兴凯湖,位于黑龙江省,是重要的渔业和农业基地,受到农业面源的严重污染。为明确兴凯湖地表水中多种农药的残留状况,27种农药,除草剂,并分析了它们在稻田中的降解产物,排水,在水稻抽穗和成熟期,兴凯湖(中国)周围的地表水。结果表明,所有27种农药,除草剂,在水稻抽穗期检测到它们的降解产物,总浓度范围为247.97至6094.49ng·L-1。此外,在水稻成熟期检测到25种,总浓度为485.36~796.23ng·L-1。相比之下,更多的杀虫剂,除草剂,在抽穗期间检测到衍生的降解产物,它们的总浓度也较高。在水稻抽穗期,阿特拉津,simetryn,多效唑是检测到的主要农药,阿特拉津和异丙硫醇是成熟期检测到的主要农药。兴凯湖周围地表水中农药和除草剂的分布特征与排水相似,所以它们可能是从排水和稻田进口的。阿特拉津的平均风险商(RQ)值,simetryn,Prometryn,丁草胺,异丙醇,排水和兴凯湖(中国)中的oxadiazon高于0.1,这显示了对水生生物的潜在风险。
Xingkai Lake, located in Heilongjiang Province, is an important fishery and agricultural base and is seriously polluted by agricultural non-point sources. To clarify the residual status of many pesticides in the surface water of Xingkai Lake, 27 types of pesticides, herbicides, and their degradation products were analyzed in rice paddy, drainage, and surface water around Xingkai Lake (China) during the rice heading and maturity periods. The results showed that all 27 types of pesticides, herbicides, and their degradation products were detected during the rice heading period, and the total concentration ranged from 247.97 to 6 094.49 ng·L-1. Additionally, 25 species were detected during the rice maturity period, and the total concentration ranged from 485.36 to 796.23 ng·L-1. In comparison, more pesticides, herbicides, and derived degradation products were detected during the heading period, and their total concentration was higher as well. During the rice heading period, atrazine, simetryn, and paclobutrazol were the main detected pesticides, atrazine and isoprothiolane were the main pesticides detected during the maturity period. The distribution characteristics of pesticides and herbicides in the surface water around Xingkai Lake (China) was similar to that in drainage, so they were probably imported from the drainage and rice paddy. The average risk quotient (RQ) values of atrazine, simetryn, prometryn, butachlor, isoprothiolane, and oxadiazon were higher than 0.1 in drainage and Xingkai Lake (China), which showed a potential risk to aquatic organisms.