Removal of Azo Dyes from Water Using Natural Luffa cylindrica as a Non-Conventional Adsorbent

MA. GUADALUPE ARANDA FIGUEROA ; ALEXIS JOAVANY RODRIGUEZ SOLIS ; DAVID OSVALDO SALINAS SANCHEZ ; Dulce María Arias Ataide ; ROSENBERG JAVIER ROMERO DOMINGUEZ ; María Guadalupe Valladares Cisneros

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.

Tipo de documento: Artículo

Formato: Adobe PDF

Audiencia: Investigadores

Audiencia: Estudiantes

Idioma: Inglés

Área de conocimiento: BIOLOGÍA Y QUÍMICA

Campo disciplinar: QUÍMICA

Nivel de acceso: Acceso Abierto