光催化活性艳橙脱色降解  

Photocatalysis Degradation Reactive Bright Orange Solution

作　　者：朱秀华[1,2] 朱敏[1] 王炜[1] 穆军[1] 彭孝军[2] 张蓉[2] 

机构地区：[1]大连交通大学环境与化学工程学院,辽宁大连116028 [2]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《大连交通大学学报》2009年第2期75-78,共4页Journal of Dalian Jiaotong University

基　　金：大连理工大学精细化工国家重点实验室开放课题基金资助项目(KF0707)

摘　　要：以253.7 nm紫外灯(20 W)、氙灯(500 W)和太阳光为光源,研究了多金属氧酸盐(磷钨酸,硅钨酸)及二氧化钛对模拟染料废水活性艳橙(KGN)溶液的光催化脱色降解性.结果表明,以磷钨酸为光催化剂时,KGN溶液的初始pH、催化剂投加量及光源对光解效果均有影响.在平均光照强度为98000 lx的晴天,KGN溶液(100 mL)的初始浓度为10 mg/L,溶液初始pH为2.00,磷钨酸投量为0.6 g/L时,光照1 h,其色度去除率达96.67%,TOC去除率79.22%、COD去除率85.98%,BOD5/COD为0.3,达到可生化降解的程度.研究表明H3PW12O40、H4S iW12O40、TiO2三种催化剂光催化降解KGN能力不同,在紫外光和日光下,其降解活性艳橙的能力依次为:TiO2>H3PW12O40 H4S iW12O40.H3PW12O40虽略逊于TiO2,但光照相同时间后出水也已达到可生物降解的程度.Photocatalytic decomposition of reactive bright orange （abbreviated as KGN ） with polyoxometale （H3PW12O40 and H4SiW12O40 ） and TiO2 was investigated in an aqueous solution with a 20 W UV lamp,a 500 W Xe arc lamp and sunlight. The effects of KGN solution initial pH, catalyst quantity and irradiation light source on decolorization and TOC and COD removal rates were studied. The results indicated that when solar irradiation average intensity was 98 000 lx, initial KGN concentration and pH was 10mg/L, and 2.00, respectively, with O. 6 g/L catalyst,after 1 h irradiation,the deeolorization rate was 96.67% ,and TOC and COD removal rates were 79.22% and 85.98% ,the ratio of BODs/COD was 0.3. The for photoeatalytic degradation of KGN is different, and the order capacity of H3PW12O40, H4SiW12O40 and TiO2 follows TiO2 〉 H3PW12O40〉〉H4SiW12O40. The efficiency of decolorization and mineralization of KGN with H3PW12O40 is comparable with TiO2 under the irradiation of UV lamp and sunlight, and the effluent water can be treated with ordinary biochemical process.

关 键 词：多金属氧酸盐 光催化 活性艳橙 脱色降解 

分 类 号：X703[环境科学与工程—环境工程]