Journal
ACS OMEGA
Volume 1, Issue 3, Pages 417-423Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.6b00073
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Funding
- National Natural Science Foundation of China (NSFC) [51402018]
- National Key Program for Basic Research of China [2015CB251100]
- U.S. Department of Energy [DE-AC0206CH11357]
- Vehicle Technologies Office (VTO)
- Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE)
- U.S. Department of Energy under U.S.-China Clean Energy Research Center for Clean Vehicles (CERC-CVC)
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The potential application of a carbon nanocomposite from battery anode materials modified with magnesium (Mg) was explored to remove phosphate from aqueous solutions. Thermogravimetric analysis (TGA) shows that the Mg content of the prepared Mg/C composite is around 23.5%. Laboratory batch adsorption kinetics and equilibrium isotherm experiments demonstrate that the composite has an extremely high phosphate adsorption capacity of 406.3 mg PO4/g, which is among the highest phosphate removal abilities reported so far. Results from XRD, SEM-EDX, and XPS analyses of the postsorption Mg/C composite indicate that phosphate adsorption is mainly controlled by the precipitation of P to form Mg-3(PO4)(2)center dot 8H(2)O and MgHPO4 center dot 1.2H(2)O nanocrystals on the surface of the adsorbent. The approach of synthesizing Mg-enriched carbon-based adsorbent described in this work provides new opportunities for disposing spent batteries and developing a low-cost and highefficiency adsorbent to mitigate eutrophication.
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