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Highly Efficient Removal of Suspended Solid Pollutants from Wastewater by Magnetic Fe 3 O 4 ‐Graphene Oxides Nanocomposite
Author(s) -
Wu Yuchen,
Jiang Gaopeng,
Cano Zachary P.,
Liu Guihua,
Liu Wenwen,
Feng Kun,
Lui Gregory,
Zhang Zisheng,
Chen Zhongwei
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802148
Subject(s) - nanocomposite , settling , adsorption , materials science , graphene , chemical engineering , magnetic nanoparticles , oxide , wastewater , freundlich equation , hydrothermal circulation , suspension (topology) , langmuir adsorption model , nanoparticle , nanotechnology , environmental engineering , chemistry , metallurgy , organic chemistry , mathematics , homotopy , pure mathematics , engineering
In this work, the magnetic Fe 3 O 4 ‐graphene oxide (Fe 3 O 4 ‐GO) nanocomposite is synthesized via a facile one‐pot hydrothermal method and used for settling down and removing solid suspended particles in wastewater. Physicochemical characterizations not only confirm the successful in‐situ deposition of magnetic Fe 3 O 4 nanoparticles on GO nanosheets, but also disclose the strong interaction between them. The Fe 3 O 4 ‐GO nanocomposite demonstrates an excellent capability of accelerating the settling process in the presence of magnetic field. It can reduce the Kaolinite solid particle concentration by an order of magnitude within 30 minutes, which is one time faster than that in the absence of magnetic field. The solid suspension absorbing behavior on the Fe 3 O 4 ‐GO nanocomposite in the presence of magnetic field is found to fit with Langmuir and Freundlich isotherm models and the pseudo‐second‐order kinetic model. The calculated adsorption capacity reaches 58.46 mg⋅mg −1 , and the initial adsorption rate reaches as high as 0.0275 mg⋅mg −1 ⋅min −1 . The Fe 3 O 4 ‐GO nanocomposite is proved to be an effective, efficient and promising magnetic coagulant for the rapid treatment of solid suspended particles in wastewater and natural water.