海洋塑料颗粒是否成为有机污染物向北极输送的载体?
Are marine plastic particles transport vectors for organic pollutants to the Arctic?
机构信息
Institute of Environmental Systems Research, University of Osnabrück, Barbarastr. 12, 49076 Osnabrück, Germany.
出版信息
Mar Pollut Bull. 2010 Oct;60(10):1810-4. doi: 10.1016/j.marpolbul.2010.05.026. Epub 2010 Jun 25.
Plastic litter accounts for 50-80% of waste items stranded on beaches, floating on the ocean surface and lodged in the seabed. Organic pollutants can be absorbed onto plastic particles from sea water, attached to their surfaces or included in the plastic matrix as additives. Such chemicals may be transported to remote regions by buoyant plastics and ocean currents. We have estimated mass fluxes of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and perfluorooctanoic acid (PFOA) to the Arctic via the main ocean currents and compared them to those in the dissolved state and in air. Substance fluxes with atmospheric or sea water currents account for several tons per year, whereas those mediated by plastics are four to six orders of magnitude smaller. However, the significance of various pollutant transport routes does not depend only on absolute mass fluxes but also on bioaccumulation in marine food chains.
塑料垃圾占滞留在海滩上、漂浮在海洋表面和嵌入海底的垃圾的 50-80%。有机污染物可以从海水中被吸收到塑料颗粒上,附着在它们的表面上或作为添加剂包含在塑料基质中。此类化学物质可能会通过浮力塑料和洋流被运送到偏远地区。我们通过主要洋流估算了多氯联苯 (PCBs)、多溴二苯醚 (PBDEs) 和全氟辛酸 (PFOA) 向北极的质量通量,并将其与溶解状态和空气中的通量进行了比较。随大气或海水流输送的物质通量每年达数吨,而通过塑料输送的通量则小四个到六个数量级。然而,各种污染物传输途径的重要性不仅取决于绝对质量通量,还取决于海洋食物链中的生物积累。