Catalytic Reductive Degradation of Cr(Ⅵ)
Honghong Wang , Wen Lei , Xiaojian Li , Zhong Huang , Quanli Jia , Haijun Zhang
Progress in Chemistry ›› 2020, Vol. 32 ›› Issue (12) : 1990 -2003.
With the rapid development of industrialization, the discharge of wastewater containing hexavalent chromium(Cr(Ⅵ)) is increasing day by day. The toxicity and high mobility of Cr(Ⅵ) cause great environmental pollution. Reducing Cr(Ⅵ) to trivalent chromium(Cr(Ⅲ)) with low toxicity and low fluidity is one of the current effective treatment methods. Compared with the traditional methods, the catalytic reduction of Cr(Ⅵ) driven by sunlight, electricity and microwave, has the advantages of no catalyst consumption, less reductant consumption, no secondary pollution and limited resource loss, and has become an effective solution to deal with Cr(Ⅵ) pollution. Based on this, the present paper reviews the application of photocatalyst, electrocatalyst and microwave catalyst for Cr(Ⅵ) reduction. Based on the summary and analysis of previous research results, the research direction and key points of Cr(Ⅵ) catalytic reduction technology in the future are prospected.
1 Introduction
2 Photocatalyst
2.1 Morphology control
2.2 Surface modification
2.3 Ion doping
2.4 Introduction of defect
2.5 Composite material
3 Electrocatalyst
3.1 Electrochemical catalyst
3.2 Piezoelectric catalyst
4 Photo-electrocatalyst
5 Microwave catalyst
5.1 Microwave enhanced catalyst
5.2 Microwave induced catalyst
6 Conclusion and outlook
Cr(Ⅵ) / catalytic reduction / photocatalyst / electrocatalyst / photo-electrocatalyst / microwave catalyst
the National Natural Science Foundation of China(No. 51872210)
the National Natural Science Foundation of China(51672194)
the Key Program of Natural Science Foundation of Hubei Province, China(No. 2017CFA004)
and the Program for Innovative Teams of Outstanding Young and Middle-Aged Researchers in the Higher Education Institutions of Hubei Province(No. T201602)
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