ENHANCING TEXTILE WASTEWATER DECOLORIZATION USING GEOPOLYMERS DERIVED FROM FLY ASH WITH VARYING HYDROGEN PEROXIDE CONTENT
Abstract
This study investigates the production and application of geopolymers derived from fly ash, a byproduct of thermal power plants, for the treatment of textile wastewater. Two types of geopolymer adsorbents were synthesized using NaOH and sodium silicate as alkaline activators, with varying amounts of hydrogen peroxide (1 g and 3 g) to evaluate their effectiveness in color removal. The experimental parameters included pH (3, 6, and 9), adsorbent amounts (0.5 g, 1.25 g, and 2 g), and contact times (90, 165, and 240 minutes).
Adsorbent 1 exhibited a color removal efficiency ranging from 57.68% to 81.91%, with optimal conditions at pH 3, 2 g adsorbent, and 165 minutes. Adsorbent 2, with a higher hydrogen peroxide content, showed a superior performance, achieving a color removal efficiency of 59.04% to 88.40%, with optimal conditions at pH 3, 1.92 g adsorbent, and 204 minutes. The maximum color removal efficiency for Adsorbent 2 was 89%, indicating the beneficial impact of increased hydrogen peroxide in the geopolymer synthesis process.
The study concludes that geopolymers produced from industrial waste materials can be highly effective in treating textile wastewater, particularly under acidic conditions with higher adsorbent amounts and sufficient contact time. Adsorbent 2 demonstrated better performance, suggesting the potential for optimization of hydrogen peroxide content in geopolymer formulation to enhance adsorptive properties. These findings support the use of geopolymers as a sustainable and efficient solution for wastewater treatment, contributing to environmental sustainability by repurposing industrial waste. Future research should focus on further optimizing geopolymer composition and exploring additional waste materials for adsorbent production.
Keywords
Geopolymers, Fly ash, Adsorption, Color removal, Response surface methodology
References
- [1] Postrel V. The Fabric of Civilization: How Textiles Made the World. New York, NY: Basic Books; 2020; 304.
- [2] Marcucci M, Nosenzo G, Capannelli G, Ciabatti I, Corrieri D, Ciardelli G. Treatment and reuse of textile effluents based on new ultrafiltration and other membrane technologies. Desalination. 2001; 138: 75–82.
- [3] Najafi M, Abednatanzi S, Derakhshandeh PG, Mollarasouli F, Bahrani S, Behbahani ES, Ghaedi M. Metal-organic and covalent organic frameworks for the remediation of aqueous dye solutions: Adsorptive, catalytic and extractive processes. Coordination Chemistry Reviews. 2022; 454: 214332.
- [4] Fortunato L, Elcik H, Blankert B, Ghaffour N, Vrouwenvelder J. Textile dye wastewater treatment by direct contact membrane distillation: Membrane performance and detailed fouling analysis. Journal of Membrane Science. 2021; 636: 119552.
- [5] Vanhulle S, Trovaslet M, Enaud E, Lucas M, Taghavi S, Van der Lelie D. Decolorization, cytotoxicity, and genotoxicity reduction during a combined ozonation/fungal treatment of dye-contaminated wastewater. Environmental Science & Technology. 2008; 42: 584–589.
- [6] Al-Tohamy R, Ali SS, Li F, Okasha KM, Mahmoud YAG, Elsamahy T, Jiao H, Fu Y, Sun J. A critical review on the treatment of dye-containing wastewater: Ecotoxicological and health concerns of textile dyes and possible remediation approaches for environmental safety. Ecotoxicology and Environmental Safety. 2022; 231: 113160.
- [7] Rathi BS, Kumar PS. Sustainable approach on the biodegradation of azo dyes: A short review. Current Opinion in Green and Sustainable Chemistry. 2022; 33: 100578.
- [8] Patra T, Mohanty A, Singh L, Muduli S, Parhi PK, Sahoo TR. Effect of calcination temperature on morphology and phase transformation of MnO2 nanoparticles: A step towards green synthesis for reactive dye adsorption. Chemosphere. 2022; 288: 132472.
- [9] Hussain Z, Chang N, Sun J, Xiang S, Ayaz T, Zhang H, Wang H. Modification of coal fly ash and its use as low-cost adsorbent for the removal of directive, acid and reactive dyes. Journal of Hazardous Materials. 2022; 422: 126778.
- [10] Senguttuvan S, Janaki V, Senthilkumar P, Kamala-Kannan S. Polypyrrole/zeolite composite–A nanoadsorbent for reactive dyes removal from synthetic solution. Chemosphere. 2022; 287: 132164.