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

被引:31
作者
Brinza, Loredana [1 ,2 ]
Hong Phuc Vu [2 ,3 ]
Neamtu, Mariana [1 ]
Benning, Liane G. [2 ,4 ,5 ]
机构
[1] Alexandru Ioan Cuza Univ, Inst Interdisciplinary Res, Sci Res Dept, Iasi 700107, Romania
[2] Univ Leeds, Sch Earth & Environm, Earth Surface Sci Inst, Leeds LS2 9JT, W Yorkshire, England
[3] Univ Melbourne, Fac Sci, Sch Earth Sci, Melbourne, Vic 3010, Australia
[4] GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany
[5] Free Univ Berlin, Dept Earth Sci, D-12249 Berlin, Germany
关键词
RAY-ABSORPTION SPECTROSCOPY; SURFACE COMPLEXATION; 2-LINE FERRIHYDRITE; ISOTOPIC FRACTIONATION; CADMIUM(II) SORPTION; LEAD SORPTION; MOLYBDENUM; IRON; MOLYBDATE; REMOVAL;
D O I
10.1038/s41598-018-37875-y
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 m(2) 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.
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页数:12
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