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Experimental and simulation results of the adsorption of Mo and V onto ferrihydrite

DOI: 10.1038/s41598-018-37875-y DOI Help

Authors: Loredana Brinza (Alexandru Ioan Cuza University of Iasi; University of Leeds) , Hong Phuc Vu (University of Leeds; University of Melbourne) , Mariana Neamtu (Alexandru Ioan Cuza University of Iasi) , Liane G. Benning (University of Leeds, School of Earth & Environment; GFZ German Research Centre for Geosciences)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scientific Reports , VOL 9

State: Published (Approved)
Published: February 2019
Diamond Proposal Number(s): 1946

Open Access Open Access

Abstract: This study aims to highlight discrepancies between experimental and simulation linked to the mechanisms of Mo and V adsorption onto ferrihydrite (FHY) nanoparticles. We have measured adsorption capacities and uptake efficiencies and then fitted and compared these with outputs from various geochemical and adsorption models that were run as a function of pH, surface area (SA) and ferrihydrite particles size distributions. Our results revealed that the experimental data for the Mo system could be fitted very well, but this was not the case for the V system, when a model default value for the SA of FHY of 600 m2 g−1 was used. The discrepancy in the results for the V system can be explained by the lack of specific V species and/or associated constants in databases and variation in software versions, which change the outputted chemical species. Our comparative results also confirm that any experimental variables used as modelling inputs need to be checked carefully prior to any modelling exercises.

Subject Areas: Chemistry, Earth Science, Environment

Instruments: I18-Microfocus Spectroscopy