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C F Forster - One of the best experts on this subject based on the ideXlab platform.
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heavy metal adsorption properties of a Submerged Aquatic plant ceratophyllum demersum
Bioresource Technology, 2004Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, C F ForsterAbstract:Abstract Heavy metals can be adsorbed by living or non-living biomass. Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, lead, zinc, and copper adsorption properties of Ceratophyllum demersum (Coontail or hornwort) were investigated and results were compared with other Aquatic Submerged Plants. Data obtained from the initial adsorption studies indicated that C. demersum was capable of removing lead, zinc, and copper from solution. The metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies conformed well to the Langmuir Model. Maximum adsorption capacities ( q max ) onto C. demersum were 6.17 mg/g for Cu(II), 13.98 mg/g for Zn(II) and 44.8 mg/g for Pb(II). Kinetics of adsorption of zinc, lead and copper were analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by pseudo second-order kinetics. The results showed that this Submerged Aquatic plant C. demersum can be successfully used for heavy metal removal under dilute metal concentration.
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heavy metal adsorption characteristics of a Submerged Aquatic plant myriophyllum spicatum
Process Biochemistry, 2003Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, Ahmet Yuceer, C F ForsterAbstract:Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, the adsorption properties of Myriophyllum spicatum (Eurasian watermilfoil) for lead, zinc, and copper were investigated and the results were compared with other Aquatic Submerged Plants. Data obtained from the initial batch adsorption studies have indicated that M. spicatum is capable of removing lead, zinc, and copper from solution. Metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies fitted the Langmuir model. The maximum adsorption capacities (qmax) were 10.37 mg/g for Cu(II), 15.59 mg/g for Zn(II) and 46.49 mg/g for Pb(II). The kinetics of adsorption of zinc, lead and copper were also analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by the pseudo second order kinetics. The results showed that this Submerged Aquatic plant M. spicatum can be successfully used for heavy metal removal.
Olcayto Keskinkan - One of the best experts on this subject based on the ideXlab platform.
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comparison of the adsorption capabilities of myriophyllum spicatum and ceratophyllum demersum for zinc copper and lead
Engineering in Life Sciences, 2007Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, Ahmet Yuceer, M BasibuyukAbstract:Industrial wastewaters contain various heavy metal components and therefore threaten Aquatic bodies. Heavy metals can be adsorbed by living or non-living biomass. Submerged Aquatic Plants can be used for the removal of heavy metals. This paper exhibits the comparison of the adsorption properties of two Aquatic Plants Myriophyllum spicatum and Ceratophyllum demersum for lead, zinc, and copper. The data obtained from batch studies conformed well to the Langmuir Model. Maximum adsorption capacities (q max ) were obtained for both plant species and each metal. The maximum adsorption capacities (q maX ) achieved with M. spicatum were 10.37 mg/g for Cu 2+ , and 15.59 mg/g for Zn2 + as well as 46.49 mg/g for Pb 2+ and with C. demersum they were 6.17 mg/g for Cu 2+ , 13.98 mg/g for Zn 2+ and 44.8 mg/g for Pb 2+ . It was found that M. spicatum has a better adsorption capacity than C. demersum for each metal tested. Gibbs free energy and the specific surface area based on the q maX values were also determined for each metal.
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heavy metal adsorption properties of a Submerged Aquatic plant ceratophyllum demersum
Bioresource Technology, 2004Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, C F ForsterAbstract:Abstract Heavy metals can be adsorbed by living or non-living biomass. Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, lead, zinc, and copper adsorption properties of Ceratophyllum demersum (Coontail or hornwort) were investigated and results were compared with other Aquatic Submerged Plants. Data obtained from the initial adsorption studies indicated that C. demersum was capable of removing lead, zinc, and copper from solution. The metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies conformed well to the Langmuir Model. Maximum adsorption capacities ( q max ) onto C. demersum were 6.17 mg/g for Cu(II), 13.98 mg/g for Zn(II) and 44.8 mg/g for Pb(II). Kinetics of adsorption of zinc, lead and copper were analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by pseudo second-order kinetics. The results showed that this Submerged Aquatic plant C. demersum can be successfully used for heavy metal removal under dilute metal concentration.
