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.
Faculty of Civil Engineering, University of Science and Technology Houari Boumediene, LEGHYD Laboratory, PB 32 El-Alia, Bab - Ezzouar, 16311, Algiers, Algeria.
Environ Res. 2024 Jul 1;252(Pt 3):118976. doi: 10.1016/j.envres.2024.118976. Epub 2024 May 4.
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 (at an initial phosphate concentration of 100 mg L), 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.
本研究评估了饮用水处理厂的铝污泥，以实现从水溶液中高效且经济地去除磷酸盐。广泛的特性描述和批量实验表明，在污泥剂量为 20 g/L（初始磷酸盐浓度为 100 mg/L）、pH 值为 5、温度为 23°C 和搅拌速度为 200 rpm 的条件下，可实现最佳的磷酸盐去除效果。这些条件显著降低了磷酸盐水平，确保了符合法律排放标准。Langmuir 等温线、拟二级动力学和内扩散模型很好地描述了吸附过程，突出了该现象的自发性和吸热性。当应用于奶制品废水时，污泥可有效地将磷酸盐浓度降低到可接受的水平。本研究强调了铝污泥作为环境清理工作中磷酸盐管理的可行解决方案的潜力。
