The study aimed to determine the nature of the kinetics of the manganese sorption process on Ukrainian tuff and basalt at different temperatures characteristic of the natural water environment. The scope of the research included manganese sorption kinetic test on natural mineral sorbents at temperatures of 10, 17.5 and 25 °C in slightly acidic conditions. Sorption (pseudo-first order, pseudo-second order and Elovich models) and diffusion kinetic models (liquid film diffusion and intraparticle diffusion) were used in the analysis of test results. The manganese sorption process on both tuff and basalt proceeded quickly. The dynamic equilibrium state of manganese sorption settled after 35 and 45 min on tuff and basalt respectively. Although the process took place in a slightly acidic environment and below pH_PZC of the sorbents, possible electrostatic repulsion did not inhibit the removal of Mn. The Mn sorption on both materials followed the PSO kinetics model. Based on the diffusion kinetic models, it was determined that Mn sorption process on both materials was influenced by diffusion through the boundary layer and intraparticle diffusion. The differences in removal efficiency and rate of Mn sorption in the temperature range of 10–25 °C were not found.

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乌克兰凝灰岩和玄武岩上锰的吸附动力学—有序和扩散模型分析

该研究旨在确定在天然水环境不同温度下，乌克兰凝灰岩和玄武岩上锰吸附过程动力学的性质。研究范围包括在弱酸性条件下在10、17.5和25°C的温度下对天然矿物吸附剂进行锰吸附动力学测试。吸附（伪一阶，伪二阶和Elovich模型）和扩散动力学模型（液膜扩散和粒子内扩散）用于测试结果分析。在凝灰岩和玄武岩上的锰吸附过程都进行得很快。在凝灰岩和玄武岩上，锰吸附的动态平衡状态分别在35和45分钟后稳定下来。尽管该过程是在弱酸性环境中和低于pH _PZC的环境下进行的在吸附剂中，可能的静电排斥作用不会抑制Mn的去除。两种材料上的Mn吸附均遵循PSO动力学模型。根据扩散动力学模型，确定两种材料上的Mn吸附过程均受通过边界层的扩散和颗粒内扩散的影响。在10–25°C的温度范围内，未发现去除效率和Mn吸附速率的差异。