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Remediation of heavy metals polluted soil environment: A critical review on biological approaches.
Zheng, Xiaojun; Lin, Hongjun; Du, Daolin; Li, Guanlin; Alam, Ohidul; Cheng, Zheng; Liu, Xinlin; Jiang, Shan; Li, Jian.
Afiliación
  • Zheng X; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
  • Lin H; Jiangsu Xianghe Agricultural Development Co. LTD, Lianyungang, Jiangsu 222048, China.
  • Du D; Jingjiang College, Institute of Environment and Ecology, School of the Environment and Safety Engineering, School of Emergency Management, Jiangsu University, Zhenjiang 212013, China.
  • Li G; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
  • Alam O; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address: ohid776@gmail.com.
  • Cheng Z; Jiangsu Xianghe Agricultural Development Co. LTD, Lianyungang, Jiangsu 222048, China.
  • Liu X; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
  • Jiang S; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China.
  • Li J; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China. Electronic address: jianli@ujs.edu.cn.
Ecotoxicol Environ Saf ; 284: 116883, 2024 Aug 21.
Article en En | MEDLINE | ID: mdl-39173222
ABSTRACT
Heavy metals (HMs) pollution is a globally emerging concern. It is difficult to cost-effectively combat such HMs polluted soil environments. The efficient remediation of HMs polluted soil is crucial to protect human health and ecological security that could be carried out by several methods. Amidst, biological remediation is the most affordable and ecological. This review focused on the principles, mechanisms, performances, and influential factors in bioremediation of HMs polluted soil. In microbial remediation, microbes can alter metallic compounds in soils. They transform these compounds into their metabolism through biosorption and bioprecipitation. The secreted microbial enzymes act as transformers and assist in HMs immobilization. The synergistic microbial effect can further improve HMs removal. In bioleaching, the microbial activity can simultaneously produce H2SO4 or organic acids and leach HMs. The production of acids and the metabolism of bacteria and fungi transform metallic compounds to soluble and extractable form. The key bioleaching mechanisms are acidolysis, complexolysis, redoxolysis and bioaccumulation. In phytoremediation, hyperaccumulator plants and their rhizospheric microbes absorb HMs by roots through absorption, cation exchange, filtration, and chemical changes. Then they exert different detoxification mechanisms. The detoxified HMs are then transferred and accumulated in their harvestable tissues. Plant growth-promoting bacteria can promote phytoremediation efficiency; however, use of chelants have adverse effects. There are some other biological methods for the remediation of HMs polluted soil environment that are not extensively practiced. Finally, the findings of this review will assist the practitioners and researchers to select the appropriate bioremediation approach for a specific soil environment.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Ecotoxicol Environ Saf Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Ecotoxicol Environ Saf Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos