Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands
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|Title:||Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands||Authors:||Babatunde, A.O.
|Permanent link:||http://hdl.handle.net/10197/3128||Date:||Oct-2009||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.||Funding Details:||Other funder||Type of material:||Journal Article||Publisher:||Elsevier||Copyright (published version):||2009 Elsevier Ltd.||Keywords:||Adsorption capacity; Engineered wetlands; Water treatment residual; Phosphorus removal; Wastewater treatment||Subject LCSH:||Water treatment plant residuals
Phosphorus--Absorption and adsorption
|DOI:||10.1016/j.envpol.2009.04.016||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Centre for Water Resources Research Collection|
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection
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