利用镁铝双金属氧化物去除S^(2-)的研究  

Study on Mg-Al layered double oxides for sulfide anion( S^(2-)) removal

作　　者：王孝华[1] 李传强[1] 汤琪[1] 李榕榕[1] 

机构地区：[1]重庆交通大学应用化学系,重庆400074

出　　处：《应用化工》2015年第3期401-404,共4页Applied Chemical Industry

基　　金：国家自然科学基金(21307168);重庆市自然科学基金(cstcjja 50016)

摘　　要：通过共沉淀法合成镁铝层状双金属氢氧化物(Mg Al-LDHs),在500℃焙烧下得到产物镁铝双金属氧化物(Mg Al-LDO)。利用络合滴定的方法测定合成的镁铝双金属氧化物(Mg Al-LDO)中镁和铝的含量,对合成的Mg AlLDO进行元素分析,进而对结构进行了分析,得到镁铝双金属氧化物的结构式为Mg2Al O3(OH)。在溶液的p H=9条件下,利用所制得的Mg Al-LDO去除S2-,同时考察了溶液的初始浓度、去除时间以及温度对去除率的影响。结果表明,Mg Al-LDO具有较好的去除S2-能力,当去除时间为8 h,溶液初始浓度为15 g/L,常温(19.8℃)下,对S2-的最大去除率为81.93%。Mg-Al layered double hydroxides（ Mg Al-LDHs） were prepared by co-precipitation,and Mg-Al layered double oxide（ Mg Al-LDO） was made at 500 ℃ by calcining Mg Al-LDHs. The content of magnesium and aluminum in double metal oxide（ Mg Al-LDO） is determined by using complexometric titration method,and analyzes the structure by the way of element analysis,the structural formula of double metal oxide magnesium aluminum is Mg2 Al O3（ OH）. Under the condition of the solution p H = 9,remove S2-by using Mg Al-LDO,and investigate the influence of the initial concentration of the solution,the removing time and temperature on the removal rate at the same time. The results showed that the Mg Al-LDO has a good ability to remove S2-,when removing the time is 8 h,initial concentration of 15 g /L,under normal temperature（ 19. 8 ℃）,the maximum removal rate of 81. 93%.

关 键 词：镁铝双金属氧化物 元素分析 二价硫离子 去除率 

分 类 号：TQ139.2[化学工程—无机化工] O614.2[理学—无机化学]