Fate of the organophosphorus pesticide profenofos in cotton fiber |
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Authors: | Mingbo Ma Suozhuai Dong Wanhui Jin Chongqi Zhang |
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Institution: | 1. Department of Textile Materials, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China;2. Zhejiang Entry-Exit Inspection and Quarantine Bureau, Silk Inspection Center, Hangzhou, Zhejiang, China;3. Hubei Province Fibre Inspection Bureau, Wuhan, Hubei, China |
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Abstract: | Pesticides carried by cotton fiber are potential risk for production workers and consumers. Dissipation behaviour of a commonly used cotton pesticide profenofos in cotton fiber during growing period and scouring treatment was investigated. The results showed that profenofos in the fiber from the pre-opened and post-opened bolls both decreased to undetectable amounts 21?days after pesticide application. However, a minority of profenofos was converted to a strongly irritant compound, 4-bromo-2-chlorophenol and retained a non-negligible amount in cotton fiber even after 28?days. Profenofos and its degradation product could be completely removed during the conventional cotton scouring process. The degradation half-time of profenofos in scouring bath was only 3.0?min, and the degradation product was also 4-bromo-2-chlorophenol. Cotton products made of profenofos-carrying fiber are safe; however, the scouring waste should be detoxicated before discharge due to the accumulation of 4-bromo-2-chlorophenol in the scouring bath. These results could be useful for evaluating the risk of cotton fiber from the profenofos applied fields. |
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Keywords: | 4-Bromo-2-chlorophenol cotton fiber dissipation pesticides profenofos residue |
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