Molodovan Z, Vlãdescu L
Talanta. 1996 Sep;43(9):1573-7. doi: 10.1016/0039-9140(96)01941-8.
Chrome Azurol S (CS) was mobilized on an strongly basic anion-exchange resin (Dowex 2 x 4, in Cl(-) form) by batch equilibration. The modified resin was stable in acetate buffer solution and in 0.1 M HCl and H(2)SO(4), but it was readily degraded with 2-6 M HCl and HNO(3). Retention of Ba(II), Sr(II), Ca(II), Mg(II), Al(III), Cr(III), Zn(II), Fe(III), Ti(IV), Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) was studied using the batch equilibration method. The uptake and recovery yields were determined by using inductively-coupled plasma atomic emission spectroscopy (for Mg, Al, Cr, Ti, Fe, Mn, Ni, Zn, Cu, Cd and Pb) and atomic absorption spectrophotometry (for Ba, Sr, Ca and Co). The optimum pH value was established for performing a selective separation of Al(III) from the other metal ions. The sorption capacities of the CS-loaded resing for Al(III), Cr(III), Mg(II) (at pH 6), Fe(III) (at pH 5) and Ti(IV) (at pH 4) were 14, 2.9, 0.3, 3 and 3.9 mumoles g(-1) respectively. On this basis a method for separating Al(III) from other cations was established.
通过分批平衡法将铬天青S（CS）负载于强碱性阴离子交换树脂（Dowex 2×4，Cl⁻形式）上。改性树脂在乙酸盐缓冲溶液以及0.1 M盐酸和硫酸中稳定，但在2 - 6 M盐酸和硝酸中容易降解。采用分批平衡法研究了Ba(II)、Sr(II)、Ca(II)、Mg(II)、Al(III)、Cr(III)、Zn(II)、Fe(III)、Ti(IV)、Mn(II)、Co(II)、Ni(II)、Cu(II)、Cd(II)和Pb(II)的保留情况。通过电感耦合等离子体原子发射光谱法（用于测定Mg、Al、Cr、Ti、Fe、Mn、Ni、Zn、Cu、Cd和Pb）和原子吸收分光光度法（用于测定Ba、Sr、Ca和Co）来测定吸附量和回收率。确定了从其他金属离子中选择性分离Al(III)的最佳pH值。负载CS的树脂对Al(III)、Cr(III)、Mg(II)（在pH 6时）、Fe(III)（在pH 5时）和Ti(IV)（在pH 4时）的吸附容量分别为14、2.9、0.3、3和3.9微摩尔/克。在此基础上建立了一种从其他阳离子中分离Al(III)的方法。
