The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Ilaria Braschi - One of the best experts on this subject based on the ideXlab platform.
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Effect of humic monomers on the adsorption of sulfamethoxazole Sulfonamide Antibiotic into a high silica zeolite Y: An interdisciplinary study.
Chemosphere, 2016Co-Authors: Ilaria Braschi, Sonia Blasioli, Annalisa Martucci, L. L. Mzini, Claudio Ciavatta, Maurizio CossiAbstract:Abstract The adsorption efficiency of a high silica zeolite Y towards sulfamethoxazole, a Sulfonamide Antibiotic, was evaluated in the presence of two humic monomers, vanillin and caffeic acid, representative of phenolic compounds usually occurring in water bodies, owing their dimension comparable to those of the zeolite microporosity. In the entire range of investigated pH (5–8), adsorption of vanillin, as a single component, was reversible whereas it was irreversible for sulfamethoxazole. In equimolar ternary mixtures, vanillin coadsorbed with sulfamethoxazole, conversely to what observed for caffeic acid, accordingly to their adsorption kinetics and pK a values. Lower and higher adsorptions were observed for sulfamethoxazole and vanillin, respectively, than what it was observed as single components, clearly revealing guest-guest interactions. An adduct formed through H-bonding between the carbonyl oxygen of vanillin and the heterocycle NH of sulfamethoxazole in amide form was observed in the zeolite pore by combined FTIR and Rietveld analysis, in agreement with Density Functional Theory calculations of the adduct stabilization energies. The formation of similar adducts, able to stabilize other naturally occurring phenolic compounds in the microporosities of hydrophobic sorbents, was proposed.
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Removal of sulfamethoxazole Sulfonamide Antibiotic from water by high silica zeolites: a study of the involved host-guest interactions by a combined structural, spectroscopic, and computational approach.
Journal of colloid and interface science, 2013Co-Authors: Sonia Blasioli, Annalisa Martucci, Maurizio Cossi, Lara Gigli, Leonardo Marchese, Geo Paul, Cliff T. Johnston, Ilaria BraschiAbstract:Sulfonamide Antibiotics are persistent pollutants present in surface and subsurface waters in both agricultural and urban environments. Sulfonamides are of particular concern in the environment because they are known to induce high levels of bacterial resistance. Adsorption of sulfamethoxazole Sulfonamide Antibiotic into three high silica zeolites (Y, mordenite, and ZSM-5) with pore opening sizes comparable to sulfamethoxazole dimensions is reported. Sulfamethoxazole was almost completely removed from water by zeolite Y and MOR in a few minutes. Adsorption onto ZSM-5 showed an increased kinetics with increasing temperature. Antibiotic sorption was largely irreversible with little Antibiotic desorbed. Sulfamethoxazole incorporation and localization into the pore of each zeolite system was defined along with medium-weak and cooperative host–guest interactions in which water molecules play a certain role only in zeolite Y and mordenite.
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Adsorption and reaction of sulfachloropyridazine Sulfonamide Antibiotic on a high silica mordenite: A structural and spectroscopic combined study
Microporous and Mesoporous Materials, 2013Co-Authors: Annalisa Martucci, Sonia Blasioli, Mauro Andrea Cremonini, Lara Gigli, Giorgio Gatti, Leonardo Marchese, Ilaria BraschiAbstract:Abstract Owing to their acidic nature, Sulfonamide Antibiotics concentrate in anionic form in water bodies where they can remain unchanged for long periods of time, accounting for great concern for Antibiotic-resistance issues. In this study the removal of sulfachloropyridazine (4-amino- N -(6- Cl -3-pyridazinyl)benzene Sulfonamide) Antibiotic from water by adsorption on a high silica mordenite with channel window dimension comparable to that of the Antibiotic, and with a significant concentration of internal silanol groups due to the dealumination process, was investigated. The adsorption of sulfachloropyridazine by mordenite at room temperature was completed within 4 h with the maximal amount of adsorbed Antibiotic of 15.1% zeolite dry weight. The desorption trials elucidated the irreversibility of the adsorption process. The embedding of sulfachloropyridazine into mordenite channels was confirmed by a combined XRPD and FTIR study. Rietveld structure refinement revealed that the incorporation of sulfachloropyridazine molecules caused changes in the dimension of the zeolite channel systems, when compared to the parent zeolite, and a close vicinity of the heterocycle ring nitrogen to the oxygens of mordenite side pocket. FTIR revealed a strong perturbation of the vibrational modes of both the pyridazinyl ring and mordenite silanol groups upon Antibiotic adsorption. When the adsorption was conducted at 65 °C, an unfavourable temperature effect was highlighted and, interestingly, sulfachloropyridazine transformed with 100% selectivity to 4-amino- N -(6-hydroxyl-3-pyridazinyl)benzene Sulfonamide. A nucleophilic aromatic substitution (S N Ar) mechanism was suggested for the formation of the reaction product. It is proposed that the H-bond between mordenite silanol groups and pyridazine nitrogen atom, clearly detected by FTIR, stabilize in the ring partial positive charges favouring the displacement of the chloride leaving group.
