铝皂石胶体对Cs(Ι)的吸附性能研究

摘要/Abstract

摘要： 以铝皂石胶体为原料,用静态吸附的方法,通过计算吸附量和吸附率,探讨铝皂石胶体吸附Cs⁺时,吸附时间、胶体溶液pH值、溶液中的离子浓度、腐殖酸(HA)的投加量以及吸附时的温度对吸附效果的影响。结果表明:1 mL 300 μg/mL的Cs⁺溶液加入9 mL饱和铝皂石胶体溶液,吸附时间为20 min、溶液pH值为7,腐殖酸(HA)的投加量为3 mg,温度为45 ℃时,铝皂石胶体对Cs⁺的吸附效果最好。溶液中阴阳离子对吸附的抑制作用顺序分别为:CO₃^2-＞HCO₃^-＞NO₃^-＞SO₄^2-,Ca²⁺＞Mg²⁺＞K⁺。铝皂石胶体对Cs⁺的吸附过程符合准二级动力学方程和Langmuir热力学模型,是一个自发吸热的过程。

关键词: 铝皂石胶体, Cs⁺, 吸附量, 吸附率, 吸附性能

Abstract: The influence of adsorption time, pH value of solution, ions concentration in solution, humic acid (HA) amount and temperature on the adsorption effect were explored by calculating the adsorption amount and adsorption rate of aluminum saponite colloid for Cs⁺. The results showed that the adsorption effect of aluminum saponite colloid on Cs⁺ was best at the conditions of 20 minutes of adsorption time, 7 of solution pH, 3 mg of HA amount and 45 ℃ of temperature. The inhibitory effects of anions and cations on adsorption in the solution were:CO₃^2-> HCO₃^-> NO₃^-> SO₄^2-, Ca²⁺> Mg²⁺> K⁺. The adsorption process of Cs⁺ by aluminum saponite colloid conforms to the quasi-second-order kinetic equation and Langmuir thermodynamic model, which is a spontaneous endothermic process.

Key words: aluminum saponite colloid, Cs⁺, adsorption amount, adsorption rate, adsorption ability

中图分类号:

TL941

赵玉婷, 潘跃龙, 刘羽, 冷阳春. 铝皂石胶体对Cs(Ι)的吸附性能研究[J]. 辐射防护, 2020, 40(5): 427-434.

ZHAO Yuting, PAN Yuelong, LIU Yu, LENG Yangchun. Study on adsorption properties of aluminite colloid for Cs⁺[J]. RADIATION PROTECTION, 2020, 40(5): 427-434.

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