Fe-OH/UV-Vis体系中Cr(Ⅵ)还原和BPA降解的协同效应  

SYNERGY EFFECT ON PHOTOCATALYTIC REDUCTION OF Cr(Ⅵ) AND OXIDATION OF BISPHENOL A IN IRON(Ⅲ)-OH/UV-Vis SYSTEM

作　　者：刘延湘[1] 张旭[1] 张长波[1] 吴峰[1] 邓南圣[1] 

机构地区：[1]武汉大学资源与环境学院,武汉430072

出　　处：《环境化学》2008年第1期11-14,共4页Environmental Chemistry

基　　金：国家自然科学基金资助项目(20477031和20177017).

摘　　要：研究了在250W金属卤化物灯(λ≥365nm)照射下,Fe(Ⅲ)-OH配合物同时光催化还原铬(Ⅵ)和氧化双酚A(BPA)的协同效应.结果表明:铬(Ⅵ)光还原和BPA光氧化相互促进,具有协同作用.在低pH值(2.5—4.0)时,光还原铬(Ⅵ)和光氧化BPA的初始速率较大;增加Fe(Ⅲ)的浓度,有利于铬(Ⅵ)光还原和BPA光氧化;铬(Ⅵ)的光还原率及BPA的降解率随其初始浓度的增加而快速减小.Irradiated by a 250W metal halide lamp（λ ≥ 365nm）,synergy effect of the simultaneous photocatalytic reduction of Cr（Ⅵ）and oxidation bisphenol A（BPA）in aqueous solution in the presence of Fe（Ⅲ）-OH complexes were investigated.Results showed that both photocatalytic Cr（Ⅵ）reduction and BPA degradation could occur simultaneously in a Fe/Cr/BPA ternary system,and reveal a synergism.The initial photoreduction rate of Cr（Ⅵ）and the initial oxidation rate of BPA were more rapid at low pH from 2.5 to 4.0.The increase of the initial concentration of Fe（Ⅲ）was favorable to both photoreduction of Cr（Ⅵ）and oxidation of BPA.The reduction efficiency of Cr（Ⅵ）and BPA decreased with the increasing initial concentration of Cr（Ⅵ）and BPA respectively.

关 键 词：协同作用 Fe(Ⅲ)-OH配合物 光氧化 光还原 铬(Ⅵ) 双酚A 

分 类 号：X52[环境科学与工程—环境工程]