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Mesocarbon Microbead Carbon-Supported Magnesium Hydroxide Nanoparticles: Turning Spent Li-ion Battery Anode into a Highly Efficient Phosphate Adsorbent for Wastewater Treatment
journal contribution
posted on 2016-07-27, 00:00 authored by Yan Zhang, Xingming Guo, Feng Wu, Ying Yao, Yifei Yuan, Xuanxuan Bi, Xiangyi Luo, Reza Shahbazian-Yassar, Cunzhong Zhang, Khalil AminePhosphorus in water eutrophication
has become a serious problem threatening the environment. However,
the development of efficient adsorbents for phosphate removal from
water is lagging. In this work, we recovered the waste material, graphitized
carbon, from spent lithium ion batteries and modified it with nanostructured
Mg(OH)2 on the surface to treat excess phosphate. This
phosphate adsorbent shows one of the highest phosphate adsorption
capacities to date, 588.4 mg/g (1 order of magnitude higher than previously
reported carbon-based adsorbents), and exhibits decent stability.
A heterogeneous multilayer adsorption mechanism was proposed on the
basis of multiple adsorption results. This highly efficient adsorbent
from spent Li-ion batteries displays great potential to be utilized
in industry, and the mechanism study paved a way for further design
of the adsorbent for phosphate adsorption.