State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Environ Int. 2021 Jul;152:106500. doi: 10.1016/j.envint.2021.106500. Epub 2021 Mar 11.
Atrazine, a potent herbicide for weeds removal during the growing season, has been widely used in China. It is known to be distributed in aquatic ecosystems with a long half-life, thus presenting a potential risk to species and consumers. This study analyzed the concentrations of degraded atrazine residues in marine organisms (N = 129) including 3 species of mollusks, 2 species of crustaceans, and 15 species of fish from a semi-enclosed bay, Jiaozhou Bay (JZB), adjacent to the Northwest Pacific Ocean in China. The corresponding trophic magnification factors (TMF), bioaccumulation factors (BCFs), and subsequent risks to final consumers were also determined. The results showed an average atrazine concentration of (0.301 ± 0.03) ng g and (0.305 ± 0.04) ng g in fish and invertebrates, respectively. The BCFs were (5.23 ± 1.75) L kg and (5.81 ± 1.31) L kg for fish and invertebrates, respectively. Atrazine was significantly bio-diluted in JZB through the sampled marine organisms with increasing trophic levels, with a TMF value below 1 (P < 0.01). An analysis of the species sensitivity distribution (SSD) predicted that<0.02% of species were exposed to a dissolved concentration of atrazine (57.88 ng L) that would lead to detrimental effects, while risk quotients predicted low long-term risks for species in the bay. Finally, people with a diet limited to species from JZB were found to face no associated health risk due to a significantly small daily intake and target hazard quotient of atrazine. The corresponding non-carcinogenic effect showed no significant risk from seafood consumption.
莠去津是一种在生长季除草的高效除草剂，在中国被广泛使用。已知它在水生生态系统中分布广泛，半衰期长，因此对物种和消费者构成潜在风险。本研究分析了来自中国西北太平洋邻接半封闭海湾——胶州湾的 3 种贝类、2 种甲壳类和 15 种鱼类等 129 种海洋生物中降解莠去津残留的浓度。还测定了相应的营养放大因子（TMF）、生物积累系数（BCF）和对最终消费者的后续风险。结果表明，鱼类和无脊椎动物中莠去津的平均浓度分别为（0.301±0.03）ng g和（0.305±0.04）ng g。鱼类和无脊椎动物的 BCF 分别为（5.23±1.75）L kg和（5.81±1.31）L kg。通过对采样的海洋生物进行分析，发现莠去津在胶州湾中随着营养级的增加而显著被生物稀释，TMF 值低于 1（P<0.01）。物种敏感性分布（SSD）分析预测，<0.02%的物种暴露于可能产生有害影响的溶解浓度的莠去津（57.88ng L）中，而风险商预测海湾中物种面临的长期风险较低。最后，由于每日摄入量和莠去津的目标危害商明显较小，仅以胶州湾物种为食的人不会面临相关健康风险。非致癌效应的相应结果表明，食用海鲜不存在显著风险。
