天然及改性沸石对磷酸盐的吸附研究  

CHARACTERISTICS OF PHOSPHATE ADSORPTION ON NATURAL AND MODIFIED ZEOLITES

作　　者：全本新 宋德芳[2] 隋维波 孙淑娟[3] 

机构地区：[1]莱西市第一中学(北校),山东青岛266600 [2]即墨市水利局,山东青岛266200 [3]山东农业大学资源与环境学院,山东泰安271018

出　　处：《山东农业大学学报（自然科学版）》2009年第4期545-549,共5页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：以表面活性剂十六烷基三甲基溴化铵(HDTMA)和无机盐为改性剂,考察了有机及无机改性对天然沸石磷酸盐吸附性能的影响。结果表明,表面改性后的沸石对磷酸盐的吸附效率显著提高,其吸附量为有机改性沸石>无机改性沸石>天然沸石。3种沸石对磷酸盐的吸附均符合Freundlich方程。沸石对磷酸盐的吸附分为快吸附和慢吸附,其中快吸附时间约为30 min。当磷酸盐初始质量浓度≤10 mg/L时,改性沸石对磷酸盐的去除率较高。Natural and modified zeolties were use for phosphate sortption experiments. The results of the batch experiments of phosphate adsorption on natural and modified zeolites showed that Frundlich adsorption isotherm was the best in fitting for experimental data. Both the surfactant - modified zeolites and the aluminum modified zeolites showed higher adsorption capacity than natural zeolites, and adsorption capacity was in the order of SMZ 〉 aluminum modified zeolites 〉 natural zeolites. The adsorption process of phosphate on zeolites include fast adsortption and slow adsorption; during the time of fast adsorption, 80% of phosphate adsorption occurred.

关 键 词：天然沸石 改性 HDTMA 磷酸盐 

分 类 号：S152.43[农业科学—土壤学]