Ihnsil Kwak - One of the best experts on this subject based on the ideXlab platform.
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disrupting effects of Antibiotic sulfathiazole on developmental process during sensitive life cycle stage of chironomus riparius
Chemosphere, 2018Co-Authors: Kiyun Park, Ihnsil KwakAbstract:Abstract Antibiotics in the environment are a concern due to their potential to harm humans and interrupt ecosystems. Sulfathiazole (STZ), a Sulfonamide Antibiotic, is commonly used in aquaculture and is typically found in aquatic ecosystems. We evaluated the ecological risk of STZ by examining biological, molecular and biochemical response in Chironomus riparius. Samples were exposed to STZ for 12, 24 and 96 h, and effects of STZ were evaluated at the molecular level by analyzing changes in gene expression related to the endocrine system, cellular stress response and enzyme activity of genes on antioxidant and detoxification pathways. STZ exposure induced significant effects on survival, growth and sex ratio of emergent adults and mouthpart deformity in C. riparius . STZ caused concentration and time-dependent toxicity in most of the selected biomarkers. STZ exposure leads to significant heat-shock response of protein genes (HSP70, HSP40, HSP90 and HSP27) and to disruption by up-regulating selected genes, including the ecdysone receptor gene, estrogen-related receptors, ultraspiracle and E74 early ecdysone-responsive gene. Furthermore, STZ induced alteration of enzyme activities on antioxidant and detoxification responses (catalase, superoxide dismutase, glutathione peroxidase and peroxidase) in C. riparius . By inducing oxidative stress, Antibiotic STZ disturbs the endocrine system and produces adverse effects in growth processes of invertebrates.
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disrupting effects of Antibiotic sulfathiazole on developmental process during sensitive life cycle stage of chironomus riparius
Chemosphere, 2018Co-Authors: Kiyun Park, Ihnsil KwakAbstract:Abstract Antibiotics in the environment are a concern due to their potential to harm humans and interrupt ecosystems. Sulfathiazole (STZ), a Sulfonamide Antibiotic, is commonly used in aquaculture and is typically found in aquatic ecosystems. We evaluated the ecological risk of STZ by examining biological, molecular and biochemical response in Chironomus riparius. Samples were exposed to STZ for 12, 24 and 96 h, and effects of STZ were evaluated at the molecular level by analyzing changes in gene expression related to the endocrine system, cellular stress response and enzyme activity of genes on antioxidant and detoxification pathways. STZ exposure induced significant effects on survival, growth and sex ratio of emergent adults and mouthpart deformity in C. riparius . STZ caused concentration and time-dependent toxicity in most of the selected biomarkers. STZ exposure leads to significant heat-shock response of protein genes (HSP70, HSP40, HSP90 and HSP27) and to disruption by up-regulating selected genes, including the ecdysone receptor gene, estrogen-related receptors, ultraspiracle and E74 early ecdysone-responsive gene. Furthermore, STZ induced alteration of enzyme activities on antioxidant and detoxification responses (catalase, superoxide dismutase, glutathione peroxidase and peroxidase) in C. riparius . By inducing oxidative stress, Antibiotic STZ disturbs the endocrine system and produces adverse effects in growth processes of invertebrates.
Shaobin Wang - One of the best experts on this subject based on the ideXlab platform.
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adsorptive removal of Antibiotic Sulfonamide by uio 66 and zif 67 for wastewater treatment
Journal of Colloid and Interface Science, 2017Co-Authors: Muhammad Rizwan Azhar, Hussein Rasool Abid, Hongqi Sun, Vijay Periasamy, Moses O. Tadé, Shaobin WangAbstract:Adsorptive removal of a toxic Sulfonamide Antibiotic, sulfachloropyradazine (SCP), from aqueous solution was studied on several metal organic frameworks, UiO-66 and ZIF-67, for the first time. UiO-66 exhibited a much higher adsorption capacity than ZIF-67, fast kinetics, and easy regeneration for reuse, demonstrating as a promising adsorbent in wastewater treatment processes. The batch adsorption shows an adsorption capacity of SCP at 417mg/g on UiO-66. The kinetic adsorption of SCP on UiO-66 reached equilibrium just in 10min and the kinetics fits accurately with a pseudo 2nd order model. A plausible mechanism was proposed based on pH effect, pKa value of the adsorbate and Zeta potential of UiO-66. The high adsorption is mainly contributed to hydrophobicity and π-π interactions along with electrostatic interactions. Thermodynamic studies show the spontaneous adsorption and exothermic process. The easy regeneration and high adsorption capacity confirms structural stability of the robust UiO-66 in wastewater treatment processes, making it suitable for a large scale application.
