引用本文:王小治,高芡芡,葛晓梅,雍卫卫,封 克,等.CTMAB/TiO2表面修饰膨胀珍珠岩光催化降解水中对硝基苯酚[J].环境科学研究,2010,23(6):768-773.
WANG Xiao-zhi,GAO Qian-qian,GE Xiao-mei,YONG Wei-wei,FENG Ke,et al.Photocatalytic Degradation of p-Nitrophenol in Water by Surface-modified Expanded Perlite with CTMAB/TiO2[J].Reserrch of Environmental Science,2010,23(6):768-773.]
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CTMAB/TiO2表面修饰膨胀珍珠岩光催化降解水中对硝基苯酚
王小治1,2, 高芡芡1, 葛晓梅1, 雍卫卫1, 封 克1
1.扬州大学环境科学与工程学院, 江苏 扬州 225127;2.扬州大学化学化工学院, 江苏 扬州 225009
摘要:
用溴化十六烷基三甲铵(CTMAB)和/或TiO2对膨胀珍珠岩(EP)进行表面修饰,获得不同表面修饰膨胀珍珠岩(CTMAB-EP,TiO2/CTMAB-EP,TiO2-EP和EP),研究其对水中对硝基苯酚的去除效果、吸附降解动力学以及最适条件. 结果表明:膨胀珍珠岩对对硝基苯酚的吸附去除能力很小,对其用CTMAB进行表面修饰或负载TiO2均可显著提高对硝基苯酚的去除率,同时负载CTMAB和TiO2的膨胀珍珠岩对对硝基苯酚的去除率最高;环境修复材料用量、振荡时间、初始ρ(对硝基苯酚)和pH等对去除效果有一定影响. 膨胀珍珠岩上负载的TiO2对对硝基苯酚的光催化降解能力受pH的影响不大,表面活性剂CTMAB在pH为8时对对硝基苯酚的吸附能力较强,pH为8时修复材料对对硝基苯酚的去除效果最好.
关键词:  膨胀珍珠岩  表面活性剂  TiO2  光催化降解  对硝基苯酚
DOI:
分类号:
基金项目:江苏省博士后基金(0802021B);江苏省高校自然科学重大基础研究项目(06KJA15011);江苏省环境材料与环境工程重点实验室项目;扬州大学博士后基金
Photocatalytic Degradation of p-Nitrophenol in Water by Surface-modified Expanded Perlite with CTMAB/TiO2
WANG Xiao-zhi1,2, GAO Qian-qian1, GE Xiao-mei1, YONG Wei-wei1, FENG Ke1
1.College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China;2.College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, China
Abstract:
Different surface-modified expanded perlites (CTMAB-EP, TiO2/CTMAB-EP, TiO2-EP and EP) were prepared by using cetyltrimethyl ammonium bromide (CTMAB) and/or TiO2to surface-modify expanded perlite (EP). The photocatalytic degradation effect of p-nitrophenol in polluted water by these materials, adsorption/degradation kinetics and relevant factors affecting removal effects were studied. The results showed that EP had little ability to remove p-nitrophenol in water, while EP modified with CTMAB and/or TiO2 could remove p-nitrophenol significantly, and TiO2/CTMAB-EP treatment showed the highest removal rate among all treatments. Removal effects of the materials were influenced by the dosage of the materials, shaking time, initial concentration of p-nitrophenol in water and pH. The pH had no significant effect to photocatalytic degradation of p-nitrophenol by TiO2, but produced a significant effect on adsorption of p-nitrophenol by CTMAB. The highest adsorption of p-nitrophenol by CTMAB and the highest removal rate of p-nitrophenol by TiO2/CTMAB-EP treatment occurred at pH 8.
Key words:  expanded perlite  surfactant  TiO2  photocatalytic degradation  p-nitrophenol