SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 44 ›› Issue (4): 20-28.DOI: 10.1016/j.cjche.2021.05.009

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Recovery of lithium using H4Mn3.5Ti1.5O12/reduced graphene oxide/polyacrylamide composite hydrogel from brine by Ads-ESIX process

Jingsi Cui, Huanxi Xu, Yanfeng Ding, Jingjing Tian, Xu Zhang, Guanping Jin   

  1. Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
  • 收稿日期:2020-12-10 修回日期:2021-05-14 出版日期:2022-04-28 发布日期:2022-06-18
  • 通讯作者: Xu Zhang,E-mail:zhangx@hfut.edu.cn;Guanping Jin,E-mail:zhangx@hfut.edu.cn
  • 基金资助:
    This work was supported by the Ministry of Science and Technology of China (Science and Technology to Boost Economy 2020 Key Project, SQ2020YFF0412719 and SQ2020YFF0404901). The Key Research and Development and Transformation Program Funding in Qinghai Province (2021-GX-105). Anhui Province Key Research and Development Plan (1804e03020316).

Recovery of lithium using H4Mn3.5Ti1.5O12/reduced graphene oxide/polyacrylamide composite hydrogel from brine by Ads-ESIX process

Jingsi Cui, Huanxi Xu, Yanfeng Ding, Jingjing Tian, Xu Zhang, Guanping Jin   

  1. Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
  • Received:2020-12-10 Revised:2021-05-14 Online:2022-04-28 Published:2022-06-18
  • Contact: Xu Zhang,E-mail:zhangx@hfut.edu.cn;Guanping Jin,E-mail:zhangx@hfut.edu.cn
  • Supported by:
    This work was supported by the Ministry of Science and Technology of China (Science and Technology to Boost Economy 2020 Key Project, SQ2020YFF0412719 and SQ2020YFF0404901). The Key Research and Development and Transformation Program Funding in Qinghai Province (2021-GX-105). Anhui Province Key Research and Development Plan (1804e03020316).

摘要: Powdery Li+-imprinted manganese oxides adsorbent was widely used to the recovery of Li+, but there are some difficulties, such as poor stability in acid solution, inconvenience of operation and separation. In this work, a useful hydrogel composite based H4Mn3.5Ti1.5O12/reduced graphene oxide/polyacrylamide (HMTO-rGO/PAM) was fabricated by thermal initiation method with promising stable, conductive and selective properties. The resulting materials were characterized by field emission scanning electron microscope, infrared absorption spectrum, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical techniques. The recovery of Li+ was investigated using HMTO-rGO/PAM from brine by a separated two-stage sorption statically and electrically switched ion exchange desorption process. The adsorption capacity of 51.5 mg·g-1 could be achieved with an initial Li+ concentration of 200 mg·L-1 in pH 10, at 45 ℃ for 12 h. Li+ ions could be quickly desorbed by cyclic voltammetry (CV) in pH 3, 0.1 mol·L-1 HCl/NH4Cl accompanying the exchange of Li+ and H+(NH4+) and the transfer of LMTO-rGO/PAM to HMTO-rGO/PAM.

关键词: Lithium recovery, Titanium doped lithium ion sieve, Hydrogel, Adsorption-electrically switched ion exchange (Ads-ESIX)

Abstract: Powdery Li+-imprinted manganese oxides adsorbent was widely used to the recovery of Li+, but there are some difficulties, such as poor stability in acid solution, inconvenience of operation and separation. In this work, a useful hydrogel composite based H4Mn3.5Ti1.5O12/reduced graphene oxide/polyacrylamide (HMTO-rGO/PAM) was fabricated by thermal initiation method with promising stable, conductive and selective properties. The resulting materials were characterized by field emission scanning electron microscope, infrared absorption spectrum, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical techniques. The recovery of Li+ was investigated using HMTO-rGO/PAM from brine by a separated two-stage sorption statically and electrically switched ion exchange desorption process. The adsorption capacity of 51.5 mg·g-1 could be achieved with an initial Li+ concentration of 200 mg·L-1 in pH 10, at 45 ℃ for 12 h. Li+ ions could be quickly desorbed by cyclic voltammetry (CV) in pH 3, 0.1 mol·L-1 HCl/NH4Cl accompanying the exchange of Li+ and H+(NH4+) and the transfer of LMTO-rGO/PAM to HMTO-rGO/PAM.

Key words: Lithium recovery, Titanium doped lithium ion sieve, Hydrogel, Adsorption-electrically switched ion exchange (Ads-ESIX)