Rodrigues Joana Patrício, Santos-Echeandía Juan, Chaves-Pozo Elena, Campillo Juan Antonio, Rocha-Santos Teresa, Duarte Armando C, Rivera-Hernández José R, Valdés Juliana, Albentosa Marina
Department of Chemistry & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
Centro Oceanográfico de Vigo (COV-IEO, CSIC), Subida a Radio Faro 50, 36390 Vigo, Spain.
Mar Pollut Bull. 2023 Sep;194(Pt B):115284. doi: 10.1016/j.marpolbul.2023.115284. Epub 2023 Jul 19.
This study investigates the potential of MPs as carriers of pollutants as they can strengthen bioaccumulation of toxic metals on marine organisms. For the first time, the interaction of the metal palladium (Pd) with the widespread MPs, both with increasing concentrations in water environments from anthropogenic sources, was tested. Mytilus galloprovincialis, an important seafood product, was exposed to Pd (24 h) in two ways: water-dissolved and MPs-adsorbed, with depuration followed for 144 h. Quantification of Pd in tissues shown an accumulation 2-3 times higher (59 % of initial Pd) for mussels exposed to MPs-adsorbed Pd and higher in digestive gland than when exposed to water-dissolved Pd (25 %; higher in gills). Additionally, it was demonstrated that Pd induced oxidative stress and altered the feeding behavior of mussels. Therefore, this work support MPs as being vectors of metals (i.e. Pd) to enhance their bioaccumulation on marine organisms which highlights ecological risk of these emerging pollutants.
本研究调查了微塑料作为污染物载体的可能性，因为它们会增强有毒金属在海洋生物体内的生物累积。首次测试了金属钯（Pd）与广泛存在的微塑料之间的相互作用，且这两种物质在来自人为源的水环境中的浓度均不断增加。重要海产品——地中海贻贝以两种方式暴露于钯（24小时）：溶解于水中的钯和吸附在微塑料上的钯，随后进行144小时的净化处理。组织中钯的定量分析表明，暴露于吸附在微塑料上的钯的贻贝体内的钯积累量高出2至3倍（占初始钯的59%），且消化腺中的积累量高于暴露于溶解于水中的钯的贻贝（25%；鳃中的积累量更高）。此外，研究表明钯会诱导氧化应激并改变贻贝的摄食行为。因此，这项工作支持微塑料作为金属（即钯）的载体，增强其在海洋生物体内的生物累积，这凸显了这些新兴污染物的生态风险。
