Abstract：In order to understand the pollution of butyltins (BTs, sum of monobutyltin (MBT), dibutyltin (DBT) and tributyltin (TBT)) in the dredged materials from the Bohai Sea, four dredging projects around the Bohai Sea were selected. The extraction conditions of BTs in sediment were optimized by single variable method, and then the BTs in the dredged materials were analyzed. The results showed that the optimal conditions for extracting BTs in dredged materials were the addition of 4.50g of activated copper powder, dichloromethane/dichloroethane (V:V=1:1) mixed extractant and 0.5% tropolone solution. TBT, DBT and MBT were detected in the dredged materials from the Bohai Sea. Their contents ranged from 2.93 to 7.96, 1.07 to 2.27 and 4.99 to 9.00ng·Sn/g (calculated by dry weight, the same below) respectively. In most dredging projects, the spatial distribution of TBT generally showed a trend of higher content closer to the coast, BTs content was at a low level compared to research in other countries and regions, and TBT were historical input. The ecological risk assessment results showed that the ecological risks of TBT in dredged materials from the Bohai Sea were at a low level. However, according to the management recommendations for the ocean dumping of dredged materials by international conventions, it was necessary to continue pay attention to or control the ocean dumping of dredged materials in the study area.
孔令娜, 项庆新, 王晓萌, 陈虹, 王新新, 韩建波, 姚远, 张乃东. 渤海疏浚物中丁基锡提取方法优化及其分布特征[J]. 中国环境科学, 2023, 43(2): 886-895.
KONG Ling-na, XIANG Qing-xin, WANG Xiao-meng, CHEN Hong, WANG Xin-xin, HAN Jian-bo, YAO Yuan, ZHANG Nai-dong. Optimization of extraction and distribution characteristics of butyltins in dredged materials from the Bohai Sea. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(2): 886-895.
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