【摘要】 采用固相微萃取(SPME)与气相色谱-质谱联用,分析了3种养殖模式鱼塘沉积物中氯酚类(CPs)化合物的污染特征。结果表明,一般四大家鱼养殖模式(A)沉积物中总CPs质量分数(干质量)为9.91ng·g-1,猪-鱼综合养殖模式(B)与鸭-鱼综合养殖模式(C)沉积物总CPs质量分数分别为7.79ng·g-1和4.84ng·g-1。总CPs及15种CPs化合物在A、B模式和鸭-鱼综合养殖模式(C)沉积物中的分布特征相似,质量分数由高到低的顺序为A模式,B模式,C模式。沉积物中质量分数比较高的一氯酚、二氯酚、三氯酚和四氯酚分别是4-CP、2,4-DCP、2,4,6-TCP和2,3,4,6-TeCP。五氯酚(PCP)质量分数与4-CP、2,5+2,6+3,5-DCP、3,4-DCP、2,4,5-TCP、2,3,6-TCP、2,3,4-TCP、2,3,5,6-TeCP、2,3,4,6-TeCP、2,3,4,5-TeCP等氯酚化合物质量分数显著正相关,显示PCP与它们之间存在降解物与产物的关系。参照美国EPA相关标准,上述鱼塘沉积物中的PCP和Ky氯酚(2,3,4,6-TeCP、2,4,6-TCP和PCP)导致生态风险的可能性较低。更多还原

【Abstract】 Concentration levels of chlorophenols(CPs) pollutants in aquiculture sediments were determined by solid phase microextraction(SPME) and gas chromatography-mass spectra(GC-MS).The investigated aquaculture models were traditional feeding(A),pig-fish compound aquaculture(B) and duck-fish compound aquaculture(C),which presented a similar distribution pattern of the total CPs and 15 individual CPs chemicals.Data showed that the total CPs concentrations were 9.91,7.79 and 4.84 ng·g-1 for model A,B,and C,respectively.Among all CPs,the major chlorophenol pollutants in the three sediments were 4-CP、2,4-DCP、2,4,6-TCP and 2,3,4,6-TeCP.It was observed that PCP has a positive correlation with 4-CP,2,5+2,6+3,5-DCP,3,4-DCP,2,4,5-TCP,2,3,6-TCP,2,3,4-TCP,2,3,5,6-TeCP,2,3,4,6-TeCP,or 2,3,4,5-TeCP,respectively,suggesting that those chemicals were intermediate products from PCP degradation.According to the evaluation system of USEPA,the residuary level of PCP and Ky-chlorophenols in the aquiculture sediments might pose low ecological risk to the environment and human beings.更多还原