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H2O2‑Free Sunlight-Promoted Photo-Fenton-Type Removal of Hexavalent Chromium Using Reduced Iron Oxide Dust
https://orcid.org/0000-0002-8244-2069
https://orcid.org/0000-0002-2560-835X
Herein, we explored a simple approach to using readily available low-cost industrial waste from steel industries known as red-colored iron oxide dust (IOD). After that, it was used for the sunlight-assisted photo removal of another toxic waste material (hexavalent chromium (Cr(VI)) from the aqueous medium showing the photo-Fenton-type mechanism, importantly without using hydrogen peroxide. The photoactive properties of chemically reduced IOD (r-IOD) have been explored to remove toxic Cr(VI) in the presence of two different sources of light (sunlight and artificial bulb light). Kinetic studies and various control experiments have been performed to check the comparative photocatalytic performance of IOD versus r-IOD nanoparticles. The values of the half-life of Cr(VI) removal strongly support the significant influence of the sun on the faster rate for the removal of ∼250 mg L–1 Cr(VI). To maintain the lower pH needed for Cr(VI) reduction, a small quantity of formic acid was used, which can be removed easily by forming CO2 and H2O. The radical trapping experiments and spectroscopic investigations of residue products obtained after the photoreduction process have been explored to support the mechanistic investigation involved in the sunlight-promoted photoreduction of Cr(VI).
Sunlight-promoted treatment of wastewater from one pollutant (toxic hexavalent chromium) by another pollutant (waste red iron oxide dust).
H2O2‑Free Sunlight-Promoted Photo-Fenton-Type Removal of Hexavalent Chromium Using Reduced Iron Oxide Dust
https://orcid.org/0000-0002-8244-2069
https://orcid.org/0000-0002-2560-835X
Herein, we explored a simple approach to using readily available low-cost industrial waste from steel industries known as red-colored iron oxide dust (IOD). After that, it was used for the sunlight-assisted photo removal of another toxic waste material (hexavalent chromium (Cr(VI)) from the aqueous medium showing the photo-Fenton-type mechanism, importantly without using hydrogen peroxide. The photoactive properties of chemically reduced IOD (r-IOD) have been explored to remove toxic Cr(VI) in the presence of two different sources of light (sunlight and artificial bulb light). Kinetic studies and various control experiments have been performed to check the comparative photocatalytic performance of IOD versus r-IOD nanoparticles. The values of the half-life of Cr(VI) removal strongly support the significant influence of the sun on the faster rate for the removal of ∼250 mg L–1 Cr(VI). To maintain the lower pH needed for Cr(VI) reduction, a small quantity of formic acid was used, which can be removed easily by forming CO2 and H2O. The radical trapping experiments and spectroscopic investigations of residue products obtained after the photoreduction process have been explored to support the mechanistic investigation involved in the sunlight-promoted photoreduction of Cr(VI).
Sunlight-promoted treatment of wastewater from one pollutant (toxic hexavalent chromium) by another pollutant (waste red iron oxide dust).
H2O2‑Free Sunlight-Promoted Photo-Fenton-Type Removal of Hexavalent Chromium Using Reduced Iron Oxide Dust
https://orcid.org/0000-0002-8244-2069
https://orcid.org/0000-0002-2560-835X
Herein, we explored a simple approach to using readily available low-cost industrial waste from steel industries known as red-colored iron oxide dust (IOD). After that, it was used for the sunlight-assisted photo removal of another toxic waste material (hexavalent chromium (Cr(VI)) from the aqueous medium showing the photo-Fenton-type mechanism, importantly without using hydrogen peroxide. The photoactive properties of chemically reduced IOD (r-IOD) have been explored to remove toxic Cr(VI) in the presence of two different sources of light (sunlight and artificial bulb light). Kinetic studies and various control experiments have been performed to check the comparative photocatalytic performance of IOD versus r-IOD nanoparticles. The values of the half-life of Cr(VI) removal strongly support the significant influence of the sun on the faster rate for the removal of ∼250 mg L–1 Cr(VI). To maintain the lower pH needed for Cr(VI) reduction, a small quantity of formic acid was used, which can be removed easily by forming CO2 and H2O. The radical trapping experiments and spectroscopic investigations of residue products obtained after the photoreduction process have been explored to support the mechanistic investigation involved in the sunlight-promoted photoreduction of Cr(VI).
Sunlight-promoted treatment of wastewater from one pollutant (toxic hexavalent chromium) by another pollutant (waste red iron oxide dust).
H2O2‑Free Sunlight-Promoted Photo-Fenton-Type Removal of Hexavalent Chromium Using Reduced Iron Oxide Dust
Kaushik, Jaidev (author) / Twinkle (author) / Anand, Satyesh Raj (author) / Choudhary, Shyam Kumar (author) / Sonkar, Sumit Kumar (author)
ACS ES&T Water ; 3 ; 227-235
2023-01-13
Article (Journal)
Electronic Resource
English
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