Download PDF by Ralf Ebinghaus, Ralph R. Turner, Luiz D. de Lacerda, O.: Mercury Contaminated Sites: Characterization, Risk

By Ralf Ebinghaus, Ralph R. Turner, Luiz D. de Lacerda, O. Vasiliev, Wim Salomons

ISBN-10: 3642083544

ISBN-13: 9783642083549

ISBN-10: 3662037548

ISBN-13: 9783662037546

Mercury is phenomenal one of the international environmental pollution of constant th hindrance. specifically within the final decade of the 20 century, environmental scientists, legislators, politicians, and the general public became extra conscious of mercury pollu­ tion within the international atmosphere. It has frequently been advised that anthropogenic emissions are resulting in a common elevate in mercury on neighborhood, nearby, and glo­ bal scales. quite a few commercial actions, together with the mining of gold, silver, and mercury itself, have triggered mercury illness of terrestrial and aquatic eco­ platforms. Mercury-contaminated websites are plentiful around the globe. Mercury has been gathered as an "industrial legacy" within the rocks, soils, and sediments at, and adjoining to, commercial websites and now could pose major hazards to human and eco­ logical wellbeing and fitness. Direct inputs of mercury into the surroundings through commercial activi­ ties have typically reduced considerably within the Western international over the last 3 a long time. notwithstanding, resources corresponding to coal combustion and using mercury in gold and silver mining stay of significance on an international scale. a similar is right for diffuse resources resembling terrestrial landscapes which were impacted by means of mer­ cury inputs from the ambience long ago. Soils (and crops) positioned with reference to huge atmospheric mercury resources have essentially been sinks whereas those resources have been energetic some time past. in the end, notwithstanding, those soils could have turn into very important diffuse sector resources after the unique emissions have been discontinued.

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Additional resources for Mercury Contaminated Sites: Characterization, Risk Assessment and Remediation

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1996). In Siberia, industries emitting mercury and mercury-containing compounds can be divided into three main groups. The first group contains plants of the nonferrous metallurgical industry which produce metallic mercury directly from mercury ores and ore concentrates and from recycled mercury-containing products. The second group comprises mainly plants from chemical, electronic, and electrical industries where mercury is one of the elements in the manufacturing process. The major mercury consumers in the chemical industry are chlorine and caustic soda plants and manufacturers of various mercury compounds for other industries such as mercury oxides and fungicides for agriculture.

1995). This matches with observations in Pallette Lake, Wisconsin, where it was also found that Hg(o) concentrations are highest in the epilimnion and decrease with depth through the thermocline and the hypolimnion (Vandal et al. 1995); this observation was taken as an indication that Hg reduction occurs only in the mixed layer (Porcella 1994). Finally, in wind-sheltered parts of the lake, the Hg( 0) concentrations in the epilimnion were elevated compared to wind-exposed regions. This finding strongly suggests that wind is an important driving force behind gas exchange at the lake surface; thus, Hg fluxes to the atmosphere are temporarily increased by windy conditions and waves.

The reason for this seems to be that soil particles are fairly coarse (10 pm) and although they might be resuspended by wind, they will settle quickly and generally not be transported very far in the atmosphere. S pg m -3 in ambient air, which is 3 orders of magnitude lower than total gaseous Hg in background air (Ebinghaus et al. 1995). This also indicates that particulate emission ofHg from mineralized soils to the atmosphere is not likely to be a major source of atmospheric Hg and is much less important than gaseous emission.

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Mercury Contaminated Sites: Characterization, Risk Assessment and Remediation by Ralf Ebinghaus, Ralph R. Turner, Luiz D. de Lacerda, O. Vasiliev, Wim Salomons

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