Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modified silicates and porous glass as adsorbents for removal of organic pollutants from water and comparison with activated carbons
AbstractIt is demonstrated that a variety of modified silicate mineral sorbents can be utilized for the removal of organic pollutants from a water suspension or by a filter. Column filters filled with a mixture of quartz sand and organic micelle–montmorillonite (100:1 w/w) or zeolite were constructed. The micelle–clay filter removed 91% of ethylene dibromide (EDB) from an initial solution of 0.2 μg/L and 99.9% of the anionic pollutants sulfosulfuron, imazaquin, sulfentrazone and the neutral bromacil and chlorotoluron from an initial solution of 10 ppm. In contrast a filter filled with activated carbon at the same weight of the organic cation and sand, or without sand removed between 47.6% and 79% of these pollutants. Comparative capacity measurements yielded removal of sulfentrazone (75 ppm initial) at weights corresponding to 18.7% and 5.5% of the weights of the organic cation or activated carbon in the filter, respectively. For the antibiotic trimethoprim the micelle–clay system was not efficient; the clay mineral montmorillonite and the zeolite clinoptilolite yielded respectively 80% and 99.9% removal from its dispersion. A clinoptilolite/sand filter gave 91% removal. We also present varying degrees of efficiencies of removal of isoproturon, benzoic acid, and 1,2 dichlorobenzene by an organo-clay and by silica (controlled pore glass (CPG))-polycation immobilized micelles (SPIM) or without immobilized micelles.
Modified silicates and porous glass as adsorbents for removal of organic pollutants from water and comparison with activated carbons
AbstractIt is demonstrated that a variety of modified silicate mineral sorbents can be utilized for the removal of organic pollutants from a water suspension or by a filter. Column filters filled with a mixture of quartz sand and organic micelle–montmorillonite (100:1 w/w) or zeolite were constructed. The micelle–clay filter removed 91% of ethylene dibromide (EDB) from an initial solution of 0.2 μg/L and 99.9% of the anionic pollutants sulfosulfuron, imazaquin, sulfentrazone and the neutral bromacil and chlorotoluron from an initial solution of 10 ppm. In contrast a filter filled with activated carbon at the same weight of the organic cation and sand, or without sand removed between 47.6% and 79% of these pollutants. Comparative capacity measurements yielded removal of sulfentrazone (75 ppm initial) at weights corresponding to 18.7% and 5.5% of the weights of the organic cation or activated carbon in the filter, respectively. For the antibiotic trimethoprim the micelle–clay system was not efficient; the clay mineral montmorillonite and the zeolite clinoptilolite yielded respectively 80% and 99.9% removal from its dispersion. A clinoptilolite/sand filter gave 91% removal. We also present varying degrees of efficiencies of removal of isoproturon, benzoic acid, and 1,2 dichlorobenzene by an organo-clay and by silica (controlled pore glass (CPG))-polycation immobilized micelles (SPIM) or without immobilized micelles.
Modified silicates and porous glass as adsorbents for removal of organic pollutants from water and comparison with activated carbons
Zadaka, D. (Autor:in) / Mishael, Y.G. (Autor:in) / Polubesova, T. (Autor:in) / Serban, C. (Autor:in) / Nir, S. (Autor:in)
Applied Clay Science ; 36 ; 174-181
07.04.2006
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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