改性斜发沸石对OH^-吸附动力学的研究  

Adsorption Kinetic of OH^- on Modified Clinoptilolite

作　　者：张林栋[1] 赵敬涛[1] 

机构地区：[1]河北工业大学海水资源高效利用化工技术教育部工程研究中心,天津300130

出　　处：《河北工业大学学报》2010年第4期48-52,共5页Journal of Hebei University of Technology

基　　金：河北省自然科学基金(B2007000008)

摘　　要：以5种改性斜发沸石为原料,通过吸附不同碱溶液中的OH-,确定了最佳的碱溶液和改性沸石,并对OH-浓度和吸附动力学进行了研究.研究表明:钙改性沸石和镁改性沸石对Ca(OH)2溶液中OH-的单位吸附量最大;在25℃下,钙改性沸石的全吸附容量为22.21mg/g,镁改性沸石的全吸附容量为25.30mg/g;通过动边界模型理论可确定在25℃下钙改性沸石和镁改性沸石吸附OH-的动力学吸附过程主要由颗粒扩散控制.The best alkaline solution and modified zeolite were successfully determined by adsorbing OH-in the different alkaline solutions using five kinds of modified clinoptilolite as starting materials,and the OH-concentration as well as adsorption kinetic were studied.The study results showed that the OH-adsorption capacity of Mg modified zeolite and that of Ca modified zeolite were larger than others in the Ca(OH)2 solution.The maximum capacity of Ca modified zeolite was 22.21 mg/g at 25℃,and that of Mg modified...

关 键 词：改性斜发沸石 吸附 OH- 全吸附容量 动边界模型 

分 类 号：X703.1[环境科学与工程—环境工程]