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Assessment of vanadium sorption by different soils.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Vanadium is a white bright metal that belongs to group 5 in the periodic table of

elements. It can exist in different oxidation states from -2 to +5 although the forms

can be found naturally in the environment are (III), (IV) and (V). As vanadium is toxic

at high concentrations, and as vanadium is a common contaminant from e.g., steel

slags, more detailed knowledge on the environmental behavior of this metal is

required. One important property is its sorption to soils, as this will determine the

bioavailability and the risk of leaching from soils. In surface soils vanadium(V) is

commonly the predominating redox species. Therefore the purpose of this study was

to determine vanadium(V) sorption in 7 different soils in order to investigate the

factors determining vanadium(V) sorption and to estimate the capacity of the soils to

bind vanadium.

From laboratory adsorption experiments, vanadium sorption has been studied as a

function of pH, vanadium(V) concentration, and phosphorus status. The adsorbed

vanadium(V) of investigated soils was compared on the basis of the Freundlich

parameters m and log Kf. The clay content of the soil and the content of oxalate

soluble iron and aluminum were two important factors for the vanadium(V) sorption

behavior. The higher the values of these soil properties, the stronger was vanadium(V)

sorption. Among the soils investigated here the sorption strength was highest for the

Kungängen A3 soil and then decreased in the following order Säby, Kungsängen D3,

Pustnäs, Termunck, Guadalajara and Zwijnaarde. It is notable that the three soils with

the strongest vanadium(V) sorption were clay soils, whereas the other four were sandy

or silty soils.

The pH dependence of vanadium sorption was also determined. The results show that

the percentage sorbed vanadium(V) increases with decreasing pH. This is due

probably to the anion properties of vanadium(V) (i.e. vanadate) in combination with

increased positive surface charge on the soil colloids at lower pH. Moreover there is a

competition between phosphate and vanadium(V) for sorption sites, which will cause

less vanadium(V) sorption in soils. Therefore both the pH value and the phosphorus

status are two additional factors that influence the vanadium sorption properties of


Place, publisher, year, edition, pages
, TRITA-LWR Degree Project, ISSN 1651-064X ; 2012:22
Keyword [en]
Vanadium, soil, Freundlich model, sorption
National Category
Civil Engineering
URN: urn:nbn:se:kth:diva-171798OAI: diva2:844537
Educational program
Degree of Master - Environmental Engineering and Sustainable Infrastructure
Available from: 2015-09-21 Created: 2015-08-06 Last updated: 2015-09-21Bibliographically approved

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