Comparison of Nature and Synthetic Zeolite for Waste Battery Electrolyte Treatment in Fixed-Bed Adsorption Column

Cong Yang, Yifei Wang and Abdullatif Alfutimie
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Cong Yang: Department of Chemical Engineering and Analytical Science, Faculty of Science and Engineering, The University of Manchester, Manchester M1 3BB, UK
Yifei Wang: School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Abdullatif Alfutimie: Department of Chemical Engineering and Analytical Science, Faculty of Science and Engineering, The University of Manchester, Manchester M1 3BB, UK

Energies, 2022, vol. 15, issue 1, 1-14

Abstract: To support a sustainable energy development, CO 2 reduction for carbon neutralization and water-splitting for hydrogen economy are two feasible technical routes, both of which require a significant input of renewable energies. To efficiently store renewable energies, secondary batteries will be applied in great quantity, so that a considerable amount of energy needs to be invested to eliminate the waste battery electrolyte pollution caused by heavy metals including Cu 2+ , Zn 2+ and Pb 2+ . To reduce this energy consumption, the removal behaviors of these ions by using clinoptilolite and zeolite A under 5, 7 and 10 BV h −1 in a fixed-bed reactor were investigated. The used zeolites were then regenerated by a novel NH 4 Cl solution soaking, coupled with the ultrasonication method. Further characterizations were carried out using scanning electron microscopy, N 2 adsorption and desorption test, and wide-angle X-ray diffraction. The adsorption breakthrough curves revealed that the leaching preference of clinoptilolite was Pb 2+ > Cu 2+ > Zn 2+ , while the removal sequence for zeolite A was Zn 2+ > Cu 2+ > Pb 2+ . The maximum removal percentage of Zn 2+ ions for clinoptilolite under 5 BV h −1 was 21.55%, while it was 83.45% for zeolite A. The leaching ability difference was also discussed combining with the characterization results. The fact that unit cell stayed the same before and after the regeneration treatment approved the efficacy of the regeneration method, which detached most of the ions while doing little change to both morphology and crystallinity of the zeolites. By evaluating the pH and conductivity changes, the leaching mechanisms by adsorption and ion exchange were further studied.

Keywords: fixed-bed column; zeolite; ultrasonication; heavy metal pollution; electrolyte post-treatment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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