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MES research in bacteria, wastewater. Environmental deterioration is caused by a variety of pollutants; however, heavy metals are often a ...

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System
REVIEW

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Abstract

Environmental deterioration is caused by a variety of pollutants; however, heavy metals are often a major issue. Development and globalization has now also resulted in such pollution occurring in developing societies, including Africa and Asia. This review explores the geographical outlook of soil pollution with heavy metals. Various approaches used to remedy metal-polluted soils include physical, chemical, and biological systems, but many of these methods are not economically viable, and they do not ensure restoration without residual effects. This review evaluates the diverse use of plants and microbes in biotransformation and removal of heavy metals from contaminated soil. Mechanisms on how natural processes utilizing plants (phytoremediation) and microorganisms (bioremediation) remove or reduce heavy metals from soil at various levels are presented. This review concludes that remediation technologies are necessary for the recovery of metal-contaminated environments and the prevention of continuous environmentally toxic impacts on living organisms.

Keywords

PhytoremediationEnvironmental remediationBioremediationPhytoextraction processSoil contaminationPollutant

Identifiers

DOI
10.1139/ER-2017-0045
Journal
Environmental Reviews
Year
2018