Synthesis of Azo Dyes Derived from 4-Nitroaniline for Textile Coloration and Their Removal from Effluents Using Chemically Modified Sugarcane Bagasse Adsorbent 


Vol. 25,  No. 10, pp. 3853-3873, Oct.  2024
10.1007/s12221-024-00704-3


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  Abstract

This inspection explores the potential of 4-nitroaniline’s potential as a novel diazo component in synthesizing azo dyes, highlighting the research’s novelty. Two new azo dyes, designated 4-(4-nitrophenylazo) salicylic acid (SS) and 4-(4-nitro phenylazo) catechol (OH), were prepared by diazotization of 4-nitroaniline followed by coupling with salicylic acid and catechol, respectively. Fourier transform infrared spectroscopy and other analytical techniques confrmed the structural integrity of the dyes before and after application to cotton, wool, acrylic, and polyester fabrics. The dyes exhibited the best color strength (K/S) and fastness properties on cotton. The exhaustion and fxation of the dyes onto cotton fbers improved with increasing temperature, reaching optimal efciencies (83.92 and 80.34% for SS and 89 and 84.36% for OH) at 95 °C. Furthermore, the study investigates a sustainable method for removing the dyes from textile wastewater. Sugarcane bagasse, a cost-efectiveness and environmentally friendly sorbent, achieved efectual dye elimination from wastewater after sulfuric acid pre-treatment (superior to formaldehyde). This treatment achieved a remarkable 99.34% removal efciency under opti mal conditions (2.5 g, 50 ppm, pH 9, 200 rpm, 120 min). Adsorption exhibited characteristics of both Langmuir isotherm and pseudo-second order kinetics. Difusion studies revealed intraparticle difusion as the rate-controlling step, with flm difusion likely governing the adsorption. Regression modeling yielded an R2 of 93.89% between process factors and dye removal. The efectiveness was further validated by treating real-world, highly polluted textile wastewater obtained from an Egyptian factory. The sugarcane bagasse treatment efectively removed dyes (almost 98.8%) under optimal conditions, demonstrating its reusability after multiple dye-removal cycles.

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  Cite this article

[IEEE Style]

G. Kadry, G. Kadry, H. A. El-Gawad, "Synthesis of Azo Dyes Derived from 4-Nitroaniline for Textile Coloration and Their Removal from Effluents Using Chemically Modified Sugarcane Bagasse Adsorbent," Fibers and Polymers, vol. 25, no. 10, pp. 3853-3873, 2024. DOI: 10.1007/s12221-024-00704-3.

[ACM Style]

Ghada Kadry, Ghada Kadry, and Heba A. El-Gawad. 2024. Synthesis of Azo Dyes Derived from 4-Nitroaniline for Textile Coloration and Their Removal from Effluents Using Chemically Modified Sugarcane Bagasse Adsorbent. Fibers and Polymers, 25, 10, (2024), 3853-3873. DOI: 10.1007/s12221-024-00704-3.

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pISSN : 1229 - 9197
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