The Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, 266003, People's Republic of China.
Hainan Provincial Key Laboratory of Tropical Maricultural Technology, Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan, 571126, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Jun;30(30):76246-76252. doi: 10.1007/s11356-023-28064-0. Epub 2023 Jun 8.
Synthetic pyrethroid insecticides (SPIs) are frequently detected in water bodies and sediments, and they show high toxicity to aquatic organisms, but their toxicity kinetics remain unknown. In this work, the kinetics of uptake and depuration of three SPIs, fenpropathrin (FP), cypermethrin (CM) and deltamethrin (DM) were evaluated in manila clams (Ruditapes philippinarum) for the first time through a bioconcentration-semi-static test. Clams were exposed to three SPIs of different concentrations (2 ng/mL and 20 ng/mL) for 4 days, followed by a 10-day depuration stage. The results indicated that adult manila clams could absorb SPIs rapidly, and the bioconcentration factor (BCF) values of SPIs were different at high and low concentrations of contaminants. The depuration rate constants (k) of SPIs in adult manila clams ranged from 0.024 h to 0.037 h. The bioaccumulation factors ranged from 319.41 to 574.38. And the half-lives (t) were in the range of 18.49 to 29.22 h. These results showed that manila clams have a high bioconcentration capacity, and SPIs have a high cumulative risk for bivalves. Moreover, after 10 days of elimination, SPIs can still be detected in manila clams at all concentrations, indicating that the complete elimination of SPIs required a longer time.
合成拟除虫菊酯类杀虫剂（SPIs）经常在水体和沉积物中被检测到，对水生生物具有很高的毒性，但它们的毒性动力学仍不清楚。在这项工作中，首次通过生物浓缩-半静态试验评估了三种 SPIs（百菌清、氯菊酯和溴氰菊酯）在菲律宾蛤仔（Ruditapes philippinarum）中的吸收和消除动力学。蛤仔暴露于三种不同浓度（2ng/mL 和 20ng/mL）的 SPIs 中 4 天，然后进行 10 天的消除阶段。结果表明，成年菲律宾蛤仔能够快速吸收 SPIs，SPIs 在高浓度和低浓度污染物下的生物浓缩因子（BCF）值不同。SPIs 在成年菲律宾蛤仔中的消除率常数（k）范围为 0.024 h 至 0.037 h。生物积累因子范围为 319.41 至 574.38。半衰期（t）范围为 18.49 至 29.22 h。这些结果表明，菲律宾蛤仔具有较高的生物浓缩能力，SPIs 对双壳类动物具有较高的累积风险。此外，在 10 天的消除后，所有浓度的菲律宾蛤仔仍能检测到 SPIs，表明 SPIs 的完全消除需要更长的时间。
