At last, the analysis methods of soil mercury forms and emission flux of vapor phase of mercury from soil are discussed.

最后，还介绍了土壤汞形态的分析方法以及土壤挥发性汞释放通量的测量方法。

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A pot experiment was conducted to study the effects of different humic acid materials on organic combined mercury and total mercury contents in soil and the biological availability of soil mercury.

通过盆栽试验研究了不同腐殖酸物质对土壤有机结合态汞、全汞含量及土壤汞生物有效性的影响。

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The toxic buildup of lead, mercury, and other heavy metals in the soil and water near coal plants and smelting factories is not usually measured.

火电厂和冶炼工厂附近的土和水中所溶解了来自于铅，汞及其他重金属的毒性物质，这些毒性物质通常很难测量。

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Approximately 1, 100 such units at more than 450 existing power plants emit 48 tons of mercury into the air each year, with 11 tons of that deposited on to U.S. soil and waters, says EPA. Those plants also release arsenic, lead and other heavy metals, all of which are considered hazardous and are therefore subject to clean air laws that require those facilities to use modern pollution controls.

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