Electrochemical recovery of cobalt using nanoparticles film of copper hexacyanoferrates from aqueous solution.
作者： Xinxin Long , Rongzhi Chen , Jihua Tan , Yifeng Lu , Jixiang Wang
DOI: 10.1016/J.JHAZMAT.2019.121252
关键词:
摘要: Abstract Nanoparticles film of copper metal hexacyanoferrates (CuHCF) was fabricated to electrochemically separate Co2+ in aqueous solutions under various conditions such as applied potential, solution pHs, initial concentrations, contact time and coexisting ions. Results showed that the removal efficiency conducted reduction potential obviously higher than oxidation potential. The optimal pH for adsorption occurred at 8.0. Coexisting ions studies revealed could be removed from containing Li+, Cu2+ Al3+. Considering cobalt lithium are main metallic elements LiCoO2, effect different ionic strengths (IS) LiNO3 (0.5, 1, 2, 5, 10) on further investigated. IS had little impact Co2+, which indicated selective recovery LiCoO2 spent lithium-ion batteries. X-ray energy-dispersion spectroscopy (EDS) confirmed adsorbed effectively onto CuHCF film. well described by Langmuir isotherm maximum sorption capacity is 218.82 mg/g. kinetic rate rapid initially attained equilibrium within 60 min, data fitted Redlich-Peterson Elovich model, implying a chemisorption dominated process.
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