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Excellent performance of copper based metal organic framework in adsorptive removal of toxic Sulfonamide Antibiotics from wastewater
Journal of colloid and interface science, 2016Co-Authors: Muhammad Rizwan Azhar, Hussein Rasool Abid, Hongqi Sun, Vijay Periasamy, Moses O. Tadé, Shaobin WangAbstract:The increasing concerns on toxicity of Sulfonamide Antibiotics in water require a prompt action to establish efficient wastewater treatment processes for their removal. In this study, adsorptive removal of a model Sulfonamide Antibiotic, sulfachloropyridazine (SCP), from wastewater is presented for the first time using a metal organic framework (MOF). A high surface area and thermally stable MOF, HKUST-1, was synthesized by a facile method. Batch adsorption studies were systematically carried out using HKUST-1. The high surface area and unsaturated metal sites resulted in a significant adsorption capacity with faster kinetics. Most of the SCP was removed in 15min and the kinetic data were best fitted with the pseudo second order model. Moreover, isothermal data were best fitted with the Langmuir model. The thermodynamic results showed that the adsorption is a spontaneous and endothermic process. The adsorption capacity of HKUST-1 is 384mg/g at 298K which is the highest compared to most of the materials for the Antibiotics. The high adsorption capacity is attributed mainly to π-π stacking, hydrogen bonding and electrostatic interactions.
Sonia Blasioli - One of the best experts on this subject based on the ideXlab platform.
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Effect of humic monomers on the adsorption of sulfamethoxazole Sulfonamide Antibiotic into a high silica zeolite Y: An interdisciplinary study.
Chemosphere, 2016Co-Authors: Ilaria Braschi, Sonia Blasioli, Annalisa Martucci, L. L. Mzini, Claudio Ciavatta, Maurizio CossiAbstract:Abstract The adsorption efficiency of a high silica zeolite Y towards sulfamethoxazole, a Sulfonamide Antibiotic, was evaluated in the presence of two humic monomers, vanillin and caffeic acid, representative of phenolic compounds usually occurring in water bodies, owing their dimension comparable to those of the zeolite microporosity. In the entire range of investigated pH (5–8), adsorption of vanillin, as a single component, was reversible whereas it was irreversible for sulfamethoxazole. In equimolar ternary mixtures, vanillin coadsorbed with sulfamethoxazole, conversely to what observed for caffeic acid, accordingly to their adsorption kinetics and pK a values. Lower and higher adsorptions were observed for sulfamethoxazole and vanillin, respectively, than what it was observed as single components, clearly revealing guest-guest interactions. An adduct formed through H-bonding between the carbonyl oxygen of vanillin and the heterocycle NH of sulfamethoxazole in amide form was observed in the zeolite pore by combined FTIR and Rietveld analysis, in agreement with Density Functional Theory calculations of the adduct stabilization energies. The formation of similar adducts, able to stabilize other naturally occurring phenolic compounds in the microporosities of hydrophobic sorbents, was proposed.
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Removal of sulfamethoxazole Sulfonamide Antibiotic from water by high silica zeolites: a study of the involved host-guest interactions by a combined structural, spectroscopic, and computational approach.
Journal of colloid and interface science, 2013Co-Authors: Sonia Blasioli, Annalisa Martucci, Maurizio Cossi, Lara Gigli, Leonardo Marchese, Geo Paul, Cliff T. Johnston, Ilaria BraschiAbstract:Sulfonamide Antibiotics are persistent pollutants present in surface and subsurface waters in both agricultural and urban environments. Sulfonamides are of particular concern in the environment because they are known to induce high levels of bacterial resistance. Adsorption of sulfamethoxazole Sulfonamide Antibiotic into three high silica zeolites (Y, mordenite, and ZSM-5) with pore opening sizes comparable to sulfamethoxazole dimensions is reported. Sulfamethoxazole was almost completely removed from water by zeolite Y and MOR in a few minutes. Adsorption onto ZSM-5 showed an increased kinetics with increasing temperature. Antibiotic sorption was largely irreversible with little Antibiotic desorbed. Sulfamethoxazole incorporation and localization into the pore of each zeolite system was defined along with medium-weak and cooperative host–guest interactions in which water molecules play a certain role only in zeolite Y and mordenite.
