Removal of alachlor from water by catalyzed ozonation on Cu/Al2O3 honeycomb

Chemistry Central Journal

Haiyan Li¹  Yan Huang²  Shuang Cui¹ 

[1] Key Laboratory of Urban Stormwater System and Water Environment (Beijing University of Civil Engineering and Architecture), Ministry of Education, Beijing 100044, China

[2] Beijing Municipal Environmental Monitoring Centre, Beijing, 100048, China

关键词: Degradation;    Alachlor;    Catalytic ozonation;   

Others  :  787850
DOI  :  10.1186/1752-153X-7-143

 received in 2013-06-20, accepted in 2013-08-19,  发布年份 2013

【 摘 要 】

Background

The herbicide alachlor (2-chloro-2′6′-diethyl-N-methoxymethylacetanilide) has been known as a probable human carcinogen, and the MCL (minimum contamination level) for drinking water has been set at 2 μg L^-1. Therefore, the advanced methods for effectively removing it from water are a matter of interest. Catalyzed ozonation is a promising method for refractory organics degradation. Cu/Al₂O₃ catalyzed ozonation for degrading an endocrine disruptor (alachlor) in water was investigated.

Results

Experimental results showed that the ozonation of alachlor can be effectively catalyzed and enhanced by Cu/Al₂O₃-honeycomb. The main intermediate products formed (aliphatic carboxylic acids) were mineralized to a large extent in the catalytic process.

Conclusions

This study has shown that Cu/Al₂O₃-honeycomb is a feasible and efficient catalyst in the ozonation of alachlor in water. Less intermediate oxidation product was produced in the catalytic process than in the uncatalytic one. Furthermore, the mineralization of alachlor could be enhanced by increasing the pH of the reaction solution.

【 授权许可】

   
2013 Li et al.; licensee Chemistry Central Ltd.

【 图 表 】

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