改性斜发沸石吸附水中腐殖酸的研究  

Research on Humic Acid Adsorption by Modified Clinoptilolite

作　　者：方金鹏[1] 张盼月[1] 曾光明[1] 邹塞[1] 杨力[1] 吴昊[1] 曹群[2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]长沙环境保护职业技术学院环境工程系,湖南长沙410004

出　　处：《中国给水排水》2008年第23期48-51,共4页China Water & Wastewater

基　　金：教育部新世纪优秀人才支持计划项目(531105050030);教育部留学回国人员基金资助项目(757210005)

摘　　要：采用十六烷基三甲基溴化铵改性天然斜发沸石,考察了吸附时间、吸附剂投量、腐殖酸起始浓度和pH对改性沸石吸附腐殖酸的影响。结果表明,在温度为25℃、pH=3、改性沸石投量为2g/L、水中腐殖酸起始浓度为10mg/L的条件下,改性沸石静态吸附120min后对腐殖酸的去除率可达95.2。采用Langmuir和Freundlich吸附等温式拟合改性沸石对腐殖酸的吸附表明,改性沸石对腐殖酸的吸附能够很好地符合Langmuir吸附等温式,理论最大吸附量为18.529mg/g,说明改性斜发沸石是一种吸附水中腐殖酸的良好吸附剂。Natural clinoptilolite was modified with hexadecyltrimethylammonium bromide, and the surfactant-modified clinoptilolite （SMZ） was used for the adsorption of humic acid in water. The effects of sorption time, adsorbent dosage, initial humic acid concentration and pH on the humic acid adsorption onto SMZ were investigated. The results show that the removal rate of humic acid reaches 95.2% in the optimal conditions： contact time = 120 min, T = 25 ℃, pH = 3, SMZ dosage = 2 g/L, initial humic acid concentration = 10 mg/L. Langmuir and Freundlich isotherms were used to fit the humic acid adsorption onto SMZ, and the experimental results show that the humic acid adsorption onto SMZ accords with Langmuir isotherm. The maximum theoretical adsorption capacity is 18. 529 mg/g, which demonstrates that SMZ is a good adsorbent for treating humic acid-contaminated water.

关 键 词：斜发沸石 表面改性 腐殖酸 十六烷基三甲基溴化铵 吸附等温式 污水处理 

分 类 号：X832[环境科学与工程—环境工程]