Abstract
In modern times where heavy metal pollution in soil is becoming more and more serious, the new natural non-polluting remediation methods represented by clay mineral materials have attracted more and more attention in the industry.In this paper, the research progress on the types and basic characteristics of clay mineral materials, the effect and mechanism of remediation of heavy metal pollution in soil at home and abroad was comprehensively discussed. The deficiencies of relevant studies were also summarized, and the future research trend was predicted.
Highlights
Clay mineral remediation is one of the hot methods for heavy metal pollution remediation in recent years
Basic properties including mineral surface adsorption clay mineral materials, structural adjustment, channel filtration, ion exchange, physical effect, chemical activity, nanometer effect and biological interactions (Lu, 2001), so the clay mineral materials besides has the general characteristics of environment mineral materials, have the function that repair environment, in the heavy
Surface charges of soil particles play an important role in the way of binding between pollutants and soil particles, and soil charges are mainly derived from clay mineral colloids (Zhuang et al, 2002).In the structural unit layer of clay minerals, Si4+ in the silicon-oxygen tetrahedron may be replaced by Al3+, and Al3+ in the octahedron may be replaced by Mg2+ and Fe2+
Summary
Clay mineral remediation is one of the hot methods for heavy metal pollution remediation in recent years.
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