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Solar Light Induced Photocatalysis for Treatment of High COD Pharmaceutical Effluent with Recyclable Ag-Fe Codoped TiO2: Kinetics of COD Removal

Darshana Tushar Bhatti1 * and Sachin Prakashbhai Parikh1

Corresponding author Email: darshana333@yahoo.com

DOI: http://dx.doi.org/10.12944/CWE.15.1.17

A wide range of active pharmaceutical ingredients (API) is found in various water streams. These synthetic non-biodegradable organics create trouble in conventional wastewater treatment due to toxicity. There is a strong need to develop substitute technology such as visible light driven photocatalysis with a reusable photocatalyst to completely oxidize these substances into carbon dioxide and water. Sol-gel method was used for synthesis of Fe doped TiO2 and Ag-Fe codoped TiO2 nanoparticles with 0.5 wt% Fe and Ti/Ag molar ratio 30 (Ag-Fe CT 30). The morphology and structure of nanoparticles were studied using various analytical techniques. Ag-Fe CT 30 photocatalyst has exhibited excellent photocatalytic activity compared to commercial TiO2, undoped TiO2 and Fe doped TiO2 nanophotocatalysts under solar and UV irradiation for removal of an antifungal drug intermediate, Difloro triazole acetophenone (DFTA) from water. COD reduction efficiency was highest with Ag-Fe CT 30 under solar and UV irradiation proves the potential of Ag-Fe CT 30 photocatalyst to absorb both UV as well as visible radiations. Ag-Fe CT 30 has shown good stability for 4 runs without much decline in the efficacy. This study provides insights on the solar application of a reusable Ag-Fe CT 30 photocatalyst for the treatment of high strength COD wastewater. Kinetics of COD reduction by photocatalysis has been determined.
 

Highlights

  • TiO2, Fe doped TiO2 and Ag-Fe codoped TiO2 nanoparticles have been successfully synthesized using the sol-gel method and characterized using various analytical methods.
  • Photocatalytic activity of different photocatalysts for mineralization of DFTA is compared under solar and UV irradiation for COD removal (with initial COD of 75,000 mg/L) has been carried out.
  • Kinetics for Ag-Fe codoped TiO2 photocatalysis has been determined.
  • The photocatalysts can be easily separated from the water after application and show good stability up to 4 runs indicated from six recycled tests.

Ag-Fe Co-doped TiO2, Difloro Triazole Acetophenone, Recyclability, Solar Photocatalysis

Copy the following to cite this article:

Bhatti D. T, Parikh S. P. Solar Light Induced Photocatalysis for Treatment of High COD Pharmaceutical Effluent with Recyclable Ag-Fe Codoped TiO2: Kinetics of COD Removal. Curr World Environ 2020; 15(1).

DOI:http://dx.doi.org/10.12944/CWE.15.1.17

Copy the following to cite this URL:

Bhatti D. T, Parikh S. P. Solar Light Induced Photocatalysis for Treatment of High COD Pharmaceutical Effluent with Recyclable Ag-Fe Codoped TiO2: Kinetics of COD Removal. Curr World Environ 2020; 15(1). Available from: https://bit.ly/2VQN1DK

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