土壤中汞的吸附-解吸行为研究进展

A Review on the Studies on Mercury Adsorption-desorption Behavior in the Soil

汞(Hg)是环境中一种具有高度毒性的重金属元素,且具有较高挥发性,因而作为一种全球性的污染物而备受关注。土壤中汞的迁移、转化与汞在土壤中的吸附解吸行为密切相关。影响土壤中汞吸附解吸行为的因素有许多,主要包括:土壤汞形态、pH或Eh值、氯离子和竞争性阳离子、有机质和矿物质的类型与数量、土壤温度等等。系统地阐述了国内外对土壤汞吸附解吸行为及其影响因素的研究成果,并提出了未来研究的建议。

Mercury（Hg） is known as one of the five most toxic environment pollutants.Mercury（Hg） pollution has been widely recognized as a global environmental problem because of its volatility and toxicity.The fate and behavior of Hg in soil,which influences human health,is largely controlled by its adsorption and desorption reactions with various adsorbents.There are many environmental factors influencing Hg adsorption-desorption process,which include： Hg speciation,soil pH and Eh,chloride ions,organic matter content,form and content of soil colloids,and competitive inorganic ions,etc.The objective of this review is to summarize and update the current understanding of recent advancements in research on soil mercury adsorption-desorption process and its major factors.Finally,future research needs to better understand the adsorption-desorption behavior of soil mercury are recommended.