Title of Paper:Catalytic Effect of a Semiconductor on the Removal of Hexavalent Chromium from Aqueous Solution by gamma-Ray Irradiation

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Affiliation of Author(s):材料科学与技术学院

Journal:WATER AIR AND SOIL POLLUTION

Key Words:Energy dispersive X-ray fluorescence Hexavalent chromium TiO2 Catalysis Gamma-ray irradiation

Abstract:Hexavalent chromium is a type of toxic chemical, it may cause allergies, hereditary genetic defects and cancer in humans by inhalation, and it is also a persistent danger to the environment. However, chromium metal, trivalent chromium and tetravalent chromium have low toxicities. In this study, semiconductor materials (quartz fibre and TiO2) were added to a hexavalent chromium solution and the removal efficiency of hexavalent chromium as a function of the gamma-ray irradiation dose, as well as the catalytic mechanism, was investigated. It was observed that the reduction of hexavalent chromium by gamma-ray irradiation was largely promoted in the presence of semiconductor materials; the semiconductor materials act as catalysts under the gamma-ray irradiation. The hexavalent chromium in the solution can be converted to an insoluble precipitate by gamma-ray irradiation. These results are highly beneficial to apply semiconductor materials as catalysts for the removal of contaminants by radiation.

ISSN No.:0049-6979

Translation or Not:no

Date of Publication:2017-09-01

Co-author:费雄辉,Shan, Qing,F70205423,Jia WB

Correspondence Author:Ling Yongsheng