Scientific focus areas: Processes concerning xenobiotics (organic micro-pollutants such as pharmaceuticals, personal care compounds, biocides, flame retardants etc.) in the environment and in technical processes with a strong focus on degradation, transformation and phase partitioning and enantioselective processes. Technically my group has 2 focus areas: I) Removal of organic micropollutants from water and thus designing water treatment of the future. All technologies that have a potential to remove micropollutants are of interest, but special interest are biofilm technologies to degrade and metabolize organic micropollutants with reactors of various formats. Currently we work a lot with moving bed biofilm reactors and porous media biofilm reactors. Additionally improved advanced oxidation, membrane bioreactors, nano-filtration and reactive nanotechnologie is addressed. II) Release, emissions and distribution of organic micropollutants in the environment. The molecular and structural mechanisms that are releasing a compound from its place of use are studied. This holds e.g. for the emissions of biocides from composite building materials, for which size of molecule, lipophilicity and UV-vis spectra of the biocide are relevant as well as lipophilicity, density and porosity of the composite material and exposure of the building part to rain and sun.