Green hybrid coagulants for water treatment: An innovative approach using alum and bentonite clay combined with eco-friendly plant materials for batch and column adsorption.

Autor: Saqib S; Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan., Muneer A; Department of Physics, Government College Women University, Faisalabad, 38000, Pakistan., Munir R; Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan., Sayed M; National Center of Excellence in Physical Chemistry, University of Peshawar, Pakistan., Waqas M; Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan., Aliyam T; Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan., Younas F; School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China., Farah MA; Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia., Elsadek MF; Department of Biochemistry, College of Science, King Saud University, P.O. 2455, Riyadh, 11451, Saudi Arabia., Noreen S; Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan. Electronic address: saima_bashir03@yahoo.com.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Oct 15; Vol. 259, pp. 119569. Date of Electronic Publication: 2024 Jul 05.
DOI: 10.1016/j.envres.2024.119569
Abstrakt: Textile industries contribute to water pollution through synthetic dye discharge. This study explores the use of natural bio-coagulants to remove acid dyes from wastewater, investigating factors like pH, coagulant dose, dye concentration, contact time, and temperature for optimal results. The optimum pH and coagulants capabilities of (CAAPP, CAAPH, CBAGL, CBAPP and CBAPH) were 3 (49.6 mg/g), 3 (42.5 mg/g), 3 (38.9 mg/g), 4 (35.7 mg/g), 4 (34.1 mg/g), and 4 (29.4 mg/g) respectively, while treating of selected BRF-221 dyes from water solution. The acidic range (3-4) was found to have the best pH for the maximal coagulation, and the optimal dose were found to be 0.05 g/50 mL. The equilibrium was attained within 45-60 min for all coagulants. After 60 min of shaking, the maximum coagulation capacities (21.9, 21.02, 16.5, 27.9, 25.3, and 23.4 mg/g) of several coagulant composites (CAAGL, CAAPP, CAAPH, CBAGL, CBAPP, CBAPH) were determined. The initial BRF-221 dye concentration in the range of 10-200 mg/L was considered as optimum for gaiting maximum elimination of dye using different coagulants. At a dye value of 100 mg/L of BRF-221, maximal coagulation capacities CAAGL (179.19 mg/g), CAAPP (166.06 mg/g), CAAPH (141.60 mg/g), and CBAGL (126.49 mg/g), CBAPP (113.9 mg/g), CBAPH (93.08 mg/g) were attained. The study found 35 °C to be the optimal temperature for maximum acid dye removal using bio-coagulants. Increasing temperature reduced coagulation capacity, indicating an exothermic process. Freundlich and Langmuir isotherms showed suitability for pseudo-first-order and pseudo-second-order kinetics in biosorption. Thermodynamic parameters were assessed for process feasibility. Effective coagulants demonstrated sensitivity to electrolyte variations. In column studies, adjusting parameters achieved maximum coagulation efficiency for removing BRF-221 dyes. The study successfully applied optimal parameters to remove real textile effluents at a practical scale. SEM, FT-IR, BET and XRD characterized coagulants, providing insights into stability and morphology.
Competing Interests: Declaration of competing interest 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.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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