期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 315, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2020.113769
关键词
Nanocomposite; Heavy metals; Adsorption kinetics; Isotherm; Water treatment
资金
- National Research Foundation of Korea (NRF) under the Korea Research Fellowship (KRF) program [2019H1D3A1A01102657]
Herein, we showed that the graphene oxide with manganese ferrite (GO-MnFe2O4) possess great adsorption properties for the selective Pb2+ ions removal from the aqueous medium. Nanocomposite adsorbent was developed by one-pot hydrothermal method, using graphene oxide as a supporting material to minimize the aggregation of MnFe2O4. Also, GO possesses important role in the adsorption mechanism of Pb2+ through electrostatic/ionic interactions. The characterizations such as FT-IR, XPS, P-XRD, FE-SEM, and BET of the synthesized nanocomposite were carried out to assess the different properties such as functionalities, crystallinity, morphology, and surface area value, respectively. Thereafter, the adsorption performance of GO-MnFe2O4 nanocomposite was tested for the Pb2+ at various adsorption parameters including to contact time, solution pH, adsorbent dose, and concentration of initial Pb2+ in order to measure the optimum adsorption condition. Kinetic experiments suggest that the equilibrium attained in 30 min and followed a pseudo-second-order kinetic model. Adsorption isotherm model followed to Langmuir isotherms and gives a maximum adsorption capacity of 621.11 mg/g. The reusability tests exhibited good durability and good efficiency for repeated Pb2+ adsorptions with GO-MnFe2O4 nanocomposite. These results demonstrated that the GO-MnFe2O4 nanocomposite may be an attractive adsorbent having low-cost for the effectively Pb+2 removal of from the polluted water. (C) 2020 Published by Elsevier B.V.
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