PCBs in Lake Michigan water revisited

被引:85
作者
Pearson, RF
Hornbuckle, KC
Eisenreich, SJ
Swackhamer, DL
机构
[1] UNIV MINNESOTA,SCH PUBL HLTH,MINNEAPOLIS,MN 55455
[2] UNIV MINNESOTA,GRAY FRESHWATER BIOL INST,NAVARRE,MN 55392
关键词
D O I
10.1021/es940626n
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
PCBs were determined in water samples from 11 open water sites in Lake Michigan and compared to data from 1980. PCB concentrations declined from 1980 to 1991 with a first-order rate constant calculated to be -0.078 yr(-1). The most southern and southwesterly sites sampled were higher in concentration and exhibited different homolog profiles and partitioning behavior than samples from other sites, The organic carbon-normalized partition coefficients were not correlated to K-ow. A simple mass budget about the water column for 1991 using current measurements of PCB inputs and outputs shows a significant imbalance of PCBs and indicates the need for further study of the roles that subregional atmospheric deposition and sediment-water interactions play as sources to the lake.
引用
收藏
页码:1429 / 1436
页数:8
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