典型玉米种植小流域中乙草胺对水生生物的环境风险评估
Environmental Risk Assessment of Acetochlor on Aquatic Organisms in Typical Corn Planting Watersheds
黄怡 1韩兵 1肖晓峰 1王宝成 1王力明 1杨白驹 1于洋2
作者信息
- 1. 北京市污染源管理事务中心,北京 100089
- 2. 生态环境部固体废物与化学品管理技术中心,北京 100029
- 折叠
摘要
乙草胺是北京市主要粮食作物玉米的常用苗前除草剂,其在环境中的残留可能导致水生生物生存、生长和繁殖等方面的不利影响.为评估北京市某典型玉米农业小流域中乙草胺对水生生物的环境风险,本研究利用超高效液相色谱-串联质谱对地表水样品进行分析测试,获取乙草胺在水环境中的暴露浓度,利用水生生物毒性数据推算乙草胺的预测无效应浓度,并开展风险表征.结果表明,乙草胺在水环境中的浓度范围为ND～0.034 μg·L-1,即实测环境暴露浓度取0.034 μg·L-1.获得乙草胺对藻类、溞类、鱼类3个营养级水生生物的危害数据,推算出乙草胺的预测无效应浓度为0.052 μg·L-1.经风险表征发现,该区域乙草胺的使用对水生生物的风险可接受.
Abstract
Acetochlor is a commonly used pre-seedling herbicide for corn,a major grain crop in Beijing,potential-ly leaves residues in the environment and these residues have adverse effects on the survival,growth,and reproduc-tion of aquatic organisms.To assess the environmental risk of acetochlor to aquatic organisms in typical corn agri-cultural watershed in Beijing,this study used high-performance liquid chromatography and mass spectrometry to analyze surface water samples and obtained the concentration of acetochlor in aquatic environment.Besides,we used toxicity data to calculate the predicted no-effect concentration of acetochlor.Finally,the environmental risk was characterized.Findings revealed that the concentration of acetochlor in aquatic environment were in the range of ND～0.034 μg·L-1,and the measured environmental concentration of acetochlor was 0.034 μg·L-1.Based on toxicity data of acetochlor to aquatic organisms which include three trophic levels(algae,daphnia,and fish),we calculated that the predicted no-effect concentration of acetochlor was 0.052 μg·L-1.The risk assessment showed that the use of acetochlor in this area posed an acceptable risk to aquatic organisms.
关键词
乙草胺/风险评估/环境监测Key words
acetochlor/risk assessment/environmental monitoring引用本文复制引用
出版年
2024
NETL
NSTL
万方数据