Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Zengying Zhao; He An; Jing Lin; Mingchao Feng; Vignesh Murugadoss; Tao Ding; Hu Liu; Qian Shao; Xianmin Mai; Ning Wang; Hongbo Gu; Subramania Angaiah; Zhanhu Guo

doi:10.1002/tcr.201800153

Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Chem Rec. 2019 May;19(5):873-882. doi: 10.1002/tcr.201800153. Epub 2018 Nov 14.

Authors

Zengying Zhao¹, He An¹, Jing Lin², Mingchao Feng¹, Vignesh Murugadoss^{3

4

5}, Tao Ding⁵, Hu Liu^{3

6}, Qian Shao⁷, Xianmin Mai⁸, Ning Wang⁹, Hongbo Gu¹⁰, Subramania Angaiah⁴, Zhanhu Guo³

Affiliations

¹ School of Science, China University of Geosciences, Beijing, 100083, China.
² School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China.
³ Chemical and Biomolecular Engineering Department, University of Tennessee, Knoxville, TN, 37996, USA.
⁴ Electrochemical Energy Research Lab, Centre for Nanoscience and Technology, Pondicherry University, Puducherry-, 605 014, India.
⁵ College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
⁶ Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China.
⁷ College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China.
⁸ School of Urban Planning and Architecture, Southwest Minzu University, Chengdu, 610041, China.
⁹ State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China.
¹⁰ Shanghai Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, Shanghai, 200092, China.

PMID: 30426677
DOI: 10.1002/tcr.201800153

Abstract

Rapid industrialization leads to increased wastewater discharge encompassing hexavalent chromium (Cr(VI)), which leads to serious environmental problems of toxicity and potential carcinogenicity. Removal of these species is normally carried out by ion-exchange, precipitation, membrane filtration, sorption, photocatalytic reduction, etc. This review mainly focuses on the photocatalytic and photoelectrocatalytic (PEC) reduction of Cr (VI), because of their advantages over other methods such as reduced risk of secondary pollution by non-reduced Cr (VI), no sludge formation, no need for a large amount of chemical reagents, clean and easy installation. The main factors influencing the photocatalytic reduction efficiency of Cr (VI) such as catalyst activity, solution pH, Cr adsorption on the catalyst and additives, are briefly discussed. Finally, a special emphasis is provided to the photoelectrocatalytic (PEC) reduction of Cr (VI).

Keywords: Chromium removal; Photocatalytic reduction; Photoelectrocatalytic reduction.

Publication types

Review

Abstract

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