[Advances in research on in situ chemo-immobilization of heavy metals in contaminated soils].
In situ immobilization of heavy metals is a main method for decreasing the mobility and bioavailability of heavy metal ions through their immobilization by adding various amendments. Due to its easy operation and rapid efficiency, this method is becoming non-replaceable, especially for the remediation of non-point polluted arable soils. Natural materials and industrial by-products with high capacity of entrapping and fastening heavy metals, e. g., phosphorite, peat, lime, and organic fertilizers, can be obtained and employed, and the immobilization efficiency of these amendments as well as the environmental risk of the ionic leaching, releasing, and biological toxicity of heavy metals could be evaluated in laboratory and field. In this paper, the resources and types of the amendments were classified, and the possible immobilization mechanisms for the remediation of heavy metals- contaminated soils were discussed. The assessment methods of this remediation in laboratory and field were formulized, its limitation was analyzed, and further development directions were put forward.
Guo
Guanlin
G
Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China. guoguanlin09@yahoo.com.cn
Zhou
Qizing
Q
Li
Xiuying
X
D000327:Adsorption; D002104:Cadmium / Q000032:analysis / Q000737:chemistry; D002857:Chromium / Q000032:analysis / Q000737:chemistry; D004563:Electrochemistry; D004787:Environmental Pollution / Q000517:prevention & control*; D008628:Mercury / Q000032:analysis / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010539:Permeability; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
D019216:Metals, Heavy; D012989:Soil Pollutants; D002104:Cadmium; D002857:Chromium; D008628:Mercury