太湖水体中丁基锡化合物污染现状研究

对太湖表层水、沉积物和水生生物样品的丁基锡污染物进行了研究.结果表明,绝大多数表层水样中未检出丁基锡化合物;沉积物样品中丁基锡的检出率为50%,浓度在0～0.95ng/g范围内,主要以一丁基锡为主;生物样品中检测到较高含量的丁基锡污染物,总丁基锡浓度为27.05～181.23 ng/g,这反映丁基锡具有明显的生物富集效应.生物样品中三丁基锡是主要污染物,大约占总丁基锡含量的70%.太湖中丁基锡的污染来源可能主要来自养殖网箱和船舶防污涂料的使用.

Study on the Contamination Status of Butyltins in Taihu Lake

Butyltins in surface water, sediments and biota samples from Taihu Lake were determined. The results show that butyltins content in most of the surface water samples is under the limit of the detection; five out of ten sediment samples are measured detectable butyltins. Monobutyltin (MBT) was the main species with the concentrations ranging from below the detection limits to 0.95 ng/g; while all biota samples were detected relatively higher butyltin concentrations with a range of 27.05 - 181.23 ng/g due to the obvious bioaccumulation. Tributyltin (TBT) was the main composition that occupied almost 70% of the total butyltins. The antifouling paints applied on the aquatic cultural box and boats was the possible main source of butyltin compounds in Taihu Lake.