Ma Mingbo, Dong Suozhuai, Jin Wanhui, Zhang Chongqi, Zhou Wenlong
a Department of Textile Materials , Zhejiang Sci-Tech University , Hangzhou , Zhejiang , China.
b Zhejiang Entry-Exit Inspection and Quarantine Bureau , Silk Inspection Center , Hangzhou , Zhejiang , China.
J Environ Sci Health B. 2019;54(1):70-75. doi: 10.1080/03601234.2018.1505036. Epub 2019 Jan 11.
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.
棉花纤维携带的农药对生产工人和消费者存在潜在风险。研究了常用棉花农药丙溴磷在棉花生长期间和精练处理过程中在棉花纤维中的消散行为。结果表明，施药后21天，已开棉铃和未开棉铃纤维中的丙溴磷均降至检测不到的水平。然而，少数丙溴磷转化为一种强刺激性化合物4-溴-2-氯苯酚，即使在28天后仍在棉花纤维中保留了不可忽略的量。在传统的棉花精练过程中，丙溴磷及其降解产物可以被完全去除。丙溴磷在精练浴中的降解半衰期仅为3.0分钟，降解产物也是4-溴-2-氯苯酚。由携带丙溴磷的纤维制成的棉制品是安全的；然而，由于精练浴中4-溴-2-氯苯酚的积累，精练废水在排放前应进行解毒处理。这些结果有助于评估来自施用丙溴磷田地的棉花纤维的风险。
