纳米Zr(OH)_4及纳米ZrO_2对Cu(Ⅱ)的吸附行为  

Adsorption Behaviors of Cu(Ⅱ) on Nanometer-sized Zr(OH)\-4 and ZrO\-2

作　　者：朱明燕[1] 彭勇[1] 侯书恩[1] 韩丽[1] 

机构地区：[1]中国地质大学纳米科学技术中心,武汉430074

出　　处：《化学通报》2004年第12期919-924,共6页Chemistry

基　　金：湖北省科技攻关重大项目 (2 0 0 2 AA10 5 A);地调项目 (2 0 0 12 0 190 10 8)资助项目

摘　　要：对纳米 Zr(OH) 4 粉体及其在不同温度 (35 0～ 6 0 0℃ )下的煅烧产物静态吸附 Cu( )的行为进行了研究 ,并考察了影响静态吸附以及解吸的因素。试验结果表明 ,煅烧温度越高 ,样品的吸附效果越差。除了 6 0 0℃煅烧的样品吸附性能较差外 ,纳米 Zr(OH) 4 和其它样品在溶液 p H>3时对 Cu( )有很好的吸附效果 ,吸附率均大于 96 %。在实验范围内 ,吸附量最高可达到 2 6 40 0 μg/ g。被吸附的 Cu( )在低浓度的盐酸 (<2 .0 mol/ L)中即可较好的被洗脱 ,10 0℃时解吸率可达到 96 % ,同时也有很好的富集效果。The static adsorption behaviors of Cu(Ⅱ) on nanometer-sized Zr(OH)\-4 powders and its sintering productions at different temperatures (from 350℃ to 600℃) were investigated. Some influence factors in the process of adsorption and desorption were studied. It is found that, with the sintering temperature increasing, their adsorptibility decreases. Except the sample sintered at 600℃, the other samples can easily adsorb Cu(Ⅱ) at pH 3～7 and the adsorption rates are more than 96%. The higher the adsorption temperature is, the more the adsorption amounts are. The maximum adsorption amounts of Cu(Ⅱ) on nanometer-sized Zr(OH)\-4 powders reaches to 26400μg/g at 100℃. Under the optimum adsorption condition, Cu(Ⅱ) can be desorbed more easily using low concentration hydrochloric acid (<2.0mol/L) at high temperature. At 100℃ the desorption rate can reach to 96% and good preconcentration results are found.

关 键 词：纳米ZRO2 煅烧温度 OH 粉体 煅烧产物 Cu(Ⅱ) 盐酸 吸附行为 样品 吸附性能 

分 类 号：O647.3[理学—物理化学]