Sorption behaviour of 137Cs and 152+154Eu onto bentonite phosphate modified with nickel: kinetics, isotherms, and chromatographic column application

被引:4
作者
Abass, Mohamed R. [1 ]
Mahrous, Sara S. [2 ]
Mansy, Muhammad S. [3 ,4 ]
机构
[1] Egyptian Atom Energy Author, Hot Labs & Waste Management Ctr, Nucl Fuel Technol Dept, Cairo, Egypt
[2] Egyptian Atom Energy Author, Environm Radioact Pollut Dept, Hot Labs & Waste Management Ctr, Cairo, Egypt
[3] Egyptian Atom Energy Author, Analyt Chem & Control Dept, Hot Labs & Waste Management Ctr, Cairo, Egypt
[4] Egyptian Atom Energy Author, Radioact Waste Management Unit, Hot Labs & Waste Management Ctr, Cairo, Egypt
关键词
Cs-137; Eu152+154; column; desorption; isotherm; low-level radioactive waste; RADIOACTIVE-WASTE; REMOVAL; IONS; RADIONUCLIDES; LANTHANIDES; ADSORPTION; SEPARATION; COMPOSITE; ADSORBENT; OXIDE;
D O I
10.1515/ract-2023-0168
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Using batch and column procedures, the present work investigated the sorption behaviour of Cs-137 and Eu152+154 by bentonite phosphate modified with nickel (BPN) sorbent. The kinetic data obey pseudo-1(st)-order for Cs-137 and follow pseudo-(2nd)-order for Eu152+154. Various sorption isotherm models were used to analyze equilibrium data. The thermodynamic functions reflect an endothermic and spontaneous sorption process. HCl (about 95.35 %) and CaCl2 (about 98.13 %) showed the optimum eluents for the complete recovery of both Cs-137 and Eu152+154, respectively. Finally, column data show that Cs-137 and Eu152+154 may be loaded on BNP sorbent and separated from an aqueous solution using a variety of HCl concentrations as eluent. The obtianed results revealed that BNP sorbent is suitable for recovering Cs-137 and Eu152+154 from low-level radioactive waste effluents (LLW).
引用
收藏
页码:13 / 21
页数:9
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