Adsorption of Azorubine E122 dye via Na-mordenite with tryptophan composite: batch adsorption, Box-Behnken design optimisation and antibacterial activity

• Published in: Environmental technology Vol. 45; no. 17; pp. 3496 - 3515
• Main Authors: Alsharief, Hatun H., Alatawi, Nada M., Al-bonayan, Ameena M., Alrefaee, Salhah H., Saad, Fawaz A., El-Desouky, M.G., El-Bindary, A.A.
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 28-07-2024; Taylor & Francis Ltd
• Subjects: Adsorption; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; Antibacterial activity; Azo Compounds - chemistry; Azorubine E122 dye; Batch adsorption; Box-Behnken design; Chemisorption; Coloring Agents - chemistry; Contaminants; Design optimization; Dyes; E coli; Endothermic reactions; Escherichia coli - drug effects; Food dyes; Hydrogen bonding; Low concentrations; Microorganisms; Nanocomposites; Nanocomposites - chemistry; Staphylococcus aureus - drug effects; Temperature effects; Tryptophan; Tryptophan - chemistry; Water Pollutants, Chemical - chemistry; Water purification; Water Purification - methods; Water sampling; X ray photoelectron spectroscopy; Antibacterial activity; Batch adsorption; Azorubine E122 dye; Box–Behnken design
• ISSN: 0959-3330; 1479-487X; 1479-487X
• DOI: 10.1080/09593330.2023.2219399

In the current investigation, we have reported on the preparation of Na-Mordenite (MOR) modified by tryptophan (MOR-NH
2
) nanocomposite was synthesized and characterized using FT-IR, XRD, SEM, XPS, and BET that represented that the MOR-NH
2
has high surface area 288 m
2
/g and pore volume 0.38 cm
3
/g. This composite represented high efficiency in removal of food dye Azorubine (E122) was 1043 mg/g. Study all the factors that affected on the adsorption such as pH, dose, salinity, E122 dye concentration as well as study the adsorption isotherm models that represented that was fitted to Langmuir. Moreover, study the effect of time according to it the adsorption process was fitted to Pseudo-second-order, and the effect of temperature that approved that the reaction was endothermic, spontaneous, and chemisorption process. The MOR-NH
2
nanocomposite was tested and proven to effectively inhibit the growth of Escherichia coli ATCC® 25922™ and Staphylococcus aureus ATCC® 25923™ at low concentrations. To the best of our knowledge, this work is the first to report the usage of MOR-NH2 adsorbents for the removal of E122 dye in wastewater samples. The mechanism of interaction between MOR-NH
2
and E122 dye was determining as it could be through Hydrogen bonding, pore filling, or through π-π interaction. This research offers a promising solution for purifying water sources that are contaminated with a variety of chemicals, microorganisms, and other contaminants.