화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.95, 57-65, March, 2021
DOI10.1016/j.jiec.2020.12.003  Export Citation
Oxalated blast-furnace slag for the removal of Cobalt(II) ions from aqueous solutions
Quynh Thi Ngoc Le, Eleazer L. Vivas, and Kuk Cho†
  • Department of Environmental Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
E-mail:
This study showcases an original blast-furnace slag, an industrial waste material, successfully and readily converted into Slag-Oxalate (Slag-Ox) to capture Co2+. The obtained material exhibited a fast adsorption rate and a maximum adsorption capacity of 576 mg/g, which is the highest Co2+ adsorption capacity achieved to date. The adsorption kinetics and isotherms of Slag-Ox for Co2+ were well-fitted by the pseudo-second order and Sips models, respectively. Ion exchange between Ca2+ and Co2+ was the main adsorption mechanism. Slag-Ox exhibited stable adsorption performance at pH 5.9 and was chemically stable at wider pH ranges. As the temperature increased, the adsorption capacity also increased. Furthermore, Slag-Ox removed Cs+ and Sr2+ ions from multi-metal aqueous solutions, revealing its potential for the remediation of radiocesium- and radiostrontium-contaminated waters. Overall results demonstrated that Slag-Ox is an effective and low-cost cobalt adsorbent and highlighted that waste material recycling will contribute to the betterment of industrial waste management.
Keywords:Co;Ion exchange;Radioactivity;Radionuclides;Sorption
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