Phosphate adsorption on dried alum sludge: Modeling and application to treatment of dairy effluents.

Autor: Djekoune L; Faculty of Mechanical and Process Engineering, University of Science and Technology Houari Boumediene, Laboratory of Sciences and Industrial Process Ingeneering, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria., Maaliou A; Faculty of Civil Engineering, University of Science and Technology Houari Boumediene, LEGHYD Laboratory, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria., Salem Z; Faculty of Mechanical and Process Engineering, University of Science and Technology Houari Boumediene, Laboratory of Sciences and Industrial Process Ingeneering, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria., Ziani D; Faculty of Civil Engineering, University of Science and Technology Houari Boumediene, LEGHYD Laboratory, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria., Kamel R; Faculty of Mechanical and Process Engineering, University of Science and Technology Houari Boumediene, Laboratory of Sciences and Industrial Process Ingeneering, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria., Ouakouak A; Hydraulic and Civil Engineering Department, University of El Oued, POBox 789, El Oued, 39000, Algeria., Baigenzhenov O; Department of Metallurgical Engineering, Satbayev University, Almaty, Kazakhstan., Bokov DO; Institute of Pharmacy Named After A.P. Nelyubin, Sechenov First Moscow State Medical University, 8 Trubetskaya St., bldg. 2, Moscow, 119991, Russian Federation; Laboratory of Food Chemistry, Federal Research Center of Nutrition, Biotechnology and Food Safety, 2/14 Ustyinsky pr., Moscow, 109240, Russian Federation., Ivanets A; Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus, 9/1, Surganova st., 220072, Minsk, Belarus., Hosseini-Bandegharaei A; Faculty of Chemistry, Semnan University, Semnan, Iran; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105, Tamil Nadu, India; Centre of Research Impact and Outcome, Chitkara University, Rajpura, 140401, Punjab, India. Electronic address: ahoseinib@semnan.ac.ir.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Jul 01; Vol. 252 (Pt 3), pp. 118976. Date of Electronic Publication: 2024 May 04.
DOI: 10.1016/j.envres.2024.118976
Abstrakt: This study evaluates Alum sludge from drinking water treatment plants for the efficient and cost-effective removal of phosphates from aqueous solutions. Extensive characterization and batch experiments have established that optimal phosphate removal was achieved with a sludge dosage of 20 g L -1 (at an initial phosphate concentration of 100 mg L -1 ), a pH of 5, a temperature of 23 °C, and a stirring speed of 200 rpm. These conditions significantly reduced phosphate levels, ensuring compliance with legal discharge limits. The Langmuir isotherm, pseudo-second-order kinetic and intraparticle diffusion models best described the adsorption process, highlighting the spontaneous and endothermic nature of the phenomenon. The sludge effectively reduced phosphate concentrations to acceptable levels when applied to dairy effluents. This study underscores the potential of Alum sludge as a viable solution for phosphate management in environmental cleanup efforts.
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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