The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Ali Trabolsi - One of the best experts on this subject based on the ideXlab platform.
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Porous Polycalix[4]arenes for Fast and Efficient Removal of Organic Micropollutants from Water
ACS Applied Materials & Interfaces, 2018Co-Authors: Dinesh Shetty, Ilma Jahovic, Jesus Raya, Zouhair Asfari, John-carl Olsen, Ali TrabolsiAbstract:Organic micropollutants are hazards to the environment and human health. Conventional technologies are often inefficient at removing them from wastewater. For example, commercial activated carbon (AC) exhibits slow uptake rates, limited capacities, and is costly to regenerate. Here, we report the utility of porous calix[4]arene-based materials, CalPn (n = 2–4), for water purification. Calixarenes are a common motif in supramolecular chemistry but have rarely been incorporated into extended, porous networks such as organic polymers. CalPn exhibit pollutant uptake rates (Kobs) and adsorption capacities (qmax) that are among the highest reported. For example, the Kobs of CalP4 for bisphenol A (BPA) is 2.12 mg/g·min, which is significantly higher (16 to 240 times) than Kobs for ACs and 1.4 times higher than that of the most efficient material previously reported; the qmax of CalP4 for BPA is 403 mg/g. The CalPn polymers can be regenerated several times, with performance levels left undiminished, by a simple wash procedure that is less energy intensive than that required for ACs. These findings demonstrate the potential of calixarene-based materials for organic micropollutant removal.
Dinesh Shetty - One of the best experts on this subject based on the ideXlab platform.
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Porous Polycalix[4]arenes for Fast and Efficient Removal of Organic Micropollutants from Water
ACS Applied Materials & Interfaces, 2018Co-Authors: Dinesh Shetty, Ilma Jahovic, Jesus Raya, Zouhair Asfari, John-carl Olsen, Ali TrabolsiAbstract:Organic micropollutants are hazards to the environment and human health. Conventional technologies are often inefficient at removing them from wastewater. For example, commercial activated carbon (AC) exhibits slow uptake rates, limited capacities, and is costly to regenerate. Here, we report the utility of porous calix[4]arene-based materials, CalPn (n = 2–4), for water purification. Calixarenes are a common motif in supramolecular chemistry but have rarely been incorporated into extended, porous networks such as organic polymers. CalPn exhibit pollutant uptake rates (Kobs) and adsorption capacities (qmax) that are among the highest reported. For example, the Kobs of CalP4 for bisphenol A (BPA) is 2.12 mg/g·min, which is significantly higher (16 to 240 times) than Kobs for ACs and 1.4 times higher than that of the most efficient material previously reported; the qmax of CalP4 for BPA is 403 mg/g. The CalPn polymers can be regenerated several times, with performance levels left undiminished, by a simple wash procedure that is less energy intensive than that required for ACs. These findings demonstrate the potential of calixarene-based materials for organic micropollutant removal.
Gidon Czapski - One of the best experts on this subject based on the ideXlab platform.
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Flash Photolysis of Hydrogen Peroxide I: The Reaction of Ozonide with Hydrogen Peroxide
Israel Journal of Chemistry, 2013Co-Authors: Dm Behar, Gidon CzapskiAbstract:The photochemistry of basic aqueous solutions containing hydrogen peroxide and oxygen has been investigated by the flash photolysis method. The decay of O3− was followed at 4300 A over the pH range 13 – 13.7 as a function of hydrogen peroxide and oxygen concentrations. The decay was found to be of the first order under all conditions −[d(O3)−/dt] = Kobs[O3−]. The pseudo first-order rate constant Kobs was found to be dependent on H2O2 and O2 concentrations. A mechanism which is consistent with the experimental results is suggested.
John-carl Olsen - One of the best experts on this subject based on the ideXlab platform.
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Porous Polycalix[4]arenes for Fast and Efficient Removal of Organic Micropollutants from Water
ACS Applied Materials & Interfaces, 2018Co-Authors: Dinesh Shetty, Ilma Jahovic, Jesus Raya, Zouhair Asfari, John-carl Olsen, Ali TrabolsiAbstract:Organic micropollutants are hazards to the environment and human health. Conventional technologies are often inefficient at removing them from wastewater. For example, commercial activated carbon (AC) exhibits slow uptake rates, limited capacities, and is costly to regenerate. Here, we report the utility of porous calix[4]arene-based materials, CalPn (n = 2–4), for water purification. Calixarenes are a common motif in supramolecular chemistry but have rarely been incorporated into extended, porous networks such as organic polymers. CalPn exhibit pollutant uptake rates (Kobs) and adsorption capacities (qmax) that are among the highest reported. For example, the Kobs of CalP4 for bisphenol A (BPA) is 2.12 mg/g·min, which is significantly higher (16 to 240 times) than Kobs for ACs and 1.4 times higher than that of the most efficient material previously reported; the qmax of CalP4 for BPA is 403 mg/g. The CalPn polymers can be regenerated several times, with performance levels left undiminished, by a simple wash procedure that is less energy intensive than that required for ACs. These findings demonstrate the potential of calixarene-based materials for organic micropollutant removal.
Zouhair Asfari - One of the best experts on this subject based on the ideXlab platform.
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Porous Polycalix[4]arenes for Fast and Efficient Removal of Organic Micropollutants from Water
ACS Applied Materials & Interfaces, 2018Co-Authors: Dinesh Shetty, Ilma Jahovic, Jesus Raya, Zouhair Asfari, John-carl Olsen, Ali TrabolsiAbstract:Organic micropollutants are hazards to the environment and human health. Conventional technologies are often inefficient at removing them from wastewater. For example, commercial activated carbon (AC) exhibits slow uptake rates, limited capacities, and is costly to regenerate. Here, we report the utility of porous calix[4]arene-based materials, CalPn (n = 2–4), for water purification. Calixarenes are a common motif in supramolecular chemistry but have rarely been incorporated into extended, porous networks such as organic polymers. CalPn exhibit pollutant uptake rates (Kobs) and adsorption capacities (qmax) that are among the highest reported. For example, the Kobs of CalP4 for bisphenol A (BPA) is 2.12 mg/g·min, which is significantly higher (16 to 240 times) than Kobs for ACs and 1.4 times higher than that of the most efficient material previously reported; the qmax of CalP4 for BPA is 403 mg/g. The CalPn polymers can be regenerated several times, with performance levels left undiminished, by a simple wash procedure that is less energy intensive than that required for ACs. These findings demonstrate the potential of calixarene-based materials for organic micropollutant removal.
