Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China.
Hebei Key Laboratory of Mineral Resources and Ecological Environment Monitoring, Hebei Research Center for Geoanalysis, Baoding, 071002, Hebei Province, People's Republic of China.
Sci Rep. 2022 Jul 14;12(1):12049. doi: 10.1038/s41598-022-16088-4.
Baiyang Lake is the largest freshwater lake in North China, playing an important role in aquatic products production and eco-environment improvement. Traditional organochlorine pesticides were not enough to reflect ecological risk. We performed the high-throughput and non-targeted screening to identify the high-residue and wide-distribution pesticides at farmland-river interlaced area. We firstly reported the residue level and spatio-temporal distribution of typical pesticides in soils and waters (SP1-SP13) near Fuhe river in 2020-2021. The mean recoveries of eight pesticides ranged from 79.4 to 129%. The residues were 0.250-3530 ng/L (water) and 2.79 × 10-647 μg/kg dw (soil), respectively. Thiamethoxam was dominant with the high-residue proportion (HRP) of 53-95% (water, HRP > 50%) and 63-97% (soil, HRP > 60%), respectively. Most of pesticides almost have no significant season-change. The risk quotient (RQ) model results showed that although most pesticides have no aquatic risk (RQ < 0.01), carbendazim and propionazole deserved attention. The individual thiamethoxam at nearly half of the sites exhibited high terrestrial risk (RQ, 1.070-1.682), while propiconazole was at medium risk (SP1, SP2, SP8, and SP9) and high risk (SP12). The RQ were in the range of 0.4541-3.327 (earthworm), 0.0239-0.4552 (algae), 0.1094-1.103 (aquatic invertabrates), and 0.1657-1.923 (fish), respectively, so co-residue caused joint toxic effect to aquatic invertebrates.
白洋淀是中国北方最大的淡水湖泊，在水产养殖和生态环境改善方面发挥着重要作用。传统的有机氯农药已不足以反映生态风险。我们采用高通量和非靶向筛选方法，在农田-河流交错区识别高残留、广泛分布的农药。我们首次报道了 2020 年至 2021 年府河附近土壤和水中（SP1-SP13）典型农药的残留水平和时空分布。8 种农药的平均回收率在 79.4%至 129%之间。残留量分别为水相 0.250-3530ng/L 和土壤相 2.79×10-647μg/kg dw。噻虫嗪的残留量最高，其高残留比例（HRP）在水相和土壤相中分别为 53-95%（HRP>50%）和 63-97%（HRP>60%）。大多数农药几乎没有明显的季节性变化。风险商（RQ）模型结果表明，尽管大多数农药没有水生风险（RQ<0.01），但多菌灵和丙环唑值得关注。近一半采样点的噻虫嗪个体表现出高的陆地风险（RQ，1.070-1.682），而丙环唑处于中等风险（SP1、SP2、SP8 和 SP9）和高风险（SP12）。RQ 在 0.4541-3.327（蚯蚓）、0.0239-0.4552（藻类）、0.1094-1.103（水生无脊椎动物）和 0.1657-1.923（鱼类）之间，因此共残留对水生无脊椎动物产生了联合毒性作用。
