Dye Degradation of Acid Violet 7 by Hybrid Hydrodynamic Cavitation and Activated Charcoal Adsorption

Gayatri Gawande; Harsh Khadtar; Aaveg Kate; Krushna Chavan; Gauri Jamnare; Pranita Surjuse

doi:10.2991/978-94-6463-940-7_21

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Dye Degradation of Acid Violet 7 by Hybrid Hydrodynamic Cavitation and Activated Charcoal Adsorption

Authors

Gayatri Gawande¹^{, *}, Harsh Khadtar², Aaveg Kate³, Krushna Chavan⁴, Gauri Jamnare⁵, Pranita Surjuse⁶

¹Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

²Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

³Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

⁴Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

⁵Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

⁶Dept. Of Chemical Engineering, Vishwakarma Institute of Technology (Savitribai Phule Pune University) Pune University, Pune, India

^*Corresponding author.

Corresponding Author

Gayatri Gawande

Available Online 31 December 2025.

DOI: 10.2991/978-94-6463-940-7_21 How to use a DOI?
Keywords: Acid Violet 7; Azo dye degradation; Hydrodynamic cavitation; activated carbon adsorption; Advanced oxidation processes (AOPs); Wastewater treatment; COD reduction; Hybrid treatment process; pH optimization
Abstract: Synthetic azo dyes, such as Acid Violet 7 (AV7), are highly stable in industrial effluents and therefore pose significant environmental challenges for their removal. This study investigates a hybrid process that combines hydrodynamic cavitation (HC) with activated carbon (AC) adsorption to degrade AV7 under varying pH conditions. A lab-scale orifice cavitation reactor, powered by a 1.43 kW pump, was used, followed by AC polishing to capture any residual dye molecules. The hybrid process has improved the decolorisation upto 99.9% and chemical oxygen demand (COD) removal upto 61.3% at pH 3, The effect of pH has been studied and it has shown a strong pH dependence for both cavitation oxidation and adsorption. These results demonstrate that combining HC with AC significantly enhances dye removal compared to HC alone, offering a scalable, low-chemical, and energy-efficient method for treating dye-contaminated wastewater.
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title: Proceedings of the Conference on Social and Sustainable Innovation in Technology & Engineering (SASI-ITE 2025)
Series: Advances in Intelligent Systems Research
Publication Date: 31 December 2025
ISBN: 978-94-6463-940-7
ISSN: 1951-6851
DOI: 10.2991/978-94-6463-940-7_21 How to use a DOI?
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

ris enw bib

TY  - CONF
AU  - Gayatri Gawande
AU  - Harsh Khadtar
AU  - Aaveg Kate
AU  - Krushna Chavan
AU  - Gauri Jamnare
AU  - Pranita Surjuse
PY  - 2025
DA  - 2025/12/31
TI  - Dye Degradation of Acid Violet 7 by Hybrid Hydrodynamic Cavitation and Activated Charcoal Adsorption
BT  - Proceedings of the Conference on Social and Sustainable Innovation in Technology & Engineering (SASI-ITE 2025)
PB  - Atlantis Press
SP  - 282
EP  - 299
SN  - 1951-6851
UR  - https://doi.org/10.2991/978-94-6463-940-7_21
DO  - 10.2991/978-94-6463-940-7_21
ID  - Gawande2025
ER  -

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