History of mercury loading in the Upper Mississippi River reconstructed from the sediments of Lake Pepin

被引:48
作者
Balogh, SJ
Engstrom, DR
Almendinger, JE
Meyer, ML
Johnson, DK
机构
[1] Metropolitan Council Environm Serv, St Paul, MN 55106 USA
[2] Sci Museum Minnesota, St Croix Watershed Res Stn, Minneapolis, MN 55407 USA
关键词
D O I
10.1021/es9903328
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
An array of sediment cores was analyzed to determine historical trends in mercury (Hg) accumulation in Lake Pepin, a natural lake on the Upper Mississippi River. Whole-basin Hg accumulation rates increased from 3 kg/yr before European settlement (ca. 1830) to a maximum of 357 kg/yr in the 1960s. The recent Hg accumulation rate (110 kg/yr, 1990-1996) is experimentally indistinguishable from measured Hg loadings in the river entering the lake, indicating that accumulation rates in Lake Pepin correspond quantitatively to river loadings. The modern accumulation rate represents a decline of almost 70% from the peak value, reflecting large decreases in Hg inputs to the Mississippi River from industrial and municipal point sources in the metropolitan Minneapolis/St.Paul area upstream. A total of 18.1 t of Hg has been deposited in Lake Pepin since 1800; half of that (9.0 t) was deposited between 1940 and 1970, when regional growth accelerated rapidly but pollution control mechanisms were inadequate. Point sources accounted for approximately 60% of the Hg accumulating in Lake Pepin in the 1960s, but these inputs have been virtually eliminated since then.
引用
收藏
页码:3297 / 3302
页数:6
相关论文
共 41 条
[1]  
[Anonymous], 1984, LAKE SEDIMENTS ENV H
[2]   MERCURY PATHWAYS IN MUNICIPAL WASTE-WATER TREATMENT PLANTS [J].
BALOGH, S ;
LIANG, L .
WATER AIR AND SOIL POLLUTION, 1995, 80 (1-4) :1181-1190
[3]   Diffuse and point source mercury inputs to the Mississippi, Minnesota, and St. Croix Rivers [J].
Balogh, S ;
Meyer, M ;
Johnson, K .
SCIENCE OF THE TOTAL ENVIRONMENT, 1998, 213 (1-3) :109-113
[4]   Mercury and suspended sediment loadings in the lower Minnesota River [J].
Balogh, SJ ;
Meyer, ML ;
Johnson, DK .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (01) :198-202
[5]   Transport of mercury in three contrasting river basins [J].
Balogh, SJ ;
Meyer, ML ;
Johnson, DK .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (04) :456-462
[6]  
Bishop KH, 1997, MET IONS BIOL SYST, V34, P113
[7]   MERCURY ACCUMULATION IN YELLOW PERCH IN WISCONSIN SEEPAGE LAKES - RELATION TO LAKE CHARACTERISTICS [J].
COPE, WG ;
WIENER, JG ;
RADA, RG .
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 1990, 9 (07) :931-940
[8]   Recent declines in atmospheric mercury deposition in the upper Midwest [J].
Engstrom, DR ;
Swain, EB .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (04) :960-967
[9]  
ENGSTROM DR, 1994, ADV CHEM SER, V237, P33
[10]  
ENGSTROM DR, 1998, HIST CHANGES SEDIMEN