Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite

Jyoti Yadav, Manviri Rani, Uma Shanker, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Worldwide consumption, toxicity, and bioaccumulation of paracetamol (PCM) and atenolol (ATL) has drawn attention of researchers over last decades. A small portion of these drugs is absorbed by human body and rest of them is excreted through urine and feces to the environment (water bodies and soil) which might result in negative impacts. Nanocomposite of chromium oxide coupled with zinc hexacyanocobaltates (Cr2O3@ZnHCC) was synthesized by a green-method using Sapindus mukorossi seed-extract for the removal of targeted drugs. Microscopic and spectroscopic analysis of Cr2O3@ZnHCC showed uniformly incorporated prisms into cubic structure having ~75 nm particle size. Well-characterized Cr2O3@ZnHCC and individuals (Cr2O3 & ZnHCC) were utilized for the degradation of PCM and ATL under direct sunlight and dark conditions. Highest degradation of targeted drugs (91%–94%) resulted at 20 mg L−1 concentration of pollutant, 25 mg of catalyst dose, and pH ~ 7 under daylight exposure (5 h). First-order kinetics followed with a high adsorption capacity, Xm (13.4–14.5 mg g−1) value was obtained to confirm the strong binding with the pollutants. Moreover, Cr2O3@ZnHCC substantially suppressed the half-life of targeted drugs (PCM: 0.6 h; ATL: 2.9 h) and converted them into safer-small metabolites as confirmed by liquid chromatography-mass-spectrometry analysis, and the reduction of carbon content was confirmed by total organic carbon analysis. The charge separation mechanism was assisted by UV reflectance and photoluminescence data. The synthesized green-nano photocatalyst displayed high reproducibility (up to 10th cycle), sensitivity, and stability during the degradation process which makes this a suitable candidate for industrial applications.

Original languageEnglish
Article numbere14009
JournalEnvironmental Progress and Sustainable Energy
Volume42
Issue number2
DOIs
Publication statusPublished - 1 Mar 2023

Keywords

  • atenolol
  • chromium oxide coupled zinc hexacyanocobaltate
  • green synthesis
  • paracetamol
  • photocatalytic degradation
  • reusability

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Chemical Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • General Environmental Science

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