Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (1): 240-246.doi: 10.13278/j.cnki.jjuese.20190155

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Remediation Effect of Modified Mg(OH)2 on Soil Contaminated by Multiple Heavy Metals

Zhao Wenjin, Gao Miao, Lu Haojie, Ren Liming, Ma Guanqun, Dong Jun   

  1. College of New Energy and Environment, Jilin University, Changchun 130021, China
  • Received:2019-08-05 Published:2021-02-02
  • Supported by:
    Supported by the National Natural Science Foundation of China (41772241)

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Abstract: In order to find a highly effective remediation agent for soils contaminated by multiple heavy metals, the modified Mg (OH)2 with OH- sustained release function was studied. Through the experiment of stabilization and remediation of heavy metals contaminated soil,the modified Mg(OH)2 stabilization efficiency for multiple heavy metals (lead, cadmium, copper, zinc) in polluted soil and its influence on the form distribution of the multiple heavy metals were studied. The results show that the addition of modified Mg(OH)2 has a stabilizing effect on various heavy metals in soil, and the stabilizing efficiencies for lead, cadmium, copper and zinc are 72.42%, 34.53%, 87.64%,and 97.65%, respectively. Moreover, the modified Mg (OH)2 can significantly reduce the content of exchanged heavy metal states and increase the content of residue states, which can further improve the stability of heavy metals and reduce the bioavailability of heavy metals. In addition, the modified Mg(OH)2 has the characteristics of sustained-release of OH-, which can keep the soil alkaline for a long time,thus the modified Mg(OH)2 is a long-term effective soil remediation agent.

Key words: soil pollution, heavy metals, modified Mg(OH)2, remediation

CLC Number: 

  • X53
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