the equilibrium was well described by the Freundlich Biosorption isotherms. Temperature change in the range of 5-35 degrees C did not affect the Biosorption capacity. The microalgae could be regenerated using 0.1 M HCl, with up to 98% recovery, which allowed the reuse of the biomass in six Biosorption-desorption cycles without any considerable loss of Biosorption capacity.

  • cr vi Biosorption from aqueous solutions using free and immobilized biomass of lentinus sajor caju preparation and kinetic characterization
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2005
    Co-Authors: Yakup M Arica, Gulay Bayramoglu
    Abstract:

    Abstract The potential use of the free and immobilized mycelia (in carboxymethylcellulose (CMC)) of Lentinus sajor-caju to remove hexavalent form of chromium ions, Cr(VI), from aqueous solutions was evaluated using CMC bead as a control system for immobilised form of fungus. The CMC beads containing immobilized fungus mycelia were incubated for the uniform growth on the beads surface at 30 °C for 3 days. Effects of pH, Biosorption time, initial concentration and biosorbent dosages on the Biosorption of Cr(VI) ions were studied. The Biosorption of Cr(VI) ions on the biosorbents showed a highest value at around pH 2.0. The Biosorption of Cr(VI) ions on both free and immobilized L. sajor-caju biomass (mg/g) was increased as the initial concentration of Cr(VI) ions increased in the medium. Biosorption equilibrium was established in about 2.0 h. The determined maximum Biosorption capacities of the free and immobilized fungus were 18.9 and 32.2 mg/g dry weight, respectively. The Biosorption equilibrium was also represented with Langmuir and Freundlich adsorption isotherms. The Biosorption of Cr(VI) on these biomasses follows pseudo-second-order kinetics. The temperature change in the range of 5–40 °C affected the Biosorption capacities of the biosorbents. The biosorbent systems can be regenerated using 0.1 M NaOH, with more than 95% recovery, the biosorbents reused in five Biosorption–desorption cycles without any considerable loss in the Biosorption capacity.

  • entrapment of lentinus sajor caju into ca alginate gel beads for removal of cd ii ions from aqueous solution preparation and Biosorption kinetics analysis
    Microchemical Journal, 2002
    Co-Authors: Gulay Bayramoglu, Adil Denizli, Sema Bektas, Yakup M Arica
    Abstract:

    Abstract A white rot fungus species Lentinus sajor-caju biomass was entrapped into alginate gel via a liquid curing method in the presence of Ca(II) ions. The Biosorption of cadmium(II) by the entrapped live and dead fungal biomass has been studied in a batch system. The heat-treatment process enhanced the Biosorption capacity of the immobilized fungal biomass. The effect of initial cadmium concentration, pH and temperature on cadmium removal has been investigated. The maximum experimental Biosorption capacities for entrapped live and dead fungal mycelia of L. sajur-caju were found to be 104.8±2.7 mg Cd(II) g −1 and 123.5±4.3 mg Cd(II) g −1 , respectively. The kinetics of cadmium Biosorption was fast, approximately 85% of Biosorption taking place within 30 min. The Biosorption equilibrium was well described by Langmuir and Freundlich adsorption isotherms. The change in the Biosorption capacity with time is found to fit pseudo-second-order equations. Cadmium binding properties of entrapped fungal preparations have been determined applying the Ruzic equations. Since the Biosorption capacities are relatively high for both entrapped live and dead forms, they could be considered as suitable biosorbents for the removal of cadmium in wastewater treatment systems. The biosorbents were reused in three consecutive adsorption/desorption cycles without significant loss in the Biosorption capacity.