期刊论文

Xia, L.-S.

中文

原子能科学技术

1000-6931

2013

47

10

1692-1699

10.7538/yzk.2013.47.10.1692

国家自然科学基金资助项目（10975070）； 湖南省高等学校科学研究项目资助（12A120）；

本校为第一且通讯机构

采用静态法研究了某铀矿山附近土壤中的红壤胶体在不同pH值、离子强度、吸附平衡时间、铀溶液初始浓度、胶体用量、胶体粒径和有机质条件下对U (Ⅵ)的吸附影响,从热力学和动力学方面对吸附过程进行了分析,并通过元素分析、红外光谱(FT-IR)和扫描电镜(SEM)对吸附机理进行了初步探讨。实验结果表明:离子强度越小,胶体粒径越小,胶体对U(Ⅵ)的吸附量越大;单位质量红壤胶体对铀的吸附量随铀初始质量浓度的增大而增大,随红壤胶体用量的增大而减少;在25℃、pH值为3.5、离子强度为0.001 mol/L时,粒径小于1μm的红壤胶体的饱和吸附量q_(max)为76.76μg/mg。红壤胶体吸附铀酰离子前后的红外光谱表明,与吸附...

By static adsorption experiments, the effects of pH, ionic strength, adsorption time, uranium initial concentration, adsorbent dosage, red soil-colloid size, and organic matters on the biosorption capacity of red soil-colloid extracted from the soil around uranium tailing for uranium were studied. The adsorption process was analyzed by thermodynamics and kinetics, and the adsorption mechanism was characterized by the element analysis, infrared spectroscopy and scanning electron microscopy. The results show that the adsorption capacity for U(VI) on red soil-colloid increases with the decrease o...