Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing, 400045, China.
Environ Sci Pollut Res Int. 2018 Jan;25(2):1731-1741. doi: 10.1007/s11356-017-0585-y. Epub 2017 Nov 3.
Organotins (OTs) pollution in the aquatic environment of the Three Gorges Reservoir (TGR) was assessed during the reservoir's operating cycle. Butyltins (BTs) and phenyltins (PhTs) in the water phase and suspended particulate matter (SPM) at different water levels were analysed. It was found that the distribution of OTs in the surface and bottom water phases were similar, with the dominant OTs being BTs at the low water level and PhTs at the high water level. The detection rates and concentrations of OTs in the water phase at the high water level were both higher than those at the low water level, with most OTs being monobutyltin (MBT) at the low water level and monophenyltin (MPhT) at the high water level. The concentrations of OTs in SPM at the low water level were higher than those at the high water level, and BTs, especially dibutyltin (DBT) and tributyltin (TBT), were the predominant OTs whether surface or bottom layer at each water level. The BTs and SPM concentrations had a significant positive relationship in all samples, indicating that the SPM concentration would determine the distribution of BTs in the aquatic environment of the TGR region (TGRR). The difference in the distribution of OTs at the different water levels indicated that the hydrological and hydraulic behaviour of the TGR influences OTs transport in the aquatic environment of the TGRR.
在三峡水库运行周期内评估了三峡水库水域的有机锡（OTs）污染。分析了水相和不同水位悬浮颗粒物（SPM）中的丁基锡（BTs）和苯基锡（PhTs）。结果表明，OTs 在表底水相中分布相似，低水位时以 BTs 为主，高水位时以 PhTs 为主。高水位时水相 OTs 的检出率和浓度均高于低水位，低水位时以单丁基锡（MBT）为主，高水位时以单苯基锡（MPhT）为主。低水位时 SPM 中 OTs 的浓度高于高水位，BTs，特别是二丁基锡（DBT）和三丁基锡（TBT），在每个水位的表层和底层均为主要 OTs。所有样品中 BTs 和 SPM 浓度均呈显著正相关，表明 SPM 浓度将决定 TGR 地区（TGRR）水生态环境中 BTs 的分布。不同水位 OTs 分布的差异表明，三峡水库的水文和水力行为影响 OTs 在 TGRR 水生态环境中的传输。
