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Recovery of lithium using H_(4)Mn_(3.5)Ti_(1.5)O_(12)/reduced graphene oxide/polyacrylamide composite hydrogel from brine by Ads-ESIX process

查看全文 作　　者：Jingsi [1]Cui;Huanxi [1]Xu;Yanfeng [1]Ding;Jingjing [1]Tian;Xu [1]Zhang;Guanping [1]Jin 高影响力作者 机构地区：[1]Anhui Key Lab of Controllable Chemical Reaction&Material Chemical Engineering,School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China高影响力机构 出　　处：《Chinese Journal of Chemical Engineering》索引2022年第35卷第4期,共9页高影响力期刊 基　　金：supported by the Ministry of Science and Technology of China(Science and Technology to Boost Economy 2020Key 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 H_(4)Mn_(3.5)Ti_(1.5)O_(12)/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/NH;Cl accompanying the exchange of Li^(+)and H+(NH;)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)
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