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.
Different surface-modified expanded perlites（CTMAB-EP,TiO_2CTMAB-EP,TiO_2-EP and EP） were prepared by using cetyltrimethyl ammonium bromide（CTMAB） andor TiO_（2）to surface-modify expanded perlite（EP）.The photocatalytic degradation effect of p-nitrophenol in polluted water by these materials,adsorptiondegradation 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 andor TiO_2 could remove p-nitrophenol significantly,and TiO_2CTMAB-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 TiO_2,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 TiO_2CTMAB-EP treatment occurred at pH 8.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2010年第6期768-773,共6页
Research of Environmental Sciences
基金
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
