Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite
The untreated release of dye-contaminated effluents into water bodies presents serious threats to both environmental and public health. Efficient dye removal methods are critical for preventing pollution and safeguarding ecosystems. This study aims to optimize the photocatalytic degradation of Erioc...
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Elsevier
2025-03-01
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| author | Mohammednur Abdu Solomon Tibebu Saeideh Babaee Abebe Worku Titus A.M. Msagati Jemal Fito Nure |
| author_facet | Mohammednur Abdu Solomon Tibebu Saeideh Babaee Abebe Worku Titus A.M. Msagati Jemal Fito Nure |
| author_sort | Mohammednur Abdu |
| collection | DOAJ |
| description | The untreated release of dye-contaminated effluents into water bodies presents serious threats to both environmental and public health. Efficient dye removal methods are critical for preventing pollution and safeguarding ecosystems. This study aims to optimize the photocatalytic degradation of Eriochrome Black T dye in aqueous solutions using a novel composite of TiO2 and biochar (BC) as a photocatalyst under UV irradiation. The TiO2-BC composite (TBC-1) was synthesized via the sol-gel method and characterized using X-ray diffraction, BET surface area analysis, Fourier-transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The synthesis resulted in an anatase phase crystal structure, a reduced band gap of 2.69 eV, and a significant surface area increase from 38 m²/g to 78 m²/g. The photocatalytic performance was optimized under UV light using Response Surface Methodology (RSM) with a Central Composite Design (CCD). Key variables, including initial pH (3–11), dye concentration (10–50 mg/L), photocatalyst dosage (0.5–2.5 g/L), and irradiation time (30–150 min), were assessed. An optimal decolorization efficiency of 99.14 % and a mineralization efficiency of 93.7 % were achieved at pH 3, 32 mg/L dye concentration, 1.48 g/L catalyst dosage, and 124 min irradiation time. These findings highlight the potential of the TBC-1 composite as an effective and sustainable solution for water and wastewater treatment applications, contributing to improved environmental management practices. |
| format | Article |
| id | doaj-art-1cb403f12ce44e488d223178dfac2caa |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-1cb403f12ce44e488d223178dfac2caa2025-01-23T05:27:40ZengElsevierResults in Engineering2590-12302025-03-0125104036Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar compositeMohammednur Abdu0Solomon Tibebu1Saeideh Babaee2Abebe Worku3Titus A.M. Msagati4Jemal Fito Nure5Department of Environmental Engineering, Sustainable Energy Center of Excellence, Bioprocess and Biotechnology Center of Excellence, Nanotechnology Center of Excellence, College of Engineering, Addis Ababa Science and Technology University, 16417 Addis Ababa, Ethiopia; Corresponding author.Department of Environmental Engineering, Sustainable Energy Center of Excellence, Bioprocess and Biotechnology Center of Excellence, Nanotechnology Center of Excellence, College of Engineering, Addis Ababa Science and Technology University, 16417 Addis Ababa, EthiopiaDepartment of Chemical and Metallurgical Engineering, University of the Witwatersrand, Jorissen St, Johannesburg 2000, South AfricaDepartment of Environmental Engineering, Sustainable Energy Center of Excellence, Bioprocess and Biotechnology Center of Excellence, Nanotechnology Center of Excellence, College of Engineering, Addis Ababa Science and Technology University, 16417 Addis Ababa, EthiopiaInstitute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering, and Technology, University of South Africa, Florida Science Campus, Johannesburg, 1710, South AfricaDepartment of Chemical and Metallurgical Engineering, University of the Witwatersrand, Jorissen St, Johannesburg 2000, South AfricaThe untreated release of dye-contaminated effluents into water bodies presents serious threats to both environmental and public health. Efficient dye removal methods are critical for preventing pollution and safeguarding ecosystems. This study aims to optimize the photocatalytic degradation of Eriochrome Black T dye in aqueous solutions using a novel composite of TiO2 and biochar (BC) as a photocatalyst under UV irradiation. The TiO2-BC composite (TBC-1) was synthesized via the sol-gel method and characterized using X-ray diffraction, BET surface area analysis, Fourier-transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The synthesis resulted in an anatase phase crystal structure, a reduced band gap of 2.69 eV, and a significant surface area increase from 38 m²/g to 78 m²/g. The photocatalytic performance was optimized under UV light using Response Surface Methodology (RSM) with a Central Composite Design (CCD). Key variables, including initial pH (3–11), dye concentration (10–50 mg/L), photocatalyst dosage (0.5–2.5 g/L), and irradiation time (30–150 min), were assessed. An optimal decolorization efficiency of 99.14 % and a mineralization efficiency of 93.7 % were achieved at pH 3, 32 mg/L dye concentration, 1.48 g/L catalyst dosage, and 124 min irradiation time. These findings highlight the potential of the TBC-1 composite as an effective and sustainable solution for water and wastewater treatment applications, contributing to improved environmental management practices.http://www.sciencedirect.com/science/article/pii/S2590123025001240DyesPhotocatalystBiocharPhotodegradationUV-irradiation |
| spellingShingle | Mohammednur Abdu Solomon Tibebu Saeideh Babaee Abebe Worku Titus A.M. Msagati Jemal Fito Nure Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite Results in Engineering Dyes Photocatalyst Biochar Photodegradation UV-irradiation |
| title | Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite |
| title_full | Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite |
| title_fullStr | Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite |
| title_full_unstemmed | Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite |
| title_short | Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite |
| title_sort | optimization of photocatalytic degradation of eriochrome black t from aqueous solution using tio2 biochar composite |
| topic | Dyes Photocatalyst Biochar Photodegradation UV-irradiation |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025001240 |
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