Batch desalination of Gulf of Oman diluted salt water using newly prepared graphene oxide–copper oxide nanocomposite

In this study, graphene oxide–copper oxide (GO–CuO) based efficient nanocomposite was synthesized for the enhanced desalination of Gulf of Oman saline water. The adsorbent was characterized by Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray...

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Bibliographic Details
Published in:Desalination and water treatment 2018-11, Vol.133, p.80-91
Main Authors: Khabbazi, Maryam, Eslami, Parvin Alizadeh
Format: Article
Language:English
Subjects:
Adsorption isotherm
CuO nanoparticles
Graphene oxide
Kinetic study
Seawater desalination
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Summary:In this study, graphene oxide–copper oxide (GO–CuO) based efficient nanocomposite was synthesized for the enhanced desalination of Gulf of Oman saline water. The adsorbent was characterized by Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy (TEM) and Brunauer–Emmett–Teller–Barrett–Joyner– Halenda (BET–BJH) techniques. The specific surface area was found to be 76.95 m2/g for newly fabricated nanocomposite using BET technique. Desalination of seawater was carried out under batch adsorption of Na+ and K+ using GO–CuO nanocomposite. Additionally, effective parameters on desalination process such as contact time, initial concentration, temperature and pH were comprehensively analyzed. The removal efficiency values for Na+ and K+ using 0.1 g of GO–CuO as an adsorbent were obtained as 96.74% and 82.47%, respectively, within 30 min at pH = 7.2. Moreover, the adsorption equilibrium and contact time data were fitted well to the Langmuir isotherm and pseudo-second-order kinetic model, respectively. The analysis from these models suggested monolayer adsorption pattern following a physisorption mechanism for Na+ and K+ ions uptake using GO–CuO nanocomposite.
ISSN:1944-3986
DOI:10.5004/dwt.2018.22367