Use of the Box–Behnken Experimental Design for the Optimization of Orange II (Acid Orange 7) Adsorption on Aloe vera

Industrial wastewater effluents containing dyes are considered to pollute and be harmful to the environment. Among the various removal techniques, the adsorption process using low-cost adsorbents has been successfully used to remove pollutants. In this work, Aloe vera leaves (AVs) have been used as...

Full description

Saved in:
Bibliographic Details
Published in:Sustainability 2023-11, Vol.15 (22), p.15727
Main Authors: Aguilar, María Isabel, Lloréns, Mercedes, Ortuño, Juan Francisco, Meseguer, Víctor Francisco, Pérez-Marín, Ana Belén, Cases, Alejandro
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Biodegradation
Cosmetics
Design of experiments
Drug dosages
Dyes
Efficiency
Fourier transforms
Influence
Leaves
Medical research
Particle size
Pollutants
Sustainability
Textiles
Toxicity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Industrial wastewater effluents containing dyes are considered to pollute and be harmful to the environment. Among the various removal techniques, the adsorption process using low-cost adsorbents has been successfully used to remove pollutants. In this work, Aloe vera leaves (AVs) have been used as adsorbent for the removal of Orange II (O-II). A three-level three-factor Box–Behnken factorial design, including three replicates of center points, was applied to investigate the main parameters affecting the biosorption of O-II dye in aqueous solutions by AVs. The selected parameters were adsorbent dose, initial dye concentration, and contact time. The Box–Behnken experiment design has given a satisfactory result for the optimization of the adsorption process. The obtained value of R2 (0.9993) shows that the quadratic response model adequately represents the relationship between each response and the chosen variables. The pH influences the adsorption capacity, obtaining at pH 2 the maximum adsorption capacity value. From the kinetic models studied, the one that best describes the adsorption of Orange II on Aloe vera is the Bangham model (ARE = 1.06%). The isotherm model that best represents the experimental data is the Toth model. The maximum adsorption capacity obtained by this model was 15.9 mg·g−1.
ISSN:2071-1050
2071-1050
DOI:10.3390/su152215727