Biodynamics of mercury in mussel tissues as a function of exposure pathway: natural vs microplastic routes 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Science of the Total Environment
年/卷/期
2019 / 674 /
页码
412-423
ISSN号
0048-9697
作者单位
Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;Univ Politecn Sinaloa, Unidad Acad Ingn Tecnol Ambiental, Carretera Municipal Libre Mazatlan Higueras Km 3, Mazatlan 82199, Sinaloa, Mexico;Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;Spanish Inst Oceanog IEO, C Varadero 1, Murcia 30740, Spain;
作者
Santos, Pablo;Albentosa, Marina;Rivera-Hernandez, Jose R.;Fernandez, Beatriz;Santos-Echeandia, Juan;Garrido, Soledad;Morante, Maria;
摘要
In the marine environment, metals can be present dissolved or adsorbed to suspended particles. In the last decades a new type of particle has been introduced, microplastics (MPs). The exposure route of pollutants influences their accumulation and distribution into tissues. A pulse-chase experiment was conducted in which mussels were exposed to Hg: adsorbed onto MPs and microalgae (MA) and dissolved (WB). Mussels accumulated the same amount of Hg independently of particle, due to the Hg loading in both particles and their acceptability were similar. The highest Hg accumulation occurred in gill when the Hg exposure was through water and in digestive gland when Hg was adsorbed to particles. More than 70% of the Hg uptake through MPs was quickly eliminated due to: i) part of the cleared MPs might not really be ingested but adhered to body surfaces of mussels, ii) MPs ingested were eliminated through faeces as they are non-nutritive particles which may be rejected in stomach preventing their entry into digestive gland and iii) high affinity of Hg on surface of MPs which meant that Hg was mainly eliminated jointly to MPs. The organic nature of MA facilitates the entry of Hg into digestive gland where MA are intracellularly digested releasing the Hg adsorbed onto their surfaces. In this case, Hg may reach deeper levels by translocation of the Hg incorporated into gland towards foot and remaining tissues, a process that might occur through haemolymph. All of the Hg accumulated in WB during the exposure was internally absorbed into tissues, and later translocated from gill to gland. Although Hg elimination rate in MPs mussels was greater than in the other exposure pathways, an important amount of Hg was maintained through the depuration period, thus we cannot and should not neglect the risk of MPs as vectors for mercury. (C) 2019 Elsevier B.V. All rights reserved.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词/主题词
Mercury;Routes of exposure;Metal depuration;Microplastics;Mussels;
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部