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heavy metal adsorption characteristics of a Submerged Aquatic plant myriophyllum spicatum
Process Biochemistry, 2003Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, Ahmet Yuceer, C F ForsterAbstract:Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, the adsorption properties of Myriophyllum spicatum (Eurasian watermilfoil) for lead, zinc, and copper were investigated and the results were compared with other Aquatic Submerged Plants. Data obtained from the initial batch adsorption studies have indicated that M. spicatum is capable of removing lead, zinc, and copper from solution. Metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies fitted the Langmuir model. The maximum adsorption capacities (qmax) were 10.37 mg/g for Cu(II), 15.59 mg/g for Zn(II) and 46.49 mg/g for Pb(II). The kinetics of adsorption of zinc, lead and copper were also analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by the pseudo second order kinetics. The results showed that this Submerged Aquatic plant M. spicatum can be successfully used for heavy metal removal.
M Basibuyuk - One of the best experts on this subject based on the ideXlab platform.
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comparison of the adsorption capabilities of myriophyllum spicatum and ceratophyllum demersum for zinc copper and lead
Engineering in Life Sciences, 2007Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, Ahmet Yuceer, M BasibuyukAbstract:Industrial wastewaters contain various heavy metal components and therefore threaten Aquatic bodies. Heavy metals can be adsorbed by living or non-living biomass. Submerged Aquatic Plants can be used for the removal of heavy metals. This paper exhibits the comparison of the adsorption properties of two Aquatic Plants Myriophyllum spicatum and Ceratophyllum demersum for lead, zinc, and copper. The data obtained from batch studies conformed well to the Langmuir Model. Maximum adsorption capacities (q max ) were obtained for both plant species and each metal. The maximum adsorption capacities (q maX ) achieved with M. spicatum were 10.37 mg/g for Cu 2+ , and 15.59 mg/g for Zn2 + as well as 46.49 mg/g for Pb 2+ and with C. demersum they were 6.17 mg/g for Cu 2+ , 13.98 mg/g for Zn 2+ and 44.8 mg/g for Pb 2+ . It was found that M. spicatum has a better adsorption capacity than C. demersum for each metal tested. Gibbs free energy and the specific surface area based on the q maX values were also determined for each metal.
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heavy metal adsorption properties of a Submerged Aquatic plant ceratophyllum demersum
Bioresource Technology, 2004Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, C F ForsterAbstract:Abstract Heavy metals can be adsorbed by living or non-living biomass. Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, lead, zinc, and copper adsorption properties of Ceratophyllum demersum (Coontail or hornwort) were investigated and results were compared with other Aquatic Submerged Plants. Data obtained from the initial adsorption studies indicated that C. demersum was capable of removing lead, zinc, and copper from solution. The metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies conformed well to the Langmuir Model. Maximum adsorption capacities ( q max ) onto C. demersum were 6.17 mg/g for Cu(II), 13.98 mg/g for Zn(II) and 44.8 mg/g for Pb(II). Kinetics of adsorption of zinc, lead and copper were analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by pseudo second-order kinetics. The results showed that this Submerged Aquatic plant C. demersum can be successfully used for heavy metal removal under dilute metal concentration.
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heavy metal adsorption characteristics of a Submerged Aquatic plant myriophyllum spicatum
Process Biochemistry, 2003Co-Authors: Olcayto Keskinkan, Munir Ziya Lugal Goksu, M Basibuyuk, Ahmet Yuceer, C F ForsterAbstract:Submerged Aquatic Plants can be used for the removal of heavy metals. In this paper, the adsorption properties of Myriophyllum spicatum (Eurasian watermilfoil) for lead, zinc, and copper were investigated and the results were compared with other Aquatic Submerged Plants. Data obtained from the initial batch adsorption studies have indicated that M. spicatum is capable of removing lead, zinc, and copper from solution. Metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies fitted the Langmuir model. The maximum adsorption capacities (qmax) were 10.37 mg/g for Cu(II), 15.59 mg/g for Zn(II) and 46.49 mg/g for Pb(II). The kinetics of adsorption of zinc, lead and copper were also analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by the pseudo second order kinetics. The results showed that this Submerged Aquatic plant M. spicatum can be successfully used for heavy metal removal.
Elisabeth S Bakker - One of the best experts on this subject based on the ideXlab platform.
