Eco-Friendly Ozone Process for Denim Garments as an Alternative to Conventional Bleaching

The rapid development in agriculture and industrial sectors has raised some serious global issues like heavy metals pollution of water resources. Cadmium (Cd) is amongst the major water pollutants worldwide. In this study, two novel sorbents were prepared by using post-consumer textile waste (PCTW). The waste denim fabric was recycled with environmentally friendly H2O2 and Ozone through oxidation under alkaline conditions to produce several functional groups at the surface (named as ODF@H202 and ODF@03 respectively) that could trap the heavy metal cations from contaminated water. The functionalized fabric sorbents were characterized by Fourier transform infrared spectroscopy (FT-IR), X-Ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-Ray (EDX) that revealed the presence of carboxylic acid, hydroxyl, and amine functional groups on their surfaces. The sorption isotherm, sorption kinetics and sorption thermodynamics were carried out to unravel the sorption process mechanism. The ODF@H202 sorbent was proved more effective by giving maximum adsorption capacity of (238.09 mg g−1) compared to Ozone treatment (175.44 mg g−1) for Cd2+ and achieved within just 20 min for both sorbents. Pseudo 2nd order and Langmuir models confirmed the chemosorption as dominant mechanism for the monolayer sorption of Cd2+ ions onto ODF@H202 and ODF@03. The sorption thermodynamic revealed the sorption process as endothermic and spontaneous in nature. The results showed that both ODF@H202 and ODF@03 sorbents have an efficient potential for sorbing Cd from contaminated water. Furthermore, both ODF@H202 and ODF@03 sorbents were also tested in a regeneration study to investigate the reuse of these sorbents, and we achieved marvelous results. Both sorbents gave up to 90% of the sorption capacity even after 10 recycles. Conclusively, both sorbents can have their implications for the preparation of filters that can be used for the treatment of wastewater. This study has practical significance by tackling the two environmental problems i.e. heavy metal pollution and denim waste.

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Environmental Impact Assessment of Traditional and Sustainable Garments Washing Approaches for Denim Apparels: A Step toward Cleaner Production and Consumption

Rahaman,

Hasan,

Khan

2024

Preprint

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In today's fashion industry, the sustainability of garment washing processes especially denim washing is unquestionably an important issue. A garment's design and aesthetic appeal have a big impact on how consumers opt to purchase. Denim enthusiasts now have a variety of alternatives, such as eco-denim initiatives, zero water technologies, oxygen and ozone washes, advanced and organic denim, and less harmful fabric dyeing and washing practices. Many of these choices may not be as environmentally friendly as they are advertised to be, though regardless of their marketing commitments. The goal of this research paper is to contrast the three traditional washing methods such as dark, medium, and light washes with their sustainable counterparts. The present research provides a detailed comparison of traditional and sustainable washing methods, highlighting their advantages and drawbacks. While both approaches can produce the about same appearances for the apparels, sustainable washing works out to be more effective, saving at least 25 minutes per wash. Sustainable light washing saves water consumption an additional 3.9 L/Kg garments, while medium and dark washing saves 14.44 L/Kg and 19.4 L/Kg garments. When compared to traditional washes, sustainable washes have reduced consumption of energy and chemical impact scores. Conventional methods of washings (35 for light, 42 for medium, and 49 for dark wash) have more EIM (Environmental Impact Measurement) score in a comparison to sustainable washing (14 for light, 21 for medium, and 23 for dark wash). It also indicates that environmentally friendly and more efficient washing practices are feasible. This provides an excellent illustration of how crucial ethical choices are. An environmental impact score of more than 66, as determined by the EIM software evaluation, is considered to be harmful to the environment whereas 0–33 indicates low effect, and 34–66 indicates medium impact.

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Eco-Friendly Ozone Process for Denim Garments as an Alternative to Conventional Bleaching

Cited by 3 publications

References 14 publications

Environmentally sustainable color fading approaches of denim fabric using alternative garments dry process: An insight into chromatic parameters and physical properties

Environmentally sustainable color fading approaches of denim fabric using alternative garments dry process: An insight into chromatic parameters and physical properties

Valorization of textile waste for removal of Cadmium from contaminated water

Environmental Impact Assessment of Traditional and Sustainable Garments Washing Approaches for Denim Apparels: A Step toward Cleaner Production and Consumption

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