太湖梅梁湾水体合成麝香的分布特征

Distribution of synthetic musk in surface water and sediments from Meiliang Bay,Taihu Lake

研究了7种合成麝香在太湖梅梁湾湖区的污染水平和分布特征,其中,佳乐麝香(HHCB)、吐纳麝香(AHTN)、二甲苯麝香(MX)和酮麝香(MK)的存在非常普遍,尤以HHCB为主.HHCB在表层水和沉积物中的浓度范围分别为0.34—1.39 ng·L-1和0.27—0.79 ng·g-1干重,MX和AHTN的浓度较低.湖区水体和沉积物中HHCB和AHTN的浓度比分别为3.8—16.9和5.5—136.1,高于邻近地区污水处理厂出水的比值.总体来说该湖区的合成麝香污染没有生态风险.

The distributions of 7 synthetic musks in surface water and sediments collected from the Meiliang Bay, Taihu Lake, in China, were investigated. Four major musks, including 8-hexahydro-4, 6, 6, 7, 8, 8-hexamethylcyclopenta-（ y ）-2：benzopyran （ galaxolide, ,3,4,6,7, HHCB ）, 7-acetyl- 1,1,3,4,4,6-hexamethyl- 1,2,3,4-tetrahydronaphthalene （ tonalide, AHTN ）, 1 -tert-butyl- 3, 5-dimethyl-2, 4, 6-trinitrobenzene （ musk xylene, MX） and 4-tert-butyl-2, 6-dimethyl-3, 5- dinitroacetophenone （musk ketone, MK）, were detected in most samples. HHCB was the dominant pollutant, and its concentrations ranged from 0.34 to 1.39 ng·L^-1 in water, and from 0.27 to 0.79 ng·g^-1 dry weight in sediments. The concentrations of MX and AHTN were low compared to those of HHCB. The concentration ratios values of HHCB to AHTN were calculated （from 3.8 to 16.9 in water, and from 5.5 to 136.1 in sediment samples） , which were higher than those in the effluents of wastewater treatment plants. There is no obvious ecological risk in the Meiliang Bay, according to the synthetic musk pollution levels.