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Phosphate removal from synthetic and treated sewage effluent by carbide derive carbon

Version 2 2023-10-11, 09:43
Version 1 2023-10-05, 05:53
journal contribution
revised on 2023-10-11, 09:42 and posted on 2023-10-11, 09:43 authored by Ismail W. Almanassra, Viktor Kochkodan, Mosab Subeh, Gordon Mckay, Muataz Atieh, Tareq Al-Ansari

In the present work, a sequence of adsorption tests were implemented to assess the adsorption of Phosphate (PO43−) from synthetic wastewater and treated sewage effluents using carbide derived carbon (CDC). Characterization outcomes of the CDC show a highly microporous material with a point zero of charge (PZC) of 9.9. The successful detection of PO43- onto CDC was conducted by energy dispersive spectroscopy. The influence of operational factors (pH value, temperature, CDC dosage, agitation speed and PO43− feed concentration) on the adsorption uptake were evaluated in batch mode. The kinetic adsorption data could be represented by the pseudo-second order model and it shows that the PO43− is rapidly and efficiently removed by CDC throughout a wide range of pH, mainly due to the high PZC. Adsorption isotherm data were in compliance with Langmuir, Redlich Peterson and Sips models suggesting a monolayer coverage with some possible heterogeneity of CDC adsorption sites. The determined thermodynamic parameters point out that PO43- adsorption through CDC is endothermic, feasible and spontaneous. Remarkably, the CDC demonstrated an adsorption uptake of PO43− of 16.14 mg/g. The adsorption uptake was not affected by the temperature, however; the rate of PO43− removal was promoted by temperature. It was shown that residual PO43− was completely removed from local treated sewage effluent by using CDC, however raising the ionic strength of the feed and the presence of coexisting anions was found to decrease the adsorption uptake of the sorbent. Furthermore, the adsorbed PO43− was efficiently desorbed by 0.01 mol/L HCl solution.

Other Information

Published in: Journal of Water Process Engineering
License: In Copyright
See article on publisher's website: https://dx.doi.org/10.1016/j.jwpe.2020.101323

Funding

Open Access funding provided by the Qatar National Library

History

Language

  • English

Publisher

Elsevier

Publication Year

  • 2020

License statement

© 2020 Published by Elsevier Ltd.

Institution affiliated with

  • Hamad Bin Khalifa University
  • College of Science and Engineering - HBKU
  • Qatar Environment and Energy Research Institute - HBKU

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