Combined chemical oxidation and biological processes for herbicide degradation

被引：7
作者：
Benzaquen, Tamara B. [1 ]
Isla, Miguel A. [1 ,2 ]
Alfano, Orlando M. [1 ,2 ]
机构：
[1] INTEC UNL CONICET, Ruta Nacl 168, RA-3000 Santa Fe, Santa Fe, Argentina
[2] Univ Nacl Litoral, Dept Medio Ambiente, FICH, Ruta Nacl 168 Paraje El Pozo, RA-3000 Santa Fe, Santa Fe, Argentina
来源：
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2016年 / 91卷 / 03期
关键词：
advanced oxidation processes; photo-Fenton; biological treatment; combined process; biorecalcitrant compound; atrazine; PHOTOCATALYTIC DEGRADATION; CYANURIC ACID; PHOTO-FENTON; TRIAZINE HERBICIDES; AZO DYES; ATRAZINE; BIODEGRADATION; STRAIN; WATER; DETOXIFICATION;
D O I：
10.1002/jctb.4635
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
BACKGROUND: Fenton and photo-Fenton processes were explored as photochemical pre-treatments to improve the biodegradability of wastewater containing atrazine, a commercial pesticide. The effects of H2O2, Fe3+ and irradiation level on the degradation processes were studied and the optimal conditions determined. RESULTS: Fenton and photo-Fenton oxidation systems were able to remove 85 and 100% of atrazine, respectively, in a 120 min period. These processes produced a biocompatible solution, removing 100% of the initial biorecalcitrant compound; however, cyanuric acid remained in the effluent after the chemical oxidation treatment due to the stability of the N-heterocyclic ring of this acid. Nevertheless, it was found that the cyanuric acid remaining from the photo-oxidative process can be removed by means of an anaerobic treatment. CONCLUSIONS: The results obtained in this work indicate that a coupled photo-Fenton-biological treatment system is a feasible method to achieve the complete mineralization of biorecalcitrant pollutants such as atrazine. (C) 2015 Society of Chemical Industry
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页码：718 / 725
页数：8
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