Dresden 2014 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Interfaces and Thin Films II

CPP 16.8: Talk

Tuesday, April 1, 2014, 11:30–11:45, ZEU 114

Decontamination of lipophilic hazardous materials on sorptive solid surfaces — Salomé Vargas Ruiz¹, Christoph Schulreich², Regine von Klitzing¹, Martin Jung³, Thomas Hellweg², and •Stefan Wellert¹ — ¹Stranski Laboratory, Technical University Berlin, 10623 Berlin, Germany — ²Physical Chemistry III, University Bielefeld, 33615 Bielefeld, Germany — ³Armed Forces Scientific Inst. f. NBC Protection, 29633 Munster, Germany

Modern decontamination media are desired to reconstitute personnel and equipment rapidly. The ability to extract penetrating hydrophobic surface hazards (e.g. pesticides, chemical warfare agents) out of sorptive surfaces and to instantaneously decompose the solubilized compounds is essential. Microemulsions based on natural surfactants and plant and food grade oils possess a soft and "green" performance in a wide temperature range. Additionally, enzymatic degradation of highly toxic organophosphorus compounds inside microemulsions by the enzyme Diisopropyl fluorophosphatase (DFPase) was monitored. The microemulsion structure in the vicinity of model surfaces was investigated by neutron reflectometry. With respect to the desired functionalities, we discuss extraction properties and wetting behaviour of different microemulsions on model and realistic surfaces. Hence, the investigated systems are promising novel environmentally friendly extraction and reaction media providing interesting properties e.g. for biotechnological applications.