Katharina works with stormwater bioretention systems. In a lab experiment with over 200 columns she investigated how 12 different plant species affect the metal and nutrient treatment performance of bioretention systems. Further the impact of bioretention systems on metal speciation was investigated. Currently Katharina is responsible for field studies in Sweden. Katharina wants to evaluate if the results she obtained in the lab studies can be confirmed in the field. Further, she investigates how bioretention systems remove micro plastics. With her studies, Katharina wants to support the sustainable implementation of bioretention systems in Sweden and world-wide.