Resolution of the Ongoing Challenge of Estimating Nonpoint Source Neonicotinoid Pollution in the Yangtze River Basin Using a Modified Mass Balance Approach
Resolution of the Ongoing Challenge of Estimating Nonpoint Source Neonicotinoid Pollution in the Yangtze River Basin Using a Modified Mass Balance Approach
复制标题
解决利用改进的质量平衡法估算长江流域面源新烟碱污染的持续挑战
DOI：
10.1021/acs.est.8b06096
复制
发表时间：
2019-03-05
影响因子：
11.4
通讯作者：
Zhao, Meirong
中科院分区：
文献类型：
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作者：
Chen, Yuanchen;Zang, Lu;Zhao, Meirong
新烟碱类杀虫剂在世界范围内广泛使用，特别是在中国。环境研究界对类烟碱的发生、命运、来源和风险越来越感兴趣。2016年长江流域沿着12个站点在枯水期和丰水期分别测定了9种烟碱类化合物，并采用改进的质量平衡法进行了非点源识别。一个显着更高的浓度的类烟碱被发现在旱季可能是由于稀释效应和杀虫剂消费。高污染水平是由于与建议的阈值相比，造成了高生态风险。2016年，1190吨（95%置信区间（CI）= 822-1690）类烟碱被转移到邻近海域。非点源污染（1700（CI = 12002370）吨）的主要贡献者（91.3%）的总输入到系统中的类烟碱。识别特定类烟碱来源的组成概况表明，从旧的类烟碱到新的类烟碱的使用模式发生了一些变化。这种空间和季节性的实地研究和来源鉴定有望填补关于类尼古丁使用模式的有限信息的数据空白，并为中国在不久的将来迫切需要推广的进一步有效的政策制定和干预计划提供信息。
Neonicotinoid insecticides have been widely consumed worldwide, particularly in China. There is a growing interest in the environmental research community about the occurrence, fates, sources, and risks of neonicotinoids. Nine neonicotinoids in river/lake water were measured at 12 sites along the Yangtze River Basin during the dry and wet seasons in 2016, and nonpoint sources were also identified based on a modified mass balance method. A significantly higher concentration of neonicotinoids was found during the dry season probably due to the dilution effect and insecticide consumption. The high pollution levels are due to posing high ecological risks compared with the recommended thresholds. In 2016, 1190 (95% confidence interval (CI) = 822-1690) tons of neonicotinoids were transferred into the adjacent sea. Nonpoint source pollution (1700 (CI = 12002370) tons) was the major contributor (91.3%) to the total input of neonicotinoids into the system. Composition profiles identifying specific neonicotinoid sources indicated some changes in usage patterns from old to new types of neonicotinoids. This spatial and seasonal field study and source identification is expected to fill the data gap regarding the limited information on neonicotinoid use patterns and to inform further effective policy-making and intervention programs in China that should be urgently promoted in the near future.