纳米二氧化钛对隔离子的吸附研究  

The Study on the Absorption of Cadmium Ion by Nano-titanium Dioxide

作　　者：尹洪喜[1] 张万忠[1] 高恩君[1] 

机构地区：[1]沈阳化工学院配位化学研究室,辽宁沈阳110142

出　　处：《当代化工》2007年第5期482-484,487,共4页Contemporary Chemical Industry

基　　金：沈阳市科技基金;项目编号:1053125-1-34

摘　　要：研究了纳米二氧化钛吸附溶液中镉离子的有效方法和途径。采用双硫腙直接比色法测定镉离子浓度,详细研究了纳米二氧化钛吸附镉离子过程中的影响因素。通过实验,确定了吸附的最佳条件,进一步研究了吸附镉离子后二氧化钛的洗脱以及设想模拟实体水样中痕量镉离子的检测。样品体系在pH=10,震荡时间9 min以上的条件下,纳米二氧化钛对镉离子的吸附率可达99%。吸附在纳米二氧化钛上的镉离子可以用0.1 mol/L的硝酸进行洗脱,洗脱率在95%以上。A novel method of sewage disposal via nano - titanium dioxide absorbing cadmium ion was proposed. Influencing factors on the absorption of Cadmium ion by nano - titanium dioxide were studied through direct colorimetry. The experi- ment of the elution of nano - titanium dioxide absorped cadmium ion was carried out preliminarily and the feasible absorp- tion condition was certained, simulating to detect trace amount cadmium ion in entity water. While the pH of experiment system is 10 and the surge time stand out 9 minutes, the absorption rate of cadmium ion on nano - titanium dioxide is above 99 %. The cadmium ion absorped by nano - titanium dioxide is Muted effectively with 0.1 mol/L nitric acid and the elufion rate is beyond 95 %.

关 键 词：纳米二氧化钛 镉离子 吸附 

分 类 号：TQ134.11[化学工程—无机化工]