The use of clays to sequestrate organic pollutants. Leaching experiments.
V Gianotti, M Benzi, G Croce, P Frascarolo, F Gosetti, E Mazzucco, M Bottaro, M C Gennaro
Index: Chemosphere 73(11) , 1731-6, (2008)
Full Text: HTML
Abstract
Leaching experiments are performed from clay-pollutant systems in order to evaluate the capability of clays to sequestrate organic pollutants from wastewaters. Reference kaolinite KGa-1b, montmorrillonite SWy-2 and reference soil BCR-700 are the sorbent materials. 2,4,6-trichloroaniline (2,4,6-TCA) and 4-chlorophenol (4-CP) are the typical pollutants, sorbed at amounts of 10.0 mg g(-1) and 5.8 mg g(-1) on SWy-2 and 7.3 mg g(-1) and 2.2 mg g(-1) on KGa-1b, respectively. The leaching agents are ultrapure water and model solutions of acid rain and surface waters that simulate meteoric leaching. 1.0mM HNO(3), 1.0mM H(2)SO(4) solutions and a methanol/water 50/50 (v/v) mixture simulate leaching agents of industrial source. The results are compared and the preferential capability of the clays to sequestrate the more lipophilic 2,4,6-TCA is evidenced. The bond interactions are discussed and explained through preferential adsorption reactions. For montmorrillonite also a simultaneous intercalation in the phyllosilicate interlayer is proposed.
Related Compounds
Related Articles:
[Hygienic standardization of trichloroaniline in reservoir water].
1985-03-01
[Gig. Sanit. (3) , 83-4, (1985)]
[Study on method of sampling and analysis of trichloroaniline in the air].
1998-03-01
[Wei Sheng Yan Jiu 27(2) , 87-9, (1998)]
1997-05-08
[Biochem. Biophys. Res. Commun. 234(1) , 117-20, (1997)]
1996-03-01
[Bull. Environ. Contam. Toxicol. 56(3) , 343-50, (1996)]
2005-12-01
[Bull. Environ. Contam. Toxicol. 75(6) , 1055-9, (2005)]