Removal of Azo Dyes From Water on a Large Scale Using a Low-Cost and Eco-Friendly Adsorbent

Ma. Guadalupe Aranda-Figueroa, Rosenberg J. Romero, Mario Rodríguez, Adriana Rodríguez-Torres, Alexis Rodríguez, Gloria Ivette Bolio-López, Dulce María Arias-Ataide, Álvaro Torres-Islas and Maria Guadalupe Valladares-Cisneros ()
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Ma. Guadalupe Aranda-Figueroa: Faculty of Chemical Sciences and Engineering, Autonomous University of the State of Morelos, University Ave. 1001, Chamilpa, Cuernavaca 62209, Morelos, Mexico
Rosenberg J. Romero: Center for Research in Engineering and Applied Sciences, Autonomous University of the State of Morelos, University Ave. 1001, Chamilpa, Cuernavaca 62209, Morelos, Mexico
Mario Rodríguez: Centro de Investigaciones en Óptica, A. P. 1-948, Lomas del Campestre, León 37000, Guanajuato, Mexico
Adriana Rodríguez-Torres: Department of Aeronautical Engineering, Polytechnic Metropolitan University of Hidalgo, Tolcayuca 1009 Ex Hacienda San Javier, Tolcayuca 43860, Hidalgo, Mexico
Alexis Rodríguez: Center of Research in Biotechnology, Autonomous University of the State of Morelos, University Ave. 1001, Chamilpa, Cuernavaca 622092, Morelos, Mexico
Gloria Ivette Bolio-López: Basic Science and Engineering, Popular University of La Chontalpa, Carretera Cardenas-Huimanguillo km 2.0, Cardenas 86500, Tabasco, Mexico
Dulce María Arias-Ataide: Higher Education School from Jicarero, Autonomous University of the State of Morelos, Carretera Galeana-Tequesquitengo s/n, Jojutla 62915, Morelos, Mexico
Álvaro Torres-Islas: Faculty of Chemical Sciences and Engineering, Autonomous University of the State of Morelos, University Ave. 1001, Chamilpa, Cuernavaca 62209, Morelos, Mexico
Maria Guadalupe Valladares-Cisneros: Faculty of Chemical Sciences and Engineering, Autonomous University of the State of Morelos, University Ave. 1001, Chamilpa, Cuernavaca 62209, Morelos, Mexico

Sustainability, 2025, vol. 17, issue 11, 1-18

Abstract: The use of natural materials as adsorbents and the environmentally friendly removal of pollutants and azo dyes from water are important topics today. The goal of this research work was to assess the utility of Luffa cylindrica ( L. cylindrica ) as a natural and non-conventional adsorbent for azo dyes in water on a large scale (2 L). An azo dye (AD) at a concentration of 0.250 g/L was removed from the solution at a rate of 63.07% using 10.0 g/L doses of L. cylindrica , and the maximum adsorption capacity of L. cylindrica was 25.25 mg/g. L. cylindrica desorbed 95.8% of the AD in 0.1 M NaOH. Thermodynamically, the adsorption occurs through pseudo-second-order kinetics and the behaviors adjust better to the Langmuir isotherm. The analysis of variance ( p -value < 0.05) shows that the contact time and the concentration of AD significantly influence the adsorption capacity and removal of AD. Few studies have examined the environmentally friendly removal of azo dyes from water using a natural non-conventional adsorbent.

Keywords: Luffa cylindrica; environmentally friendly removal of pollutants; adsorption (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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