| Autor: |
Scholz P; BAM Bundesanstalt für Materialforschung und-prüfung, 12200 Berlin, Germany., Putna-Nimane I; Latvian Institute of Aquatic Ecology, 1007 Riga, Latvia., Barda I; Latvian Institute of Aquatic Ecology, 1007 Riga, Latvia., Liepina-Leimane I; Latvian Institute of Aquatic Ecology, 1007 Riga, Latvia., Strode E; Latvian Institute of Aquatic Ecology, 1007 Riga, Latvia., Kileso A; Shirshov Institute of Oceanology, Russian Academy of Sciences, 117997 Moscow, Russia.; Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia., Esiukova E; Shirshov Institute of Oceanology, Russian Academy of Sciences, 117997 Moscow, Russia., Chubarenko B; Shirshov Institute of Oceanology, Russian Academy of Sciences, 117997 Moscow, Russia., Purina I; Latvian Institute of Aquatic Ecology, 1007 Riga, Latvia., Simon FG; BAM Bundesanstalt für Materialforschung und-prüfung, 12200 Berlin, Germany. |
| Abstrakt: |
Geosynthetic materials are applied in measures for coastal protection. Weathering or any damage of constructions, as shown by a field study in Kaliningrad Oblast (Russia), could lead to the littering of the beach or the sea (marine littering) and the discharge of possibly harmful additives into the marine environment. The ageing behavior of a widely used geotextile made of polypropylene was studied by artificial accelerated ageing in water-filled autoclaves at temperatures of 30 to 80 °C and pressures of 10 to 50 bar. Tensile strength tests were used to evaluate the progress of ageing, concluding that temperature rather than pressure was the main factor influencing the ageing of geotextiles. Using a modified Arrhenius equation, it was possible to calculate the half-life for the loss of 50% of the strain, which corresponds to approximately 330 years. Dynamic surface leaching and ecotoxicological tests were performed to determine the possible release of contaminants. No harmful effects on the test organisms were observed. |
