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

Babatunde, Akintunde, Zhao, Y. Q., Burke, A. M., Morris, M. A. and Hanrahan, J. P. 2009. Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands. Environmental Pollution 157 (10) , pp. 2830-2836. 10.1016/j.envpol.2009.04.016

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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 potential phosphate-removing substrate in engineered wetlands. Results indicate specific surface area ranged from 28.0 m2 g−1 to 41.4 m2 g−1. X-ray Diffraction, Fourier transform infrared and energy-dispersive X-ray spectroscopes all indicate Al-WTR is mainly composed of amorphous aluminium which influences its phosphorus (P) adsorption capacity. The pH and electrical conductivity ranged from 5.9 to 6.0 and 0.104 dS m−1 to 0.140 dS m−1 respectively, showing that it should support plant growth. Batch tests showed adsorption maxima of 31.9 mg P g−1 and significant P removal was achieved in column tests. Overall, results showed that Al-WTR can be used for P removal in engineered wetlands and it carries the benefits of reuse of a by-product that promotes sustainability.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
Uncontrolled Keywords: Adsorption capacity; Engineered wetlands; Water treatment residual; Phosphorus removal; Wastewater treatment
Publisher: Elsevier
ISSN: 0269-7491
Last Modified: 04 Jun 2017 04:10
URI: http://orca-mwe.cf.ac.uk/id/eprint/34015

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