二氧化钛光催化剂还原六价铬的影响因素研究  

Affecting Factors of the Reduction of Hexavalent Chromiumby Titanium Dioxide Photocatalyst

作　　者：任金秋 凌新 陆春海[1,2] Ren Jinqiu;Ling Xin;Lu Chunhai(Sichuan Key Laboratory of Applied Nuclear Techniques in Geosciences(Chengdu University of Technology),Chengdu 610059,China;State Environmental Protection Key Laboratory of Synergistic Control and Joint Remediation for Soil and Water Pollution(Chengdu University of Technology),Chengdu 610059,China)

机构地区：[1]地学核技术四川省重点实验室(成都理工大学),四川成都610059 [2]国家环境保护水土污染协同控制与联合修复重点实验室(成都理工大学),四川成都610059

出　　处：《山东化工》2021年第5期48-50,53,共4页Shandong Chemical Industry

基　　金：四川省教育厅科研项目(JG2018-477)。

摘　　要：铬是常见元素,在自然界主要以三价铬和六价铬形式存在,其中六价铬的毒性是三价铬的数百倍。本文采用二氧化钛光催化剂还原六价铬,发现在酸性条件下光催化还原六价铬效率更高,催化剂投放量不宜超过1 g/L;甲醇牺牲剂可以加速光催化反应但用量不宜超过0.4 mg/L;另外,铬浓度也影响还原效率。Chromium is a common element,which mainly exists in the form of trivalent chromium and hexavalent chromium in nature.The toxicity of hexavalent chromium is hundreds of times higher than that of trivalent chromium.In this paper,titanium dioxide photocatalyst was used to reduce hexavalent chromium.It was found that the photocatalytic reduction efficiency for hexavalent chromium was higher under acidic conditions than under alkaline conditions.Meanwhile,the amount of catalyst and methanol sacrificial agent should not exceed 1 g/L and 0.4 mg/L,respectively.In addition,the chromium concentration also affected the reduction efficiency.

关 键 词：二氧化钛 光催化 还原 铬 

分 类 号：TQ426.8[化学工程]