空心微珠光催化降解联苯胺.pdf

化工环保
2016年第36卷第1期
ENVTRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
HSiW1_O4TiO2/空心微珠光催化降解联苯胺
王晶博,张静,冯宇2,柳敏,黄卫红
(1.海南省环境科学研究院,海南海口571126;2.北京市环境保护科学研究院固体废物污染防治硏究所,
北京10003723.江苏大学环境与安全工程学院,江苏镇江212013)
[摘要]采用复合型光催化剂HSiW1Oo/TiO/空心微珠( cenospheres)光催化降解联苯胺,考察了联苯胺降解效
果的影响因素,并运用FTIR和GS-MS技术分析了联苯胺光催化降解过程的主要中间产物,探讨了联苯胺可能的
降解路径。实验结果表明:以125W中压汞灯为光源,在溶液pH为6.3、初始联苯胺质量浓度为10mg正L的条件下
光反应240min,联苯胺降解率达78%,比TO2/空心微珠提高了24百分点; HASIW12O,/TiO1/空心微珠光催化降解
联苯胺符合表观一级动力学特征,且反应速率常数随初始联苯胺质量浓度的增加而减小; HA Sin2O/IiO2空心
徴珠具有较好的稳定性,易于分离,可重复利用;联苯胺光催化降解过程的主要中间产物为4-氨基联苯、4-氨
基苯酚、对苯二酚和1,4-苯醌。
关键词]硅钨酸二氧化钛空心微珠;光催化;联苯胺;降解
[中图分类号]X703.5
文献标志码]
文章编号]1006-1878(2016)01-0041-06
DOI」10.3969/iss.1006-1878.2016.01.009
Photocatalytic degradation of benzidine on H Siw O i02 /cenospheres
Wang Jingbo Zhang Jing, Feng Yu, Liu Min, Huang Weihong
(1. Hainan Research Academy of Environmental Sciences, Haikou Hainan 571126, China
2. Solid Waste Pollution Control Division, Beijing Municipal Research Institute of Environmental Protection
Beijing 100037, China; 3. School of Environment and Safety Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China)
Abstract; Benzidine was degraded using the composite photocatalyst H Siw, O TIO cenospheres. The factors affecting
the degradation efficiency were investigated. The intermediates in the process of benzidine photocatalytic degradation
were characterized by FTIR and GC-MS technology, and the possible pathway of benzidine photocatalytic gradation was
proposed. The experimental results show that: Under the conditions of using a 125 W medium pressure mercury lamp as light
source, solution PH 6.3, initial benzidine mass concentration 10 ML and reaction time 240 min, the degradation rate of
benzidine reaches 78, which is hiher han hat of usin T enosheres photocatalyst by 24 percent; The photocatalytic
de on of enid e on H$w O Ti enos hees fits the pseudo-first-order kinetis, and the reaction rate constant
decreases with the increases of initial benzidine mass concentration; H Siw ,O Tio cenospheres shows good stability
and is easy to be separated and reused; The major intermediates in the process of benzidine photocatalytic degradation are
identified as 4-aminobiphenyl, 4-aminophenol, hydroquinone, and 1,4-benzoquinone
Key words: HSIW O4 / Tio/cenospheres; photocatalysis; benzidine; degradation
联苯胺类化合物被广泛用于印染、纺织、皮能耗、不造成二次污染的绿色水处理技术被广泛
革等行业。该类化合物具有较高的毒性,在芳胺化研究2】。现有的光催化剂主要以TiO2体系为主。
合物中,联苯胺的致癌性仅次于2-萘胺。在传
统生化处理法中,联苯胺对微生物有抑制作用,处
收稿日期]2015-07-31;[修订日期]2015-10-25。
理过程的水力停留时间长、去除率低。因此,研究
[作者简介]王晶博(1986-),男,浙江省乐清市人,博士,工
程师,电话0898-66705009,电邮rawang②163.com。联系人
联苯胺废水的治理技术及污染物的降解机理具有重
柳敏,电话0898-66568052,电邮 liuminrcees(@l26com
要意义。
[基金项目]海南省科技计划项目(ZDXM2015115);海南省自
光催化氧化技术作为一种高效、低毒性、低然科学基金项目(414194)。