Kinetic Evaluation of Ozonation and Advanced Oxidation Processes in Colorant-Heavy Textile Wastewater

• Author(s): Matluck Afolabi ; Ogechi Amanda Onukogu ; Thompson Odion Igunma ; Adeniyi K. Adeleke ; Zamathula Q. Sikhakhane Nwokediegwu
• Paper ID: 1708810
• Page: 235-260
• Published Date: 31-08-2021
• Published In: Iconic Research And Engineering Journals
• Publisher: IRE Journals
• e-ISSN: 2456-8880
• Volume/Issue: Volume 5 Issue 2 August-2021

Abstract

The treatment of colorant-heavy textile wastewater remains a critical environmental challenge due to the complex molecular structures and recalcitrant nature of synthetic dyes. This study presents a kinetic evaluation of ozonation and advanced oxidation processes (AOPs), specifically ozone/hydrogen peroxide (O?/H?O?) and Fenton-based systems, for the degradation of persistent dyes in textile effluents. The research investigates the reaction mechanisms, degradation efficiencies, and rate constants under varying operational conditions, including pH, oxidant dosage, and initial dye concentration. Experimental results indicate that while single ozonation exhibits rapid initial decolorization, it is less effective in mineralizing dye molecules, as evidenced by lower chemical oxygen demand (COD) removal. Conversely, the integration of ozone with hydrogen peroxide significantly enhances hydroxyl radical generation, leading to higher reaction rates and broader contaminant breakdown. Kinetic data were fitted to pseudo-first-order and second-order models to determine the most accurate description of each system’s behavior. The pseudo-first-order model provided a better fit for ozonation alone, whereas the combined AOPs showed improved correlation with second-order kinetics, suggesting increased complexity in reactive species interactions. The Fenton process demonstrated high efficiency at acidic pH levels, but its performance was highly sensitive to Fe²?/H?O? ratios and sludge formation. Overall, the O?/H?O? system achieved the highest overall kinetic rate and mineralization efficiency with minimal sludge production, making it a promising alternative for scalable industrial deployment. The study underscores the importance of kinetic evaluation in optimizing AOPs for real-world textile wastewater applications. It further emphasizes that understanding degradation dynamics at the molecular level is essential for achieving sustainable and cost-effective effluent treatment solutions. Future research should focus on pilot-scale validation, integration with membrane or biological systems, and the development of intelligent control frameworks for operational efficiency.

Keywords

Textile Wastewater, Ozonation, Advanced Oxidation Processes, AOP Kinetics, Dye Degradation, Hydroxyl Radicals, Pseudo-First-Order, Fenton Process, O?/H?O? System, COD Removal.

Citations

IRE Journals:
Matluck Afolabi , Ogechi Amanda Onukogu , Thompson Odion Igunma , Adeniyi K. Adeleke , Zamathula Q. Sikhakhane Nwokediegwu "Kinetic Evaluation of Ozonation and Advanced Oxidation Processes in Colorant-Heavy Textile Wastewater" Iconic Research And Engineering Journals Volume 5 Issue 2 2021 Page 235-260

IEEE:
Matluck Afolabi , Ogechi Amanda Onukogu , Thompson Odion Igunma , Adeniyi K. Adeleke , Zamathula Q. Sikhakhane Nwokediegwu "Kinetic Evaluation of Ozonation and Advanced Oxidation Processes in Colorant-Heavy Textile Wastewater" Iconic Research And Engineering Journals, 5(2)