Application of coal fly ash for trace metal adsorption from wastewater: A review.
Munyengabe, Alexis ; Banda, Maria ; Augustyn, Wilma ; Netshiongolwe, Khathutshelo ; Ramutshatsha-Makhwedzha, Denga
Munyengabe, Alexis
Banda, Maria
Augustyn, Wilma
Netshiongolwe, Khathutshelo
Ramutshatsha-Makhwedzha, Denga
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Abstract
Environmental pollution has become a global issue due to continuing anthropogenic activities
that result in the production of enormous amounts of waste and the subsequent release of hazardous
trace metals. The increasing levels of trace metals in the environment must be monitored
regularly and reduced to prevent contamination of food chain. Numerous conventional technologies
that are widely used for the removal of trace metals from environmental matrices have
many drawbacks. Currently, the preferred method to remove trace metal ions is the adsorption
process, which normally uses adsorbents. This review investigated the applications of coal fly ash
(CFA) as a cost-effective adsorbent and the role it plays in the improved properties of nanomaterials
that are used for treatment of trace metals in water. The use of CFA and its role in
chemical modification processes results to high removal efficiency of trace metals. CFA is a byproduct
of coal combustion which is available in abundance and therefore its use is not only
beneficial in water treatment processes, but also reduce the burden of solid waste disposal
Description
Date
2024-05-16
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Publisher
Elsevier Ltd.
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Keywords
Environmental matrices, Adsorbents, Coal fly ash, Nanomaterials