Degradation of Pesticides by Chlorination According to Their Basic Structures
Degradation of Pesticides by Chlorination According to Their Basic Structures
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根据农药的基本结构进行氯化降解
DOI：
10.2965/jswe.28.437
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Aizawa
中科院分区：
文献类型：
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作者：
Takako Arai;Motoyuki Kamata;D. Simazaki;M. Asami;T. Aizawa
被列为“日本水质管理目标设定补充项目”的101种农药根据其结构分为16组。研究了氯化过程中96种农药和5种氧化副产物的降解情况，以确定该净化工艺的潜力。含硫（S）的农药容易降解;在46种受检农药中，有38种农药在4小时后仅保留其原始浓度的50%或更少。另一方面，不含S的农药几乎没有降解;在50种受检农药中，有45种农药即使在24小时后仍保持其原始浓度的50%以上。因此，农药通过氯化降解的可能性可以通过其化学式中是否存在S来近似。含P=S的有机磷农药氧化副产物Oxons（P=O）几乎不被降解。因此，oxons可能会在氯化水中停留很长时间。
One hundred and one pesticides listed as “Complementary Items for Setting the Targets for Water Quality Management in Japan” were divided into 16 groups on the basis of their structures. The degradation of 96 pesticides and 5 oxidation by-products in chlorination was studied to determine the potential of the purification process. Pesticides containing sulfur (S) were easily degraded; for 38 pesticides out of 46 examined pesticides, only 50 % or less of their original concentration remained after 4 hours. On the other hand, pesticides without S were hardly degraded; for 45 pesticides out of 50 examined pesticides, more than 50 % of their original concentration remained even after 24 hours. Thus, the potential for degradation of the pesticides by chlorination can be approximated by the presence or absence of S in their chemical formulae. Oxons (P=O), which are oxidation by-products of organophosphate pesticides containing P=S, were hardly degraded. Therefore, oxons may remain in chlorinated water for a long time.