期刊论文

Xia, L.-S.

中文

核化学与放射化学

0253-9950

2009

31

3

173-178

国家自然科学基金资助项目（10675059）；

本校为其他机构

通过吸附动力学实验及等温吸附实验,研究了20～50 ℃榕树叶-活性污泥协同曝气吸附铀的热动力学性质.结果表明,调节pH=3.0,吸附时间60 min,榕树叶-活性污泥体系对初始质量浓度为100 mg/L的UO_2~(2+)的吸附率超过99%,室温20 ℃下最大吸附量达到13.055 mg/g.吸附动力学过程可用准二级吸附速率方程来描述,计算值与实测值吻合良好,相关系数达0.99以上.吸附平衡符合Langmuir和Freundlich等温吸附方程,相关系数都大于0.98,体现了单层吸附与多层覆盖相结合的吸附模式;求得反应的ΔH~(θ)=-45.2 kJ/mol, ΔS~(θ)=-46.2 J/(mol·K), ΔG~(θ)分别为-31.7(20 ℃), -31.2(30 ℃), -30.7(40 ℃), -30.3(50 ℃...

Synergistic aeration adsorption of uranium from aqueous solution using banyan leaves (BL) and activated sludge (AS) was investigated by thermodynamic and kinetics batch experiments in the temperature range of 20-50°C. The results show that the adsorption ratio of U(VI) with the initial concentration of 100 mg/L on BL-AS is more than 99%, and the maximal adsorption capacity is 13.055 mg/g for 60 min, at pH=3.0 and 20°C. Pseudo 2nd-order model best describes the reaction kinetics; the adsorption capacity calculated by the model is consistent wi...