Constructing porous ZnFC-PA/PSF composite spheres for highly efficient Cs removal.

Journal: Journal of environmental sciences (China)
PMID: 38644011

Abstract

Radioisotope leaking from nuclear waste has become an intractable problem due to its gamma radiation and strong water solubility. In this work, a novel porous ZnFC-PA/PSF composite sphere was fabricated by immobilization of ferrocyanides modified zinc phytate into polysulfone (PSF) substrate for the treatment of Cs-contaminated water. The maximum adsorption capacity of ZnFC-PA/PSF was 305.38 mg/g, and the removal efficiency of Cs was reached 94.27% within 2 hr. The ZnFC-PA/PSF presented favorable stability with negligible dissolution loss of Zn and Fe (< 2%). The ZnFC-PA/PSF achieved high-selectivity towards Cs (K = 2.24×10 mL/g) even in actual geothermal water. The adsorption mechanism was inferred to be the ion-exchange between Cs and K. What's more, ZnFC-PA/PSF worked well in the fixed-bed adsorption (E = 91.92%), indicating the application potential for the hazardous Cs removal from wastewater.

Authors

  • Senjian Han
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin 300457, China. Electronic address: senjhan@tust.edu.cn.
  • Chao Gao
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China.
  • Wenfeng Yan
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China.
  • Yafei Guo
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin 300457, China.
  • Shiqiang Wang
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin 300457, China. Electronic address: wangshiqiang@tust.edu.cn.
  • Tianlong Deng
    College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Marine Resource Chemistry and Food Technology, Ministry of Education, Tianjin 300457, China.

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