Interaction between AlO and different sizes of GO in aqueous environment.

Xia Liu, Xuetao Xu, Ju Sun, Shengxia Duan, Yubing Sun, Tasawar Hayat, Jiaxing Li

Journal: Environmental pollution (Barking, Essex : 1987) 2018;243(Pt B):1802-1809

PMID: 30408867

Full Text on Elsevier Science View on PubMed

Abstract

Although the aggregation of graphene oxide (GO) has been widely researched, the influence of the GO size on the homoaggregation behavior and its interaction with environmental media are still unexplored. In this work, critical coagulation concentration (CCC) values for GO with different sizes, from micro to nanosheet, were measured with NaCl and CaCl electrolytes, and the results indicated that GO with the largest size presented the smallest CCC value. Aluminum oxide (AlO) was selected as a natural solid particle representative to mimic the interaction between GO and environmental media. Batch experiments were conducted in solution with different pH and ionic strength. Results indicated that the attachment capacity of large GO onto AlO particles was greater than that of small GO. The experimental data were well fitted with Freundlich model. The electrostatic attraction and hydrogen-bonding interaction dominated the interaction process between GO and AlO. These findings are important for better understanding in the environmental fate and transport of GO.

Address: CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China.; School of Chemical and Environmental Engineering, Wuyi University, Jiangmen 529020, China.; NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.; CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. Electronic address: [email protected].

DOI: 10.1016/j.envpol.2018.10.010

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MeSH Terms: Aluminum Oxide, Environment, Graphite, Hydrogen Bonding, Oxides, Sodium Chloride, Water