Hg^(2+)离子的光催化还原的研究  

Study on Photocatalytic Reduction of Hg^(2+) Cation

作　　者：吴光辉[1] 周韦[1] 钟劲茅[1] 杨莉[1] 

机构地区：[1]南昌航空工业学院环境与化学工程系,南昌330034

出　　处：《环境科学与技术》2005年第2期15-16,共2页Environmental Science & Technology

摘　　要：研究了反应时间、pH值、d 半乳糖对锐钛型TiO2 光催化还原Hg2+离子(HgCl2 水溶液)影响,结果表明: 反应20min时,还原率达到最高,随后略下降;还原率随着pH值的降低而降低;d 半乳糖能有效促进 Hg2+离子的光催化还原,还原率一直上升, 不会出现最高点;加入量超过一定值(16mmol/L)后,促进效果几乎相同,反应90min时,还原率达100%。The photocatalytic reduction of Hg^(2+) cation (aqueous solution of mercury chloride) using anatase TiO_2 was studied as a function of irradiation time, pH of the solution, d-galactose. Results showed that photoreduction efficiency of Hg^(2+) cation reached the highest value in 20min illumination, and then decreased a little; the photoreduction decreased with the decrease of pH value. Adding d-galactose enhanced photoreduction of Hg~(2+\} cation and made photoreduction efficiency increased continuously, after adding amount of d-galactose exceeded 16mmol/L, different adding amount had similar effective results, they all led to a complete photoreduction in about 90min illumination.

关 键 词：光催化还原 HG^2+ pH值 离子 TI02 水溶液 加入量 上升 CL2 定值 

分 类 号：X703.1[环境科学与工程—环境工程] X773