Removal of Trace Metals
Trace metals are components of the earth’s crust. Due to these natural deposits (in the water, plants and soil) plants, animals and people have adapted in the course of evolution. However, the contamination is continuously increasing through metal production and processing as well as fertilizer production, whereby the greatest rise to date took place during the industrialization in the 20th century.
The research approach in the second project of the StressFix range for the removal of trace metals is based on the fixation of undesirable compounds through a pH-induced sol-gel process. It was able to maintain the effects of different reaction parameters like pH value, trace metal concentration and the amount of precursor substances on the removal of the trace metals, which were combined with the results from the sub-project of microplastic removal. Copper(II) and chrome(III) ions were used, since they can often be found in high concentrations in industrial production processes. The analysis of the reaction solutions took place, among other things, by means of photometric determination.