School of Life Science, Qufu Normal University, Qufu 273165, PR China.
School of Life Science, Qufu Normal University, Qufu 273165, PR China.
Sci Total Environ. 2023 Apr 20;870:161872. doi: 10.1016/j.scitotenv.2023.161872. Epub 2023 Jan 27.
This study systematically investigated the occurrence, spatiotemporal distribution, and ecological risk of 106 pesticides in the surface water of the Jiaodong Peninsula in China. The results show that 52 pesticides, including 21 insecticides, 10 fungicides, and 21 herbicides, were detectable in the surface water. The concentrations of target pesticides in water samples ranged from 0.42 (tebuconazole in the wet season) to 645.31 ng/L (thiamethoxam in the normal season). The two most polluting and widespread pesticides were quintozene (maximum concentration of 481.46 ng/L and detection rate of 94 %) and atrazine (maximum concentration of 465.73 ng/L and detection rate of 100 %). The total pesticide concentrations in surface water in different seasons revealed the order of dry season > wet season > normal season. Based on aquatic pesticide concentrations, their frequency of occurrence, and effect concentrations, insecticides posed higher risks to aquatic organisms and human health than either fungicides or herbicides. Total pesticide concentrations were significantly positively correlated with suspended particulate matter, dissolved organic carbon, soil pH, normalized difference vegetation index, adjacent cropland area; and were negatively associated with adjacent grassland area. The cropland area largely influences pesticide distribution in the surface water of the Jiaodong Peninsula.
本研究系统调查了中国胶东半岛地表水 106 种农药的发生、时空分布及生态风险。结果表明，在地表水中共检测到 52 种农药，包括 21 种杀虫剂、10 种杀菌剂和 21 种除草剂。水样中目标农药的浓度范围为 0.42（戊菌唑，雨季）至 645.31ng/L（噻虫嗪，正常季）。两种污染最严重、分布最广的农药为五氯硝基苯（最高浓度 481.46ng/L，检出率 94%）和莠去津（最高浓度 465.73ng/L，检出率 100%）。不同季节地表水总农药浓度表现为旱季>雨季>正常季。基于水体农药浓度、出现频率和效应浓度，杀虫剂对水生生物和人类健康的风险高于杀菌剂或除草剂。总农药浓度与悬浮颗粒物、溶解有机碳、土壤 pH 值、归一化差异植被指数、相邻耕地面积呈显著正相关，与相邻草地面积呈显著负相关。耕地面积对胶东半岛地表水农药分布有很大影响。