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Adsorption and reaction of sulfachloropyridazine Sulfonamide Antibiotic on a high silica mordenite: A structural and spectroscopic combined study
Microporous and Mesoporous Materials, 2013Co-Authors: Annalisa Martucci, Sonia Blasioli, Mauro Andrea Cremonini, Lara Gigli, Giorgio Gatti, Leonardo Marchese, Ilaria BraschiAbstract:Abstract Owing to their acidic nature, Sulfonamide Antibiotics concentrate in anionic form in water bodies where they can remain unchanged for long periods of time, accounting for great concern for Antibiotic-resistance issues. In this study the removal of sulfachloropyridazine (4-amino- N -(6- Cl -3-pyridazinyl)benzene Sulfonamide) Antibiotic from water by adsorption on a high silica mordenite with channel window dimension comparable to that of the Antibiotic, and with a significant concentration of internal silanol groups due to the dealumination process, was investigated. The adsorption of sulfachloropyridazine by mordenite at room temperature was completed within 4 h with the maximal amount of adsorbed Antibiotic of 15.1% zeolite dry weight. The desorption trials elucidated the irreversibility of the adsorption process. The embedding of sulfachloropyridazine into mordenite channels was confirmed by a combined XRPD and FTIR study. Rietveld structure refinement revealed that the incorporation of sulfachloropyridazine molecules caused changes in the dimension of the zeolite channel systems, when compared to the parent zeolite, and a close vicinity of the heterocycle ring nitrogen to the oxygens of mordenite side pocket. FTIR revealed a strong perturbation of the vibrational modes of both the pyridazinyl ring and mordenite silanol groups upon Antibiotic adsorption. When the adsorption was conducted at 65 °C, an unfavourable temperature effect was highlighted and, interestingly, sulfachloropyridazine transformed with 100% selectivity to 4-amino- N -(6-hydroxyl-3-pyridazinyl)benzene Sulfonamide. A nucleophilic aromatic substitution (S N Ar) mechanism was suggested for the formation of the reaction product. It is proposed that the H-bond between mordenite silanol groups and pyridazine nitrogen atom, clearly detected by FTIR, stabilize in the ring partial positive charges favouring the displacement of the chloride leaving group.
Maurizio Cossi - One of the best experts on this subject based on the ideXlab platform.
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Effect of humic monomers on the adsorption of sulfamethoxazole Sulfonamide Antibiotic into a high silica zeolite Y: An interdisciplinary study.
Chemosphere, 2016Co-Authors: Ilaria Braschi, Sonia Blasioli, Annalisa Martucci, L. L. Mzini, Claudio Ciavatta, Maurizio CossiAbstract:Abstract The adsorption efficiency of a high silica zeolite Y towards sulfamethoxazole, a Sulfonamide Antibiotic, was evaluated in the presence of two humic monomers, vanillin and caffeic acid, representative of phenolic compounds usually occurring in water bodies, owing their dimension comparable to those of the zeolite microporosity. In the entire range of investigated pH (5–8), adsorption of vanillin, as a single component, was reversible whereas it was irreversible for sulfamethoxazole. In equimolar ternary mixtures, vanillin coadsorbed with sulfamethoxazole, conversely to what observed for caffeic acid, accordingly to their adsorption kinetics and pK a values. Lower and higher adsorptions were observed for sulfamethoxazole and vanillin, respectively, than what it was observed as single components, clearly revealing guest-guest interactions. An adduct formed through H-bonding between the carbonyl oxygen of vanillin and the heterocycle NH of sulfamethoxazole in amide form was observed in the zeolite pore by combined FTIR and Rietveld analysis, in agreement with Density Functional Theory calculations of the adduct stabilization energies. The formation of similar adducts, able to stabilize other naturally occurring phenolic compounds in the microporosities of hydrophobic sorbents, was proposed.
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Removal of sulfamethoxazole Sulfonamide Antibiotic from water by high silica zeolites: a study of the involved host-guest interactions by a combined structural, spectroscopic, and computational approach.
Journal of colloid and interface science, 2013Co-Authors: Sonia Blasioli, Annalisa Martucci, Maurizio Cossi, Lara Gigli, Leonardo Marchese, Geo Paul, Cliff T. Johnston, Ilaria BraschiAbstract:Sulfonamide Antibiotics are persistent pollutants present in surface and subsurface waters in both agricultural and urban environments. Sulfonamides are of particular concern in the environment because they are known to induce high levels of bacterial resistance. Adsorption of sulfamethoxazole Sulfonamide Antibiotic into three high silica zeolites (Y, mordenite, and ZSM-5) with pore opening sizes comparable to sulfamethoxazole dimensions is reported. Sulfamethoxazole was almost completely removed from water by zeolite Y and MOR in a few minutes. Adsorption onto ZSM-5 showed an increased kinetics with increasing temperature. Antibiotic sorption was largely irreversible with little Antibiotic desorbed. Sulfamethoxazole incorporation and localization into the pore of each zeolite system was defined along with medium-weak and cooperative host–guest interactions in which water molecules play a certain role only in zeolite Y and mordenite.
