Removal of Azo Dyes from Water Using Natural <i>Luffa cylindrica</i> as a Non-Conventional Adsorbent
Ma. Guadalupe Aranda-Figueroa,
Adriana Rodríguez-Torres,
Alexis Rodríguez,
Gloria Ivette Bolio-López,
David Osvaldo Salinas-Sánchez,
Dulce Ma. Arias-Atayde,
Rosenberg J. Romero,
Maria Guadalupe Valladares-Cisneros
Affiliations
Ma. Guadalupe Aranda-Figueroa
Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Adriana Rodríguez-Torres
Departamento de Ingeniería en Aeronáutica, Universidad Politécnica Metropolitana de Hidalgo, Tolcayuca 1009 Ex Hacienda San Javier, Tolcayuca 43860, Mexico
Alexis Rodríguez
Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Gloria Ivette Bolio-López
Dirección de Ciencias Básicas e Ingeniería, Universidad Popular de la Chontalpa, Carretera Cardenas-Huimanguillo Km 2.0, Cardenas 86500, Mexico
David Osvaldo Salinas-Sánchez
Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Dulce Ma. Arias-Atayde
Centro de Investigación y Educación Ambiental Sierra de Huautla (CEAMISH), Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Rosenberg J. Romero
Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Maria Guadalupe Valladares-Cisneros
Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, Cuernavaca 62209, Mexico
Reducing high concentrations of pollutants such as heavy metals, pesticides, drugs, and dyes from water is an emerging necessity. We evaluated the use of Luffa cylindrica (Lc) as a natural non-conventional adsorbent to remove azo dye mixture (ADM) from water. The capacity of Lc at three different doses (2.5, 5.0, and 10.0 g/L) was evaluated using three concentrations of azo dyes (0.125, 0.250, and 0.500 g/L). The removal percent (R%), maximum adsorption capacity (Qm), isotherm and kinetics adsorption models, and pH influence were evaluated, and Fourier-transform infrared spectroscopy and scanning electron microscopy were performed. The maximum R% was 70.8% for 10.0 g L−1 Lc and 0.125 g L−1 ADM. The Qm of Lc was 161.29 mg g−1. Adsorption by Lc obeys a Langmuir isotherm and occurs through the pseudo-second-order kinetic model. Statistical analysis showed that the adsorbent dose, the azo dye concentration, and contact time significantly influenced R% and the adsorption capacity. These findings indicate that Lc could be used as a natural non-conventional adsorbent to reduce ADM in water, and it has a potential application in the pretreatment of wastewaters.
