Toxicity of treated bilge water: The need for revised regulatory control
| Autor: | Peter Tiselius, Kerstin Magnusson |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Conservation of Natural Resources Oceans and Seas ved/biology.organism_classification_rank.species Portable water purification Wastewater 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Water Purification Copepoda Surface-Active Agents Oil content Toxicity Tests Animals Bilge Ships 0105 earth and related environmental sciences EC50 Acartia tonsa Sweden ved/biology 010604 marine biology & hydrobiology Environmental engineering Pulp and paper industry Pollution Regulatory control Toxicity Environmental science Water Pollutants Chemical |
| Zdroj: | Marine Pollution Bulletin. 114:860-866 |
| ISSN: | 0025-326X |
| Popis: | Water accumulating in the bottom of ships (bilge water), contains a mixture of oil, detergents and other compounds from on board activities. To evaluate ecological effects of released bilge water the chemical composition and toxicity of treated bilge water from seven passenger ships was analysed. The oil content was below 15mgL-1, the threshold for legal discharge, in all but one ship. Still, significant reductions in feeding and reproduction of Acartia tonsa were found after 48h exposure in dilutions with 2.5-5% of bilge water. Mortality was significant at dilutions of 5-10% in 4 of the 5 bilge water samples. Surfactants were the most significant contributor to the toxicity on copepod vital rates and survival. Toxicity was also tested with Microtox where an EC50 was found at dilutions between 4.3% and 52%. The results show that ecological effects might occur also in diluted suspensions of bilge water. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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