| The environmental problems of heavy metals in soils have been received wide attention. However, there are still several issues need to be addressed and effectively managed in the studies of the soil environmental quality affected by heavy metals. To fully understand the concept of soil environmental quality, the background condition, the invasion and accumulation of exogenous substance, and the consequence of pollution, in addition to the soil pollution status need to be involved. The distinction between the concepts of soil contamination and soil pollution need to be clarified. There are some problems in establishment and development of soil environmental quality standards need to be aware of: 1.The appropriate evaluation and reference value of soil environmental quality assessment need to be selected; 2.The complexity and spatial variability of soils need to be reflected by adapting to location conditions; 3.The background value can only be used for cumulative assessment of chemicals; 4.The presence of heavy metals in soil is ubiquitous, and the single-faceted evaluation should be avoided. |
