Coal Fly Ash Decorated with Graphene and Polyaniline Nanocomposites for Effective Adsorption of Hexavalent Chromium and Its Reuse for Photocatalysis.

Coal fly ash was functionalized and modified with graphene oxide and polyaniline (CFA/GO/PANI nanocomposite) through hydrothermal synthesis, which was used for remediation of hexavalent chromium (Cr(VI)) ions. Batch adsorption experiments were carried out to investigate the effects of adsorbent dosage, pH, and contact time on the removal of Cr(VI). The ideal pH for this work was 2, and it was used for all other studies.

Application of zeolite based nanocomposites for wastewater remediation: Evaluating newer and environmentally benign approaches.

The presence of heavy metal ions and emerging pollutants in water poses a great risk to various biological ecosystems as a result of their high toxicity. Consequently, devising efficient and environmentally friendly methods to decontaminate these waters is of high interest to many researchers around the world. Among the varied water treatment and desalination means, adsorption and photocatalysis have been widely employed.

Coal Fly Ash Decorated with Graphene Oxide-Tungsten Oxide Nanocomposite for Rapid Removal of Pb Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen.

Coal fly ash was decorated with a graphene oxide-tungsten oxide nanorods nanocomposite (CFA/GO/WONRs nanocomposite) via a hydrothermal method and applied for the remediation of lead (Pb ions). The Pb ion-loaded spent adsorbent (CFA/GO/WONRs + Pb nanocomposite) was reused for the photodegradation of acetaminophen. CFA/GO/WONRs + Pb nanocomposite displayed rapid removal of Pb ions.