イミノジ酢酸キレート樹脂による金属イオンの吸着

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Studies were conducted on the adsorption equilibrium of Cu(II), Cd(II), Zn(II), Ni(II), Sm(III) and In(III) from aqueous media at low acidities by iminodiacetic acid chelating resin, and were conducted on the adsorption rates of Sm(III) by iminodiacetic acid chelating resin using a stirred transfer cell. Adsorption equilibrium of these metallic ions of divalent (M^<2+>) and trivalent (M^<3+>) on the iminodiacetic acid chelating resin can be expressed by following equations, respectively. [numerical formula] [numerical formula] The equilibrium constants K_<ex> of Cu(II), Cd(II), Zn(II), Ni(II), Sm(III) and In(III) were found to be 6×10^2, 1.10, 1.00, 4.80mol/m^3 and 1.41×10^3, 4.91×10^4mol^2kg/m^6, respectively. The initial adsorption rate of Sm(III) No decreased with increasing of hydrogen ion concentration [H^+] at [H^+]>0.1mol/m^3, and the dependence of hydrogen ion concentration on adsorption rate became nearly zero at[H^+]≦0.1mol/m^3. The initial adsorption rate of Sm(III) decreased with increasing of Sm(III) concentration [Sm]^To. The ratio of mass transport resistance of Sm(III) (1/ks av) against the overall mass transport resistance (1/Ks av) lowered remarkably with increasing pH.
鈴鹿工業高等専門学校の論文
2004-02-10