Aquatic environment

Decomposition of alachlor by ozonation and its mechanism


LI Hai-yan , QU Jiu-hui , LIU Hui-juan

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Received August 25, 2006,Revised November 21, 2006, Accepted , Available online

Volume 19,2007,Pages 769-775

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Decomposition and corresponding mechanism of alachlor, an endocrine disruptor in water by ozonation were investigated. Results showed that alachlor could not be completely mineralized by ozone alone. Many intermediates and final products were formed during the process, including aromatic compounds, aliphatic carboxylic acids, and inorganic ions. In evoluting these products, some of them with weak polarity were qualitatively identified by GC-MS. The information of inorganic ions suggested that the dechlorination was the first and the fastest step in the ozonation of alachlor.

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