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  5. Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands
 
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Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands

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Author(s)
Babatunde, A.O. 
Zhao, Y.Q. 
Burke, A.M. 
Morris, M.A. 
Hanrahan, J.P. 
Uri
http://hdl.handle.net/10197/3128
Date Issued
October 2009
Date Available
30T13:31:36Z August 2011
Abstract
Aluminium-based water treatment residual (Al-WTR) is the most widely generated residual from water treatment facilities worldwide. It is regarded as a by-product of no reuse potential and landfilled. This study assessed Al-WTR as a potential phosphate-removing substrate in engineered wetlands for wastewater treatment. Results indicate the specific surface area ranged from 28.0 m2 g-1 to 41.4 m2 g-1 and this increased with increasing particle size. X-ray Diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and energy-dispersive X-ray spectroscopy all indicate that the Al-WTR is mainly composed of amorphous aluminium which influences its phosphorus (P) adsorption capacity. The pH and electrical conductivity ranged from 5.9 - 6.0 and 0.104 dS m-1 - 0.140 dS m-1 respectively, and both showed that it should suitably support plant growth. Batch tests showed a maximum P adsorption capacity of 31.9 mg-P g-1 and significant P removal was achieved in column tests. Overall, results showed that Al-WTR can be a low-cost, easily and locally available substrate for enhanced P removal in engineered wetlands and it carries the benefits of reuse of a by-product that promotes sustainability.
Sponsorship
Other funder
Other Sponsorship
Environmental Protection Agency
Type of Material
Journal Article
Publisher
Elsevier
Journal
Environmental Pollution
Volume
157
Issue
10
Start Page
2830
End Page
2836
Copyright (Published Version)
2009 Elsevier Ltd.
Keywords
  • Adsorption capacity

  • Engineered wetlands

  • Water treatment resid...

  • Phosphorus removal

  • Wastewater treatment

Subject – LCSH
Water treatment plant residuals
Phosphorus--Absorption and adsorption
Constructed wetlands
DOI
10.1016/j.envpol.2009.04.016
Web versions
http://dx.doi.org/10.1016/j.envpol.2009.04.016
Language
English
Status of Item
Peer reviewed
ISSN
0269-7491
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-sa/1.0/
Owning collection
Civil Engineering Research Collection
Scopus© citations
192
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Jan 28, 2023
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