Fang S C
Arch Environ Contam Toxicol. 1981;10(2):193-201. doi: 10.1007/BF01055621.
Mercury vapor sorption by soil increased curvilinearly with the increase of soil moisture content until a maximum was reached. A further increase of moisture content caused a decline in mercury sorption. The percent moisture contents which gave maximal increase of 203Hg vapor sorption in these soils coincide quite closely with their water-holding capacity values at 1/3 bar. Soil microorganisms may play a part in moist soil for the increase of elemental mercury vapor sorption and subsequent transformation to mercuric form. Mercury vapor diffused into both dry and moist soil columns and the diffusion profile can be described by an exponential function of the form, y = ae-bx, where "a" is the adsorption characteristics of the soil, "b" is the diffusivity coefficient and x is the depth of soil. The diffusivity coefficient for mercury vapor varied with the soil type and its moisture content.
土壤对汞蒸气的吸附量随土壤含水量的增加呈曲线上升，直至达到最大值。含水量进一步增加导致汞吸附量下降。使这些土壤中203Hg蒸气吸附量最大增幅的含水量百分比与它们在1/3巴压力下的持水量值非常接近。土壤微生物可能在潮湿土壤中对元素汞蒸气吸附的增加以及随后转化为汞形态的过程中发挥作用。汞蒸气扩散到干燥和潮湿的土壤柱中，其扩散剖面可用y = ae-bx形式的指数函数来描述，其中“a”是土壤的吸附特性，“b”是扩散系数，x是土壤深度。汞蒸气的扩散系数随土壤类型及其含水量而变化。
