Decontamination of textile effluents via the adsorption process on various raw clay minerals enhanced by ozonation: a modeling approach and optimization.

Autor:	Hendaoui K; Faculty of Sciences of Bizerte, LR 05/ES09 Laboratory of Applications of Chemistry to Resources and Natural Substances and to the Environment (LACReSNE), Carthage University Zarzouna 7021 Tunisia fadhilaayari@yahoo.fr., Ben Ayed S; Faculty of Sciences of Bizerte, LR 05/ES09 Laboratory of Applications of Chemistry to Resources and Natural Substances and to the Environment (LACReSNE), Carthage University Zarzouna 7021 Tunisia fadhilaayari@yahoo.fr., Mansour L; Department of Zoology, College of Science, King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia., Ben Othman A; School of Chemistry Polymers Materials, Molecular Design Laboratory, EPCM-ULP-CNRS 25 Rue Becquerel F-67087 Strasbourg France., Ayari F; Faculty of Sciences of Bizerte, LR 05/ES09 Laboratory of Applications of Chemistry to Resources and Natural Substances and to the Environment (LACReSNE), Carthage University Zarzouna 7021 Tunisia fadhilaayari@yahoo.fr.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2024 Nov 27; Vol. 14 (51), pp. 37803-37819. Date of Electronic Publication: 2024 Nov 27 (Print Publication: 2024).
DOI:	10.1039/d4ra03757j
Abstrakt:	This study seeks to characterize three different clays and compare their capability to decontaminate a textile effluent using the adsorption process and to explore the synergistic effects of ozonation on the treatment. Response surface methodology, based on central composite design, was used to investigate the impact of three key parameters, namely, solution pH, clay dosage, and contact time, on the adsorption process. The three clays were sourced from distinct regions across Tunisia: Rommana, Tabarka, and Medenine. The analysis of the clays revealed that the Rommana green clay (RGC) was predominantly composed of smectite, the Tabarka white clay (TWC) was rich in kaolinite, and the Medenine red clay (MRC) contained a combination of illite and kaolinite. Under optimal conditions for color removal, the attained efficiencies for removing color, chemical oxygen demand (COD), and total suspended solids (TSS) were as follows: 86.89%, 57.2% and 80.7% for RGC; 80.56%, 55.02% and 75.28% for TWC; and 81.7%, 56.8% and 75.5% for MRC, respectively. Results show that RGC exhibited the highest adsorption percent of dye removal (≅87%) at the optimal conditions evaluated via the CCD design of the response surface methodology (pH ≈ 3.98, adsorbent dose 7 g L -1 , contact time = 89 min). The enhancement of the adsorption process through ozonation achieved color removal efficiencies of 98.2%, COD removal efficiencies of 71.4%, and TSS removal efficiencies of 89.3% for RGC; 98.15%, 70.13%, and 88.74% for TWC; and 98.3%, 70.32%, and 88.56% for MRC, respectively, in compliance with the Tunisian standard for river discharge. The treated effluent can be used in the irrigation of saline plants. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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