氧化铝负载镧去除水中F^-的研究  

Removal of fluoride from water using lanthanum oxide-coated alumina

作　　者：顾浩[1] 许昭怡[1] 李丽媛[1] 刘凤玲[1] 郑寿荣[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210093

出　　处：《环境科学学报》2009年第3期589-593,共5页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.40402022,20677026);江苏省科技项目(No.BK2005417,BS2007100);国家科技支撑计划项目(No.2006BAC02A15)~~

摘　　要：通过固相反应合成了氧化铝负载的氧化镧吸附剂并研究了其对水中F-的吸附.结果表明,合成的材料对F-有很好的去除效果,最大吸附量达到53.4mg·g-1;适当提高吸附温度和氧化镧负载量都能在一定范围内提高吸附量;较低的固相反应焙烧温度有利于提高去除率,随着焙烧温度的升高,吸附量从170℃焙烧的42.2mg·g-1下降到了350℃焙烧的32.9mg·g-1.同时,吸附剂表现出了很好的适应性,在较宽的pH范围内都能保持较高的吸附量.Lanthanum oxide-coated alumina was prepared by a solid-state reaction, and its ability to adsorb fluoride from aqueous solution was investigated. Results showed that the adsorbent had a high capacity with the maximum adsorption capacity of 53.4 mg·g^-1. Increasing the loading of lanthanum oxide as well as the adsorption temperature enhanced fluoride adsorption. The high fluoride adsorption capacity could be retained over a relatively wide pH range （pH 6 to 9）. Increasing the calcination temperature from 170℃ to 350℃ led to a decrease of fluoride absorption capacity from 42,2 to 32.9 mg.g^-1

关 键 词：氧化镧 氧化铝 负载 氟离子 吸附 

分 类 号：X131.2[环境科学与工程—环境科学]