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finding the harvesting frequency to maximize nutrient removal in a constructed wetland dominated by Submerged Aquatic Plants
Ecological Engineering, 2017Co-Authors: M J J M Verhofstad, Elisabeth S Bakker, M D M Poelen, M M L Van Kempen, A J P SmoldersAbstract:Abstract Water quality is still poor in many freshwater ecosystems around the world as a result of anthropogenic nutrient loading. Constructed wetlands can be used to remove excess nutrients. In these wetlands, helophytes or free floating Aquatic Plants are traditionally used to absorb the nutrients. The nutrients are subsequently exported upon harvesting of the Plants. However, rooted Submerged Plants may be more effective to extract nutrients from moderately eutrophicated ecosystems than helophytes or floating species. Here, we tested how the frequency of harvesting affected Submerged biomass production, biomass nutrient content and the resulting amount of nutrients removed, as well as the vegetation composition and structure. Two Myriophyllum spicatum dominated shallow ponds, with moderately low surface water nutrient loading (∼5.6 mg N.m−2.d−1 and ∼1.32 mg P.m−2.d−1) were used. Each pond was subjected to four harvesting treatments: mowing 1x, 2x, 3 x or 5 x between May and September 2015. Harvesting 2 x or 3 x removed most biomass and nutrients, while mowing either 5 x or only once at the end of the growing season removed the lowest amount of nutrients from the system. Furthermore, the dominance of M. spicatum in the vegetation was best maintained in plots mown 2 x, while its cover declined in plots mown more frequently, resulting in an increase of charophyte abundance. We conclude that harvesting at an intermediate frequency is best when aiming to remove the maximum amount of nutrients under a moderately low nutrient loading. Harvesting more frequently may be a suitable management method to reduce dominance of M. spicatum in situations where it causes nuisance problems due to massive growth.
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impact of temperature and nutrients on carbon nutrient tissue stoichiometry of Submerged Aquatic Plants an experiment and meta analysis
Frontiers in Plant Science, 2017Co-Authors: Mandy Velthuis, Emma Van Deelen, Ellen Van Donk, Peiyu Zhang, Elisabeth S BakkerAbstract:Human activity is currently changing our environment rapidly, with predicted temperature increases of 1-5°C over the coming century and increased nitrogen and phosphorus inputs in Aquatic ecosystems. In the shallow parts of these ecosystems, Submerged Aquatic Plants enhance water clarity by resource competition with phytoplankton, provide habitat and serve as a food source for other organisms. The carbon:nutrient stoichiometry of Submerged Aquatic Plants can be affected by changes in both temperature and nutrient availability. We hypothesized that elevated temperature leads to higher carbon:nutrient ratios through enhanced nutrient-use efficiency, while nutrient addition leads to lower carbon:nutrient ratios by the luxurious uptake of nutrients. We addressed these hypotheses with an experimental and a meta-analytical approach. We performed a full-factorial microcosm experiment with the freshwater plant Elodea nuttallii grown at 10, 15, 20 and 25 °C on sediment consisting of pond soil/sand mixtures with 100, 50, 25 and 12.5% pond soil. To address the effect of climatic warming and nutrient addition on the carbon:nutrient stoichiometry of Submerged Aquatic Plants in general, we performed a meta-analysis on experimental studies that elevated temperature and/or added nutrients (nitrogen and phosphorus). In the microcosm experiment, C:N ratios of Elodea nuttallii decreased with increasing temperature, and this effect was most pronounced at intermediate nutrient availability. Furthermore, higher nutrient availability led to decreased aboveground C:P ratios. In the meta-analysis, nutrient addition led to a 25, 22 and 16% reduction in aboveground C:N and C:P ratios and belowground C:N ratios, accompanied with increased N content. No consistent effect of elevated temperature on plant stoichiometry could be observed, as very few studies were found on this topic and contrasting results were reported. We conclude that while nutrient addition consistently leads to decreased carbon:nutrient ratios, elevated temperature does not change Submerged Aquatic plant carbon:nutrient stoichiometry in a consistent manner. This effect is rather dependent on nutrient availability and may be species-specific. As changes in the carbon:nutrient stoichiometry of Submerged Aquatic Plants can impact the transfer of energy to higher trophic levels, these results suggest that eutrophication may enhance plant consumption and decomposition, which could in turn have consequences for carbon sequestration.
Jie Chi - One of the best experts on this subject based on the ideXlab platform.
