Electrospinning Preparation of NaA Zeolite Composite Polyacrylonitrile Membranes (NaA@PANMs) and Studying on Adsorption Performance for Sr.

Journal: Environmental research
Published Date: May 7, 2025

Abstract

The NaA zeolite exhibits excellent adsorption performance for Sr in radioactive nuclear wastewater. However, the efficient and simple fabrication of NaA into membrane materials remains a critical challenge for its industrial application. In this study, NaA zeolite was uniformly blended with polyacrylonitrile (PAN) to prepare a novel hydrophilicity NaA zeolite composite PAN membrane (NaA@PANMs) via electrospinning technology. A comprehensive analytical characterization was conducted employing a range of techniques, including SEM-EDS, BET, XRD and FT-IR. The oxidation of NaA@PANMs at 200 °C resulted in enhanced mechanical strength and stability in warm water (75 °C), along with the acquisition of superior physicochemical properties. In addition, the batch experimental adsorption experiments showed that NaA@PANMs had a high adsorption capacity for Sr ions, reaching 59.10 mg/g (removal rate of 98.50 %) at pH 6, with a maximum adsorption capacity of 85.21 mg/g at 298 K. The adsorption kinetics and thermodynamics were respectively consistent with pseudo-second-order and the Langmuir isotherm model. In the presence of coexisting ions, the K values of NaA@PANMs for Sr were 3.8, 7.1, and 22.0 times higher than those for Ca, Mg, and K, respectively. Additionally, 0.9 g NaA@PANMs demonstrated excellent dynamic adsorption performance for Sr solutions at a flow rate of 0.25 mL/min. Moreover, the NaA@PANMs can still maintain surface integrity and excellent adsorption performance following irradiation at 300 kGy. The removal rate exceeding 70.00 % after three desorption cycles furtherly indicates potential application for the removal of Sr in actual nuclear wastewater.

Authors

  • Yu Liu
    Research Center of Information Technology, Beijing Academy of Agriculture and Forestry Science, Beijing, China.
  • Min Yi
    Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China.
  • Tao Han
    Food Science and Engineering College, Beijing University of Agriculture, Beijing, 102206, China.
  • Xinlong Li
    School of Resources, Environment and Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004 Guangxi, P. R. China.
  • Linqiao Qin
    School of Resources, Environment and Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004 Guangxi, P. R. China.
  • Yu She
    School of Resources, Environment and Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004 Guangxi, P. R. China.
  • Erna Wei
    Guangxi Beitou Industrial Co., Ltd, Nanning 530004 Guangxi, China.
  • Kaituo Wang
    School of Resources, Environment and Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004 Guangxi, P. R. China. Electronic address: wangkaituo@gxu.edu.cn.

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