Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics

doi:10.1016/j.cjche.2015.08.011

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (10): 1620-1626.DOI: 10.1016/j.cjche.2015.08.011

Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics

Zhicheng Chu, Junsheng Liu, Chengliang Han

Key Laboratory of Membrane Materials & Processes, Department of Chemical and Materials Engineering, Hefei University, Hefei 230601, China

收稿日期:2014-12-25 修回日期:2015-05-19 出版日期:2015-10-28 发布日期:2015-11-27
通讯作者: Junsheng Liu
基金资助:
Supported by the National Natural Science Foundation of China (21376059), the Priority Construction Discipline of Education Department of Anhui Province, and the Key Discipline of Hefei University (2014xk01).

Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics

Zhicheng Chu, Junsheng Liu, Chengliang Han

Key Laboratory of Membrane Materials & Processes, Department of Chemical and Materials Engineering, Hefei University, Hefei 230601, China

Received:2014-12-25 Revised:2015-05-19 Online:2015-10-28 Published:2015-11-27
Supported by:
Supported by the National Natural Science Foundation of China (21376059), the Priority Construction Discipline of Education Department of Anhui Province, and the Key Discipline of Hefei University (2014xk01).

摘要/Abstract

摘要： The removal of radionuclide from radioactive wastewater has captured much attention. Strontium-90 is one of the major radionuclides. To develop a new type of adsorbents to remove strontium ions from the radioactive wastewater, in this study, novel hybrid membranes were prepared and characterized. The adsorption kinetics, thermodynamic parameters of ΔG, ΔH and ΔS, as well as surface SEM and EDS images were used to investigate the removal of strontium ions from stimulated radioactive wastewater using the previously prepared hybrid membranes as efficient adsorbents. The study of kinetic model confirmed that the adsorption of strontium ions on these hybrid membranes followed the Lagergren pseudo-second order model. Moreover, it was proved that the adsorption of strontium ions on these samples was solely controlled by intraparticle diffusion. The negative values of ΔG and the positive values of ΔH indicated that the adsorption of strontium ions on samples A-D is a spontaneous and endothermic process in nature. Furthermore, surface SEM and DES images give significant evidence to confirm the existence of strontiumions on the surface of the adsorbed samples. These findings demonstrate that these hybrid membranes are promising adsorbents for the removal of strontium ions from aqueous solution and can be potentially applied in the adsorptive separation of radionuclides from the radioactive wastewater.

关键词: Membrane, Adsorption, Kinetics, Strontium removal, Adsorbent

Abstract: The removal of radionuclide from radioactive wastewater has captured much attention. Strontium-90 is one of the major radionuclides. To develop a new type of adsorbents to remove strontium ions from the radioactive wastewater, in this study, novel hybrid membranes were prepared and characterized. The adsorption kinetics, thermodynamic parameters of ΔG, ΔH and ΔS, as well as surface SEM and EDS images were used to investigate the removal of strontium ions from stimulated radioactive wastewater using the previously prepared hybrid membranes as efficient adsorbents. The study of kinetic model confirmed that the adsorption of strontium ions on these hybrid membranes followed the Lagergren pseudo-second order model. Moreover, it was proved that the adsorption of strontium ions on these samples was solely controlled by intraparticle diffusion. The negative values of ΔG and the positive values of ΔH indicated that the adsorption of strontium ions on samples A-D is a spontaneous and endothermic process in nature. Furthermore, surface SEM and DES images give significant evidence to confirm the existence of strontiumions on the surface of the adsorbed samples. These findings demonstrate that these hybrid membranes are promising adsorbents for the removal of strontium ions from aqueous solution and can be potentially applied in the adsorptive separation of radionuclides from the radioactive wastewater.

Key words: Membrane, Adsorption, Kinetics, Strontium removal, Adsorbent

Zhicheng Chu, Junsheng Liu, Chengliang Han. Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics[J]. Chinese Journal of Chemical Engineering, 2015, 23(10): 1620-1626.

Zhicheng Chu, Junsheng Liu, Chengliang Han. Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics[J]. Chin.J.Chem.Eng., 2015, 23(10): 1620-1626.

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Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics

Removal of strontium ions from aqueous solution using hybrid membranes: Kinetics and thermodynamics

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