沸石的载铁改性及饮用水除氟试验研究  

Modification of Activated Clinoptilolite with Fe^(3+) and the Efficiency in Fluoride Removal of Drinking Water

作　　者：赵良元[1] 胡波 朱迟[1] 高丹英[1] 王博[1] 杨劭[1] 

机构地区：[1]华中师范大学湖北省城市水环境生态学重点实验室,湖北武汉430079 [2]湖北天一建筑设计有限公司,湖北武汉430061

出　　处：《环境科学研究》2008年第1期168-173,共6页Research of Environmental Sciences

基　　金：国家水利部948项目(200731)

摘　　要：为避免使用含铝材料,采用新方法制得载铁改性斜发沸石,并通过一系列静态及动态试验对其除氟性能及影响因素进行了研究.结果表明:经过改性活化的斜发沸石滤料的除氟容量(DC)得到显著提高,静态达0.665 mg/g,动态达0.2 mg/g,分别约为原沸石除氟容量(0.03 mg/g)的20和7倍.载铁改性斜发沸石对F-的吸附符合Langmuir吸附等温模式,其最适pH为6~7,氟吸附速率快,再生稳定;同时其也能高效去除饮用水中的锰离子,除锰容量(MRC)达2.442 mg/g.对高氟地下水的处理效果证明,该滤料不仅降氟达到国家饮用水标准,而且具有再生简易、使用寿命长等特点.To avoid using aluminum-bearing material, activated clinoptilolite was modified by Fe^3＋ ion. Static and dynamic experiments were carried out to study the defluoridation characteristics and impact of physio-chemical factors. The results indicated that the Fe^3＋ -modification significantly increased defluoridation capacity （DC） of clinoptilolite. The static DC and dynamic DC were 0.665 and 0.2 mg/g, respectively, corresponding to twenty times and seven times of that of original clinoptilolite （0.03 mg/g）. The optimal pH range is 6 - 7. The adsorption fits in Langmuir model. Fluoride adsorption by Fe^3＋ -carried chnoptilolite is fast, and the adsorption capacity was stable after regeneration. Fe^3＋ - modified clinoptilolite also showed capacity to remove manganese from drinking water; the manganese adsorption capacity （MRC） was 2.442 mg/g. The result of treatment experiment with high-fluoride underground water showed that the water quality after treatment met the national criteria of drinking water. The safety and effectiveness in fluoride and manganese removal indicate that Fe^3＋ -modified clinoptilolite is competitive in market of defluoridation techniques of drinking water.

关 键 词：载铁 斜发沸石 高氟饮用水 除氟 

分 类 号：X523[环境科学与工程—环境工程]