顶空气相色谱测试水中苯系混合物在不同材料上的吸附行为  

Study on the adsorption behavior of benzene mixture in water on different materials by headspace gas chromatography

作　　者：王银叶[1] 郭晓霞[1] 张晶[1] 

机构地区：[1]天津城市建设学院环境与市政工程系,天津市水质科学与技术重点实验室,天津300384

出　　处：《环境污染与防治》2012年第3期45-48,共4页Environmental Pollution & Control

基　　金：天津市应用基础及前沿技术重点项目(No.10JCZDJC24100)

摘　　要：设计了正交实验对5种材料吸附模拟废水中苯系混合物(苯、甲苯、二甲苯)的条件进行优化,CD02硅藻土与X型纳米分子筛以2∶1(质量比)进行复合后,对苯系混合物去除效果最好。采用顶空气相色谱法测定8种不同材料对水中苯系混合物的去除情况,结果表明复合材料对苯系混合物具有良好的去除效果,仅次于活性炭。复合材料在pH为7、搅拌时间为25min、用量为1.8g/L时,对苯系混合物质量浓度为4.0mg/L模拟废水的平均去除率为87.56%。经过4次再生后,复合材料的再生率仍高达84.90%,对苯系混合物的平均去除率为91.49%。The orthogonal experiment was designed to optimize the adsorption of benzene mixture （benzene, tol- uene, xylene） by five kinds of materials. The results showed that the compound of CD02 diatomite and X-nano zeolite with the mixing ratio of 2 ： 1 was the best composite material for removal of benzene mixture in water. The adsorption behavior of 8 adsorbent for benzene mixture was analyzed with the help of headspace gas chromatography, the ob- tained composite material presented perfect adsorption capacity, which was only inferior to activated carbon. The per- formance of regenerated composite material was also detected. It was found that under the pH of 7, the stirring time of 25 min,the composite material dosage of 1.8 g/L, initial concentration of benzene mixture was 4.0 mg/L, the re- moval rate could reach about 87.56%. After 4 times of regeneration, the recycling rate of composite material was a- bout 84.90%, and the average removal rate could reach to 91.49%.

关 键 词：苯 甲苯 二甲苯 苯系混合物 顶空气相色谱法 

分 类 号：X832[环境科学与工程—环境工程] O657.71[理学—分析化学]