Preparation of MnO2-modified graphite sorbents from spent Li-ion batteries for lead, cadmium and silver contaminated water treatment.

Author(s) Zhao, T.; Yao, Y.; Wang, M.; Chen, R.; Yu, Y.; Wu, F.; Zhang, C.
Journal ACS Appl Mater Interfaces
Date Published 2017 Jul 05

A novel adsorbent was prepared via grafting MnO2 particles on graphite recovered from spent Lithium-ion batteries for removal of lead, cadmium and silver ions from aqueous solution. It is the first time that spent LIBs anode material was recovered and applied to heavy metal contaminated wastewater treatment. Characterizations using SEM, EDX and FTIR showed that the adsorbent surface was coated with MnO2 ultrafine particles, which could serve as the main adsorption mechanism as to remove heavy metal ions. In comparison to the raw artificial graphite (AG) powder, the MnO2-modified AG (MnO2-AG) exhibited a markedly improved removal capacity toward Pb(II), Cd(II) and Ag(I) and their removal rates reached as high as 99.9%, 79.7% and 99.8%.respectively. The removal of the heavy metals by MnO2-AG was mainly through ion exchange of hydroxyl groups. This study provides the possibility of synthesis efficient adsorbent by reusing the "waste" such as spent Li-ion batteries. It is an economic and environmental-friendly approach for both heavy metal contaminated water treatment and waste recycling.

DOI 10.1021/acsami.7b07882
ISSN 1944-8252
Citation ACS Appl Mater Interfaces. 2017.

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