The Kinetics of Manganese Sorption on Ukrainian Tuff and Basalt—Order and Diffusion Models Analysis

Abstract

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 pHPZC 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.

Comparison the Adsorption Capacity of Ukrainian Tuff and Basalt with Zeolite–Manganese Removal from Water Solution

“…It should be noted that in the presented study, the temperature was much lower than in other studies, since the groundwater temperature was simulated. Our previous study indicated that the Mn adsorption rate and removal efficiency do not change at temperature 10-25°C [Reczek et al 2020]. However, differences in experimental conditions and material preparation may be the reason for obtaining lower adsorption capacity of the Sokirnitskoe zeolite (clinoptilolite) than in paper of Korablew et al [2017].…”

“…However, it can be generalized that at slightly acidic pH, close to neutral, the removal of manganese on volcanic tuff and basalt gives good results. Although the pH of the solution was below pH PZC of the materials (volcanic tuff pH PZC =8.9 and basalt pH PZC =8.5) Mn removal is not inhibited by electrostatic repulsion[Reczek et al 2020].Basalt has the highest affinity for Mn represented by the lowest value of the Langmuir's b parameter. Importantly, increasing the concentration of tuff and zeolite from 1g/1L to 2g/1L decreased its affinity for Mn, represented by higher b values.…”

Experimental study on phosphate rock modified soil-bentonite as a cut-off wall material

“…Table 3 shows the intercept C ≠ 0, it indicates curves fitted by the intraparticle diffusion model does not pass through the origin and there is a boundary layer control effect in the adsorption process. Intraparticle diffusion is not the only control step of the adsorption rate in the adsorption reaction, liquid film diffusion is also involved in controlling the adsorption process simultaneously (Reczek et al 2020). The correlation coefficient of the liquid film diffusion model was greater than that of the intraparticle diffusion model, indicating that the control of adsorption rate by liquid film diffusion was greater than that by intraparticle diffusion.…”

Incorporating Kinetic Modeling in the Development Stages of Hard Rock Mine Projects

“…Plante et al [17] demonstrated that plagioclase controlled Ni mobility through sorption in waste rock piles of the Tio mine. More recently, Reczek et al [104] and Trach et al [105] stated that volcanic tuff and basalt effectively adsorb Mn. Therefore, the next step of the geochemical assessment of Akasaba West materials should involve sorption experiments to investigate the effect of the sorption capacity of plagioclase on water quality.…”