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By Rita Okoye
The global textile industry, a source of vibrant fashion and fabrics, has long cast a dark shadow in the form of colorant-heavy wastewater, filled with complex, stubborn dyes that resist conventional treatment.
Recently, Matluck Afolabi led a kinetic evaluation targeting this very challenge, focusing on the potent, radical-powered processes that can break these persistent molecules down.
His latest work provides a rigorous, quantitative analysis of ozonation and Advanced Oxidation Processes (AOPs), offering a clear-eyed assessment of their power and limitations in achieving not just cosmetic color removal, but true detoxification.
The study’s strength, as presented by Afolabi, lies in its kinetic precision. While many studies show that a process works, Afolabi’s team detailed how fast and by what mechanism it works, fitting data to pseudo-first and second-order models. This is crucial for practical implementation. The research confirmed that ozonation alone acts quickly to decolorize water—a visual improvement—but is less effective at mineralizing the dyes into harmless carbon dioxide and water. This nuanced finding is critical for an industry seeking genuine sustainability, not just optics.
Afolabi’s analysis then illuminated the superior power of combined systems, such as ozone mixed with hydrogen peroxide. His kinetic data demonstrated that this combination significantly boosts the generation of hydroxyl radicals, nature’s most powerful oxidants. These radicals launch a non-selective attack on the complex dye molecules, tearing them apart more completely and leading to a much higher reduction in Chemical Oxygen Demand (COD), a key indicator of overall pollution. By quantifying the enhanced reaction rates under varying pH and dosage conditions, the 2025 study provides a practical playbook for engineers to design and operate more effective treatment trains.
This research represents a logical and impactful culmination of the research themes Afolabi has built his career upon. It combines the process kinetics focus of his 2020 paper with the advanced treatment technology focus of his 2021 and 2022 work, all while leveraging the data-driven, analytical mindset that paved the way for his Catalysis 4.0 vision.
By tackling a specific, visually stark, and environmentally damaging waste stream with such methodological rigor, Matluck Afolabi continues to demonstrate how deep scientific inquiry, grounded in chemical engineering principles, can provide the tangible solutions needed to clean up our world.
