Follow SiliCycle on Facebook Follow SiliCycle on Twitter Follow SiliCycle on LinkedIn Watch our videos on Youtube

In situ Speciation of Dissolved Inorganic Antimony in Surface Waters & Sediment Porewaters

> back to SiliaMetS Case Studies

Antimony is a priority environmental contaminant, yet very little research on the behavior and fate of Sb in the environment has been reported. The primary source is mining and processing of Sb for industrial applications. To properly understand the processes controlling the movement of Sb through the environment, there is a need for tools to accurately measure the speciation of Sb, not just total concentration.

Both toxicity & mobility of Sb are affected by oxidation state, thus the accurate measurement of Sb speciation is essential for investigating the behavior of this contaminant in aquatic systems.

The authors present herein a diffusive gradients in thin films (DGT) technique, which utilizes a binding layer containing SiliaMetS Thiol, for the selective measurement of SbIII in surface waters and sediment porewaters.

The mercapto-silica showed a high affinity for SbIII, with uptake efficiencies > 97 % and elution efficiencies of 86.9 +/- 2.6 %

The Si-Thiol based DGT technique was also applied to measure porewater concentrations of SbIII and AsIII in a contaminated freshwater sediment at high resolution.

Bennet, W. W. et al. Environ. Sci.: Processes Impacts, 2016, 18, 992 – 998


Read more