Department of Environmental Science and Engineering, School of Life Science, Jinggangshan University, Ji'an, 343009, China.
Department of Environmental Science and Engineering, School of Life Science, Jinggangshan University, Ji'an, 343009, China.
Ecotoxicol Environ Saf. 2020 Apr 1;192:110289. doi: 10.1016/j.ecoenv.2020.110289. Epub 2020 Feb 12.
Comparatively limited knowledge is known about the accumulation processes of tributyltin (TBT) and triphenyltin (TPT) in fish and aquatic plant in the freshwater environment, which has hindered a full understanding of their bioaccumulation potential and ecological risks. In the present study, sorption of TBT and TPT on dead biota of both carp and C. demersum from water via the batch equilibrium technique as well as uptake of them on live biota of both carp and C. demersum from water at a static and a dynamic kinetics tests were investigated, respectively. Both TBT and TPT exhibit a high affinity in carps and C. demersum. And C. demersum has a faster metabolism either for TBT or TPT than carp. The apparent uptake values (C = 1904-8831 μg/kg) or bioconcentration factor (BCF = 3333-44000 L/kg) were one or two orders of magnitude higher than that of estimated by a simple sorption (405-472 μg/kg) or lipid model (74.5-149.6 μg/kg) for carp, indicating the uptake of TBT and TPT did not only depend on lipids but also oxygen ligands or macromolecules such as amino acids and proteins of the living organism. In contrast, the apparent C values (149.1-926.4 μg/kg) of both TBT and TPT were lower than that of estimated by sorption model (1341-1902 μg/kg) for C. demersum, which were due to the rapid metabolic rate of them, especially for TBT. But no relation was observed between TBT and TPT concentrations and lipid contents in C. demersum.
关于三丁基锡（TBT）和三苯基锡（TPT）在淡水环境中在鱼类和水生植物体内的积累过程，人们知之甚少，这阻碍了人们对其生物积累潜力和生态风险的全面了解。在本研究中，通过批量平衡技术研究了 TBT 和 TPT 通过水在鲤鱼和菹草的死亡生物量上的吸附，以及在静态和动态动力学测试中它们在鲤鱼和菹草的活体生物量上的吸收。TBT 和 TPT 都在鲤鱼和菹草中表现出很高的亲和力。并且 C. demersum 无论是对 TBT 还是 TPT 的新陈代谢速度都比鲤鱼快。表观吸收值（C = 1904-8831 μg/kg）或生物浓缩因子（BCF = 3333-44000 L/kg）比通过简单吸附（405-472 μg/kg）或脂质模型（74.5-149.6 μg/kg）预测的鲤鱼的值高出一个或两个数量级，这表明 TBT 和 TPT 的吸收不仅取决于脂质，还取决于氧配体或生物体内的大分子，如氨基酸和蛋白质。相比之下，TBT 和 TPT 的表观 C 值（149.1-926.4 μg/kg）都低于菹草中吸附模型（1341-1902 μg/kg）预测的值，这是由于它们的代谢速度很快，特别是对于 TBT。但在菹草中未观察到 TBT 和 TPT 浓度与脂质含量之间存在关系。
