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首页> 外文期刊>Journal of the American Water Resources Association >DISSOLVED HEAVY METALS IN SHALLOW GROUND WATER IN A SOUTHEASTERN MICHIGAN URBAN WATERSHED
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DISSOLVED HEAVY METALS IN SHALLOW GROUND WATER IN A SOUTHEASTERN MICHIGAN URBAN WATERSHED

机译：东南密歇根州城市流域浅层地下水中溶解的重金属

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摘要

The occurrence of dissolved heavy metal concentrations in shallow ground water were measured at 126 sites within an urban watershed in southeastern Michigan. A total of 1,140 samples were collected from the first saturated zone, and the mean concentrations of 11 heavy metals (arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, and zinc) were obtained and compared to their corresponding mean concentrations within surface soil. The results suggest that former and current land use processes have resulted in significant adverse impacts on the study region. Levels of Cr 20 to 30 times the maximum contaminant level (MCL) have been detected in the ground water beneath industrial sites. In addition, Cd and Pb have been found at levels exceeding their MCLs where surface soils are clay-rich, and in sandy soils at more than 10 times their MCLs. The high levels of Cr in ground water strongly suggest that the chromium is in a hexavalent form, and this likelihood is supported by current studies. Given the hydraulic connection between the watershed's surface waters and the Great Lakes, these findings raise significant ecological and public health concerns.
机译：在密歇根州东南部的一个城市流域内的126个地点测量了浅层地下水中溶解的重金属浓度的发生。从第一个饱和区总共收集了1,140个样品，并获得了11种重金属（砷，钡，镉，铬，铜，铅，汞，镍，硒，银和锌）的平均浓度，并与之比较。它们在表层土壤中的相应平均浓度。结果表明，以前和当前的土地使用过程已对研究区域造成了重大不利影响。在工业场所下方的地下水中检测到的铬含量为最大污染物含量（MCL）的20至30倍。此外，发现Cd和Pb的含量超过其MCL（表层土壤富含粘土），而在沙质土壤中的含量超过其MCL十倍。地下水中高含量的Cr强烈表明铬呈六价形式，这种可能性得到了当前研究的支持。考虑到流域地表水和五大湖之间的水力联系，这些发现引起了重大的生态和公共健康问题。

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