DNA/CTC双向捕集离子液体浮选分离测定废水中痕量Ni(Ⅱ)  

Determination of Trace Ni(Ⅱ) in Wastewater by DNA/CTC Bidirectional Capture and Ion-Liquid Flotation

作　　者：侯延民 李豪 

机构地区：[1]平顶山学院化学与环境工程学院,河南平顶山467099 [2]郑州大学化学与分子工程学院,河南郑州450001

出　　处：《平顶山学院学报》2017年第5期40-43,49,共5页Journal of Pingdingshan University

摘　　要：在一定条件下,Ni(Ⅱ)在溶液中能够被脱氧核糖核酸(DNA)和金霉素(CTC)双向捕集,形成Ni-CTC-DNA三元缔合物.该缔合物具有良好的疏水性,利用离子液体[bmim]BF_4浮选体系可以将其从混合溶液中分离提取出来.研究了缔合物形成和离子液体浮选过程的影响因素,得到了三元缔合物生成和浮选分离的最优条件.线性回归方程为A=8.03×10~5C-0.000 3,线性范围为4.7×10^(-8)~6.5×10^(-3)mol/L,摩尔吸光率为8.03×10~5L·mol^(-1)·cm^(-1),检出限为1.8×10^(-8)mol/L.该方法可用于工业废水中重金属镍离子的快速检测分析.Under certain conditions,Ni （Ⅱ） in solution can be captured by deoxyribonucleic acid （DNA）and chlortetracycline （CTC）,and forms the ternary complex of Ni-CTC-DNA.This complex has good hydrophobicity,and can be separated easily from the mixed solution via the ion-liquid （[bmim]BF4） flotation system.The method has such characteristics as green environment-friendship,good selectivity,high sensitivity and enrichment.In measurement of heavy metal nickel in industrial wastewater,the linear regression equation is A =8.03 × 10~5C-0.000 3,the linear range 4.7 × 10-8~ 6.5 × 10-3mol/L,molar absorption rate 8.03 ×10~5L·mol-1·cm-1,detection limit 1.8 × 10-8mol/L.The influencing factors on the formation of association compounds and the flotation process of ionic liquids are studied,and the optimum conditions for the formation and flotation separation of ternary complex obtained.

关 键 词：镍(Ⅱ) 三元缔合物 双向捕集 离子液体浮选 

分 类 号：O658.2[理学—分析化学]