CAJ | 학술논문

采用静态批式法研究了Th(Ⅳ)在高庙子膨润土上的吸附行为.探讨了接触时间、pH、离子强度、固液比以及腐殖酸对吸附的影响.测定了293.15 K下的吸附等温线.实验结果表明,pH和离子强度对Th(Ⅳ)吸附的影响很大,腐殖酸在低pH下促进Th(Ⅳ)在高庙子膨润土上的吸附,而在高pH下几乎没有影响;Th(Ⅳ)在高庙子膨润土上的吸附主要通过表面络合和离子交换进行;Langmuir方程可以很好的拟合吸附等温线.
채용정태비식법연구료Th(Ⅳ)재고묘자팽윤토상적흡부행위.탐토료접촉시간、pH、리자강도、고액비이급부식산대흡부적영향.측정료293.15 K하적흡부등온선.실험결과표명,pH화리자강도대Th(Ⅳ)흡부적영향흔대,부식산재저pH하촉진Th(Ⅳ)재고묘자팽윤토상적흡부,이재고pH하궤호몰유영향;Th(Ⅳ)재고묘자팽윤토상적흡부주요통과표면락합화리자교환진행;Langmuir방정가이흔호적의합흡부등온선.
Sorption of Th(Ⅳ) on GMZ bentonite as a function of pH, ionic strength and Th(Ⅳ) concentrations was studied under ambient condition using batch technique. The results indicate that the sorption of Th(Ⅳ) on GMZ bentonite is strongly affected by pH values (1.5-7.5) and ionic strength. The presence of humic acid increases the sorption of Th(Ⅳ) on GMZ bentonite at low pH, whereas no obvious effect is found at high pH. The sorption of Th(Ⅳ) is dominated by surface complexation and ion exchange. The sorption isotherm of Th(Ⅳ) on GMZ bentonite can be described well by Langmuir model.