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BSc-MSc Thesis and Internship Projects, Wageningen University

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Towards an improved assessment of the reactive surface area of soils
The reactive surface area (RSA) of the natural Fe and Al (hydr)oxide fraction of soils plays a crucial role in predicting the availability and mobility of oxyanions in the environment. Furthermore, quantifying the reactive surface ...
Supervisor: Gerwin Koopmans, Walter Schenkeveld, and Tjisse Hiemstra
Department: Soil Chemistry and Chemical Soil Quality
 
Puzzling organic matter fractions: Characterization of Hy and HON fractions.
Organic matter plays a key role in multiple organo-geochemical processes both in the natural environment and organic waste systems (e.g. compost heaps or landfills). A key role of organic matter is that of a reactive surface to wh ...
Supervisor: Nick Quist
Department: Soil Chemistry and Chemical Soil Quality
 
Can enhanced silicate weathering both improve plant drought resistance and sequester CO2? – A pot experiment
To reduce global temperature rise well below 2°C as agreed in the Paris Agreement, the widespread application of Carbon Dioxide (CO2) Removal (CDR) technologies is required in combination with emission reductions. Enhanced Silica ...
Supervisor: Emily te Pas, dr. Mathilde Hagens
Department: Soil Chemistry and Chemical Soil Quality
 
Technological-critical Rare Earth Elements: Binding to iron-oxide nanoparticles
Introduction Rare earth elements (REE) are increasingly applied in modern society. Industries use REE in many high-technology devices, such as smart phones, digital cameras, fluorescent and light-emitting-diode (LED) lights, flat ...
Supervisor: Bert-Jan Groenenberg
Department: Soil Chemistry and Chemical Soil Quality
 
Delayed functionality of siderophores as iron carrier? Displacement of competing metals by iron from metal-siderophore complexes
Iron (Fe) is an essential micronutrient for plants and most microorganisms. Because the bioavailability of Fe in the external environment is often limited due the poor solubility of Fe(hydr)oxide minerals, organisms have developed ...
Supervisor: Walter Schenkeveld
Department: Soil Chemistry and Chemical Soil Quality
 
Micronutrient acquisition in extreme environments: the sodic soils of the Neusiedler See (AT)
Sodic soils are extreme environments with very high pH values (> 9) and salt concentrations, creating a niche for organisms that can survive under such conditions. The availability of cationic micronutrients like Fe, Cu, Zn and Mn ...
Supervisor: Walter Schenkeveld
Department: Soil Chemistry and Chemical Soil Quality
 
Contaminant concentrations in landfill pore water: changes during stimulated degradation
Landfills pose a large threat to the human health & environment (HHE), both through gaseous emissions and through the release of contaminant-rich leachate to the underlying soil. Traditionally landfills are sealed to restrict thes ...
Supervisor: Frank van Raffe; Nick Quist
Department: Soil Chemistry and Chemical Soil Quality
 
Unravelling the composition of the hydrophilic acids SOM fraction
Natural organic matter is a key constituent of soils that plays a prominent role in generating the soil structure, the water holding capacity, the capacity to bind ions, etc. Soil organic matter (SOM) is very heterogeneous in natu ...
Supervisor: Walter Schenkeveld and Rob Comans
Department: Soil Chemistry and Chemical Soil Quality
 
Quantifying the specific surface area of tropical soils
A successful application of surface complexation models (SCMs) to describe and predict the adsorption of ions to the soils natural oxide fraction requires an accurate determination of the reactive surface area (A= m2/g soil) of  ...
Supervisor: Supervisor(s) Elise Van Eynde, Juan Carlos Mendez Fernandez
Department: Soil Chemistry and Chemical Soil Quality
 
Cadmium binding to manganese oxides: an overlooked process in quantifying its bioavailability
Cadmium (Cd) is a heavy metal that is toxic for humans and that regularly exceeds limits in agricultural products around the world, such as rice, potatoes and cacao. Understanding Cd behaviour in soils and uptake by crops is thus  ...
Supervisor: Wietse Wiersma, Liping Weng, Bert-Jan Groenenberg
Department: Soil Chemistry and Chemical Soil Quality
 
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