MERCURY ACCUMULATION IN SEDIMENT AND FISH FROM RIVERS AFFECTED BY ALLUVIAL GOLD MINING IN THE BRAZILIAN MADEIRA RIVER BASIN, AMAZON

被引：22

作者：

REUTHER, R

机构：

[1] Environmental Research Group (MFG), Teningen, D-79331

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 1994年 / 32卷 / 03期

关键词：

D O I：

10.1007/BF00546279

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The degree and distribution of mercury (Hg) accumulation in sediment and fish from a tributary affected by alluvial small-scale gold mining in the Madeira River/Amazon is studied, in relation to a reference site. The results obtained so far agree well with previous studies and confirm that a tremendous contamination of main food web compartments occurs in these highly exposed, but vulnerable tropical waters. An essential part of the released metallic Hg may still exist as macroscopic liquid Hg drops in the sediment. Both global (0.4 mg/kg of Hg) and local (0.1 mg/kg of Hg) background sediment values as well as safety levels for fish (0.5 mg/kg of Hg) are considerably exceeded by a factor of up to 25, 100, and 4, respectively, and give rise to serious concern, not least with regard to the formation of the very toxic monomethyl-Hg. It is further discussed that atmospheric transport and deposition of Hg in water reservoirs built for hydroelectric power generation may act as critical pathways for longterm Hg accumulation, even in unexposed riverine systems.

引用

页码：239 / 258

页数：20

共 24 条

[1]

Agemian H., Cheaner V., Simultaneous Extraction of Mercury and Arsenic from Fish Tissue and an Automated Determination by Atomic Absorption Spectrometry, Anal. Chem. Acta, 101, pp. 193-197, (1978)

[2]

Bisogni J.J., Lawrence A.W., Kinetics of Microbially Mediated Methylation of Mercury in Aerobic and Anaerobic Aquatic Environments, (1973)

[3]

Bubb J.M., Rudd T., Lester J.N., Distribution of Heavy Metals in the River Yare and its Associated Broads. I. Mercury and Methylmercury, Sci. Total Environ., 102, pp. 147-168, (1991)

[4]

Duarte A.C., Pereira M.E., Oliveira J.P., Hall A., Mercury Desorption from Contaminated Sediments, Water, Air and Soil Pollut., 56, pp. 77-8215, (1991)

[5]

Hakanson L., Andersson P., Andersson T., Bengtsson A., Grahn P., Johansson J.A., Jonsson C.P., Kvarnas H., Lindgren G., Nilsson A., Measures to Reduce Mercury in Lake Fish, Swedish EPA Rep., 3818, (1990)

[6]

Iskander I.K., Syers J.K., Jacobs L.W., Keemey D.R., Gilmour J.T., Determination of Total Mercury in Sediments and Soils, The Analyst, 97, pp. 388-393, (1972)

[7]

Jackson T.A., Kipphut G., Hesslein R.H., Schindler D.W., Experimental Study of Trace Metal Chemistry in Soft Water Lakes at Different pH Levels, Canadian Journal of Fisheries and Aquatic Sciences, 37, pp. 387-402, (1980)

[8]

Jernelov A., Lann H., Studies in Sweden on Feasibility of Some Methods for Restoration of Mercury-contaminated Bodies of Water, Environ. Sci. and Technol., 7, pp. 712-718, (1973)

[9]

Jernelov A., Ramel C., Mercury in the Environment, AMBIO, 23, (1994)

[10]

Kudo A., Miyahera S., A Case History

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