生物修复
环境修复
六价铬
环境化学
污染
铬
危险废物
环境科学
废物管理
土壤污染
化学
生态学
工程类
生物
有机化学
作者
Abdul Azeez Nazeer,Swati Sucharita Dash,Sathyanarayana N. Gummadi,Sudarshana Deepa Vijaykumar
出处
期刊:Chemosphere
[Elsevier]
日期:2020-12-05
卷期号:266: 129204-129204
被引量:147
标识
DOI:10.1016/j.chemosphere.2020.129204
摘要
The inexorable industrialization and modern agricultural practices to meet the needs of the increasing population have polluted the environment with toxic heavy metals such as Cr(VI), Cu2+, Cd2+, Pb2+, and Zn2+. Among the hazardous heavy metal(loid)s contamination in agricultural soil, water, and air, hexavalent chromium [Cr(VI)] is the most virulent carcinogen. The metallurgic industries, tanneries, paint manufacturing, petroleum refineries are among various such human activities that discharge Cr(VI) into the environment. Various methods have been employed to reduce the concentration of Cr(VI) contamination with nano and bioremediation being the recent advancement to achieve recovery at low cost and higher efficiency. Bioremediation is the process of using biological sources such as plant extracts, microorganisms, and algae to reduce the heavy metals while the nano-remediation uses nanoparticles to adsorb heavy metals. In this review, we discuss the various activities that liberate Cr(VI). We then discuss the various conventional, nano-remediation, and bioremediation methods to keep Cr(VI) concentration in check and further discuss their efficiencies. We also discuss the mechanism of nano-remediation techniques for better insight into the process.
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