Coal Fly Ash Decorated with Graphene Oxide-Tungsten Oxide Nanocomposite for Rapid Removal of Pb2+ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen.
Emmanuel Christopher UmejuruEswaran PrabakaranKriveshini PillayPublished in: ACS omega (2021)
Coal fly ash was decorated with a graphene oxide-tungsten oxide nanorods nanocomposite (CFA/GO/WO3NRs nanocomposite) via a hydrothermal method and applied for the remediation of lead (Pb2+ ions). The Pb2+ ion-loaded spent adsorbent (CFA/GO/WO3NRs + Pb2+ nanocomposite) was reused for the photodegradation of acetaminophen. CFA/GO/WO3NRs + Pb2+ nanocomposite displayed rapid removal of Pb2+ ions. Pseudo-second-order kinetics and the Langmuir isotherm model described the adsorption data. The adsorption capacity of the CFA/GO/WO3NRs nanocomposite was 41.51 mg/g for the removal of Pb2+ ions. Additionally, the Pb2+ ion-loaded spent adsorbent significantly influenced the degradation of acetaminophen by photocatalysis where 93% degradation was observed. It is worthy to note the reuse application of Pb2+ ion-loaded spent adsorbent as a photocatalyst, which will significantly reduce the secondary waste obtained from conventional adsorption methods.
Keyphrases
- aqueous solution
- visible light
- reduced graphene oxide
- heavy metals
- drug delivery
- quantum dots
- sewage sludge
- municipal solid waste
- cancer therapy
- liver injury
- highly efficient
- gold nanoparticles
- machine learning
- particulate matter
- risk assessment
- drug induced
- high resolution
- mass spectrometry
- drosophila melanogaster
- tandem mass spectrometry
- water soluble