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pilot scale demonstration of phytoremediation of pah contaminated sediments by hydrilla verticillata and vallisneria spiralis
Environmental Technology, 2019Co-Authors: Jie ChiAbstract:ABSTRACTThe results of phytoremediation of sediments contaminated with polycyclic aromatic hydrocarbons (PAHs) by two Submerged Aquatic Plants (Vallisneria spiralis and Hydrilla verticillata) at pilot scale were reported for the first time in this study. During a 108-day period, the Plants grew well, and more PAHs were dissipated in planted sediments than in unplanted sediments. At the end, dissipation ratios of phenanthrene and pyrene were 85.9% and 79.1% in sediments planted with V. spiralis, 76.3% and 64.6% in sediments planted with H. verticillata, but only 64.8% and 55.8% in unplanted sediments. V. spiralis exhibited higher phytoremediation ability, which was significantly related to its root oxygenation as indicated by the redox potential in sediments. The remediation results at pilot scale were also compared with those previously obtained in our laboratory. The ratio of root weight to sediment weight showed a similar trend to PAH dissipation enhancement. Bioconcentration factors of PAHs in the two ...
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Pilot-scale demonstration of phytoremediation of PAH-contaminated sediments by Hydrilla verticillata and Vallisneria spiralis
2017Co-Authors: Jie ChiAbstract:The results of phytoremediation of sediments contaminated with polycyclic aromatic hydrocarbons (PAHs) by two Submerged Aquatic Plants (Vallisneria spiralis and Hydrilla verticillata) at pilot scale were reported for the first time in this study. During a 108-day period, the Plants grew well, and more PAHs were dissipated in planted sediments than in unplanted sediments. At the end, dissipation ratios of phenanthrene and pyrene were 85.9% and 79.1% in sediments planted with V. spiralis, 76.3% and 64.6% in sediments planted with H. verticillata, but only 64.8% and 55.8% in unplanted sediments. V. spiralis exhibited higher phytoremediation ability, which was significantly related to its root oxygenation as indicated by the redox potential in sediments. The remediation results at pilot scale were also compared with those previously obtained in our laboratory. The ratio of root weight to sediment weight showed a similar trend to PAH dissipation enhancement. Bioconcentration factors of PAHs in the two Plants were larger in the pilot experiment than in the laboratory tests as a result of quicker increase of plant weight in the pilot experiment.
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phytoremediation of sediments polluted with phenanthrene and pyrene by four Submerged Aquatic Plants
Journal of Soils and Sediments, 2016Co-Authors: Jie ChiAbstract:Plant species was considered to be a significant factor influencing the efficiency of phytoremediation. Therefore, the ability of four Submerged Aquatic Plants to facilitate the remediation of sediments polluted with polycyclic aromatic hydrocarbons (PAHs) was compared. Surface sediments (top 0–15 cm) were collected from the Haihe River, Tianjin, China, and spiked with a mixture of phenanthrene and pyrene (about 15 mg kg−1 dry sediment of each PAH). Four Submerged Aquatic plant species (Hydrilla verticillata, Myriophyllum verticillatum, Vallisneria spiralis, and Potamogeton crispus L.) were used for the remediation experiment. The experiment lasted for 54 days. Plant length and fresh weight, and root morphology were measured. Concentrations of phenanthrene and pyrene in Plants and sediments were analyzed. Sediment redox potential and PAH-degrading bacterial population were also determined. During a 54-day experiment, more PAHs were dissipated in planted sediments than in unplanted sediments. At the end, dissipation ratios of phenanthrene and pyrene were 48.0–85.3 and 45.7–82.4 % in planted sediments but only 33.9 and 38.3 % in unplanted sediments. Dissipation ratios of the PAHs were significantly different among the four plant species and were the highest in sediments with V. spiralis. Mass balance calculation showed that plant accumulation of phenanthrene and pyrene accounted for less than 1.0 and 6.9 % of the dissipation increments, respectively. Among the Plants tested, there were significantly positive correlations between PAH dissipation ratios and sediment redox potentials. The results suggested that different from terrestrial plant, enhanced dissipation of PAHs by Submerged Aquatic Plants might be mainly attributed to differences in root oxygenation capabilities. Furthermore, root oxygenation may be a useful tool in screening Plants for efficient remediation of PAH-polluted sediments. Extension of these results to field-aged PAH-contaminated sediments needs further investigation.
