Reductive materials for remediation of hexavalent chromium contaminated soil - A review

Zhihui Yang; Xiaoming Zhang; Zhi Jiang; Qi Li; Peicheng Huang; Chujing Zheng; Qi Liao; Weichun Yang

doi:10.1016/j.scitotenv.2021.145654

Reductive materials for remediation of hexavalent chromium contaminated soil - A review

Sci Total Environ. 2021 Jun 15:773:145654. doi: 10.1016/j.scitotenv.2021.145654. Epub 2021 Feb 5.

Authors

Zhihui Yang¹, Xiaoming Zhang², Zhi Jiang², Qi Li², Peicheng Huang², Chujing Zheng², Qi Liao¹, Weichun Yang³

Affiliations

¹ Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China.
² Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China.
³ Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Lushan South Road 932, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, PR China. Electronic address: yang220@csu.edu.cn.

PMID: 33582355
DOI: 10.1016/j.scitotenv.2021.145654

Abstract

Chemical reduction of Cr(VI) to Cr(III) by reductive materials is the most widely used technology for the remediation of Cr(VI)-contaminated soil due to its high efficiency, adaptability and low cost. This paper reviews chromium chemistry and the materials that can effectively reduce Cr(VI) to Cr(III) for the remediation of Cr(VI)-contaminated soil, namely iron-bearing reductants, sulfur-based compounds and organic amendments. Moreover, we discuss the corresponding mechanisms involved in the process of immobilization of Cr(VI) in polluted soil, and emphasize the relationship between the materials remediation performance and soil environmental conditions. Besides, perspectives on the potential future researches of novel materials design and technological development in the remediation of Cr(VI) contaminated soil are also put forward.

Keywords: Cr(VI)-contaminated soil remediation; Immobilization mechanisms; Iron-bearing reductants; Organic amendments; Sulfur-based compounds.

Publication types

Review