Thesiss

Arsenic (As) is a poisonous metalloid that is persistent in many soils and aquifers worldwide. This element has a high affinity for iron (Fe) and sulfur (S) minerals, and in anoxic environments As is thought to be mobilised through the oxidation and reduction of these minerals, …

The objective of this thesis is to describe the correlated study of individual presolar grains via Nano-scale Secondary Ion Mass Spectrometry (NanoSIMS), Transmission Electron Microscopy (TEM), and Scanning Transmission X-ray Microscopy (STXM) utilizing X-ray Absorption Near Edg…