Adsorptive removal of α-endosulfan from water by hydrophobic zeolites. An isothermal study
| Autor: | Isabelle Batonneau-Gener, Arsène H. Yonli, Jean Koulidiati |
|---|---|
| Přispěvatelé: | Zéolithes, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2012 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Inorganic chemistry 02 engineering and technology 010501 environmental sciences 01 natural sciences Isothermal process Adsorption Preferential adsorption Physisorption Environmental Chemistry Molecule Pesticides Zeolite Waste Management and Disposal 0105 earth and related environmental sciences [CHIM.ORGA]Chemical Sciences/Organic chemistry Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Pollution Zeolites Thermodynamics [CHIM.OTHE]Chemical Sciences/Other 0210 nano-technology Mesoporous material Endosulfan Water Pollutants Chemical Water vapor |
| Zdroj: | Journal of Hazardous Materials Journal of Hazardous Materials, Elsevier, 2012, 203-204, pp.357-62. ⟨10.1016/j.jhazmat.2011.12.042⟩ |
| ISSN: | 0304-3894 1873-3336 |
| Popis: | International audience; This paper deals with the removal of α-endosulfan from water over HY and steamed HBEA zeolites. Experiments were performed to understand the adsorption mechanisms of α-endosulfan on zeolites and to determine the most efficient adsorbent for the purification of water contaminated by this pesticide. The experiments exhibit that α-endosulfan was adsorbed in the micropores. In the case of HY zeolites an adsorption of α-endosulfan molecules on BrØnsted sites was pointed out, due to a preferential water adsorption in mesopores. Moreover a physisorption of α-endosulfan occurred in micropores. For steamed HBEA zeolites physisorption in micropores was pointed out as the adsorption mode. For both types of zeolites a decrease of the adsorption capacities was noticed when the acidity of zeolites increased. There was also a linear relation between the adsorption capacities of α-endosulfan and the hydrophobicity (HI) of the samples and by determining the values of HI for a type of zeolite it was possible to deduce the uptake of α-endosulfan. The HY(40) sample was the most efficient for the removal of α-endosulfan from water because of preferential adsorption of water molecules in mesopores and lower acidity. For this sample the adsorption capacity for α-endosulfan was about 833.33 mg/g where for the most effective HBEA sample (St700(3)) the adsorption capacity was about 793.65 mg/g. |
| Databáze: | OpenAIRE |
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