Remediation of alachlor and atrazine contaminated water with zero-valent iron nanoparticles

Autor:	Achintya N. Bezbaruah, Jay M. Thompson, Bret J. Chisholm
Rok vydání:	2009
Předmět:	Zerovalent iron Iron filings Herbicides Environmental remediation Iron Alachlor Metal Nanoparticles General Medicine Pesticide Pollution Anoxic waters Kinetics chemistry.chemical_compound chemistry Environmental chemistry Acetamides Atrazine Water pollution Oxidation-Reduction Environmental Restoration and Remediation Water Pollutants Chemical Food Science
Zdroj:	Journal of Environmental Science and Health, Part B. 44:518-524
ISSN:	1532-4109 0360-1234
Popis:	Zero-valent iron nanoparticles (nZVI, diameter90 nm, specific surface area = 25 m(2) g(-1)) have been used under anoxic conditions for the remediation of pesticides alachlor and atrazine in water. While alachlor (10, 20, 40 mg L(-1)) was reduced by 92-96% within 72 h, no degradation of atrazine was observed. The alachlor degradation reaction was found to obey first-order kinetics very closely. The reaction rate (35.5 x 10(-3)-43.0 x 10(-3) h(-1)) increased with increasing alachlor concentration. The results are in conformity with other researchers who worked on these pesticides but mostly with micro ZVI and iron filings. This is for the first time that alachlor has been degraded under reductive environment using nZVI. The authors contend that nZVI may prove to be a simple method for on-site treatment of high concentration pesticide rinse water (100 mg L(-1)) and for use in flooring materials in pesticide filling and storage stations.
Databáze:	OpenAIRE
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