期刊论文

Xia, L.-S.

中文

原子能科学技术

1000-6931

2013

47

11

1944-1950

10.7538/yzk.2013.47.11.1944

湖南省高等学校科学研究重点项目资助（12A120）；

本校为第一且通讯机构

通过静态吸附实验,研究了pH值、吸附时间、铀初始质量浓度、吸附剂用量等因素对凹凸棒石及凹凸棒石与硫酸亚铁协同吸附铀的影响,从热力学和动力学方面对吸附过程进行了分析,并通过红外光谱(IR)和扫描电镜(SEM)探讨了其吸附机理。结果表明,当温度为25℃、pH值为5.0、凹凸棒石投加量为15 g/L、铀初始质量浓度为100 mg/L、吸附反应30 min时,凹凸棒石对UO_2~(+2)的吸附率达89.5%,饱和吸附量可达40.8 m g/g以上;加硫酸亚铁后,凹凸棒石和硫酸亚铁协同吸附铀的效果大幅提高,在25℃、pH值为6.5、凹凸棒石用量20 g/L、FeSO_4用量1 g/L、铀初始质量浓度为100 mg/L、吸附时间30 min时,凹凸棒石和硫酸亚铁协...

By static adsorption experiments, the effects of pH, adsorption time, uranium's initial concentration and adsorbent dosage were studied on biosorption capacity of attapulgite and cooperative adsorption of attapulgite and ferrous sulfate for uranium. The adsorption process was analyzed in thermodynamics and kinetics, and the adsorption mechanism was analyzed by infrared spectroscopy and scanning electron microscope. The results show that the adsorption rate of attapulgite on UO22+ reaches 89.5% and the saturated adsorption capacity of attapulgite is up to 40.8 mg/g in 30 min at 25 °C, pH=5....