Phosphate adsorption on dried alum sludge: Modeling and application to treatment of dairy effluents
Djekoune L. Maaliou A. Salem Z. Ziani D. Kamel R. Ouakouak A. Baigenzhenov O. Bokov D.O. Ivanets A. Hosseini-Bandegharaei A.
1 July 2024Academic Press Inc.
Environmental Research
2024#252
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.
Adsorption , Alum sludge , Dairy effluent , Kinetics , Phosphates
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Faculty of Mechanical and Process Engineering, University of Science and Technology Houari Boumediene, Laboratory of Sciences and Industrial Process Ingeneering, PB 32 El-Alia, Algiers, Bab - Ezzouar, 16311, Algeria
Faculty of Civil Engineering, University of Science and Technology Houari Boumediene, LEGHYD Laboratory, PB 32 El-Alia, Bab - Ezzouar, Algiers, 16311, Algeria
Hydraulic and Civil Engineering Department, University of El Oued, POBox 789, El Oued, 39000, Algeria
Department of Metallurgical Engineering, Satbayev University, Almaty, Kazakhstan
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
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus, 9/1, Surganova st., Minsk, 220072, Belarus
Faculty of Chemistry, Semnan University, Semnan, Iran
Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Tamil Nadu, Chennai, 602105, India
Centre of Research Impact and Outcome, Chitkara University, Punjab, Rajpura, 140401, India
Faculty of Mechanical and Process Engineering
Faculty of Civil Engineering
Hydraulic and Civil Engineering Department
Department of Metallurgical Engineering
Institute of Pharmacy Named After A.P. Nelyubin
Laboratory of Food Chemistry
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Faculty of Chemistry
Department of Sustainable Engineering
Centre of Research Impact and Outcome
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