土壤理化性质对重金属形态的影响

Influence of Soil Physical and Chemical Properties on Forms of Heavy Metals

近年来,重金属污染土壤的治理越来越受到关注,土壤理化性质对土壤中重金属的形态和生物有效性有着重要的影响。该文主要分析讨论了土壤p H值、氧化还原电位、有机质含量以及不同黏土矿物等理化性质对土壤中重金属形态的影响,归纳了不同因素导致土壤中重金属形态变化的作用机理,提出了土壤中重金属由生物可利用态转换为稳定态的方法,为降低土壤重金属污染提供了指导。

In recent years,more and more attention has been paid to treatment of heavy metal contaminated soil. Physical and chemical properties of soil has an important impact on morphology and bioavailability of heavy metals in soil. Effects of physical and chemical properties such as soil p H,redox potential,organic matter content and different clay minerals on speciation of heavy metals in soil were analyzed and discussed. Mechanism of change of speciation of heavy metals in soil caused by different factors was summarized. Transformation of heavy metals from bioavailable state to stable state in soil was put forward,which provided guidance for reducing heavy metal pollution in soil.