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首页> 外文期刊>Environmental research >Assessing the effects of seawater temperature and pH on the bioaccumulation of emerging chemical contaminants in marine bivalves
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Assessing the effects of seawater temperature and pH on the bioaccumulation of emerging chemical contaminants in marine bivalves

机译：评估海水温度和pH值对海洋双壳类生物中新兴化学污染物的生物累积的影响

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摘要

AbstractEmerging chemical contaminants [e.g. toxic metals speciation, flame retardants (FRs) and perfluorinated compounds (PFCs), among others], that have not been historically recognized as pollutants nor their toxicological hazards, are increasingly more present in the marine environment. Furthermore, the effects of environmental conditions (e.g. temperature and pH) on bioaccumulation and elimination mechanisms of these emerging contaminants in marine biota have been poorly studied until now. In this context, the aim of this study was to assess, for the first time, the effect of warmer seawater temperatures (Δ = + 4°C) and lower pH levels (Δ = − 0.4 pH units), acting alone or combined, on the bioaccumulation and elimination of emerging FRs (dechloranes 602, 603 and 604, and TBBPA), inorganic arsenic (iAs), and PFCs (PFOA and PFOS) in two estuarine bivalve species (Mytilus galloprovincialisandRuditapes philippinarum). Overall, results showed that warming alone or combined with acidification promoted the bioaccumulation of some compounds (i.e. dechloranes 602, 604, TBBPA), but also facilitated the elimination of others (i.e. iAs, TBBPA). Similarly, lower pH also resulted in higher levels of dechloranes, as well as enhanced iAs, PFOA and PFOS elimination. Data also suggests that, when both abiotic stressors are combined, bivalves' capacity to accumulate contaminants may be time-dependent, considering significantly drastic increase observed with Dec 602 and TBBPA, during the last 10 days of exposure, when compared to reference conditions. Such changes in contaminants' bioaccumulation/elimination patterns also suggest a potential increase of human health risks of some compounds, if the climate continues changing as forecasted. Therefore, this first study pointed out the urgent need for further research on the effects of abiotic conditions on emerging contaminants kinetics, to adequately estimate the potential toxicological hazards associated to these compounds and develop recommendations/regulations for their presence in seafood, considering the prevailing environmental conditions expected in tomorrow's ocean.Highlights•Temperature and pH effects on emerging contaminants' bioaccumulation were assessed.•Increased temperature promoted the bioaccumulation of Dec 602, Dec 604 and TBBPA.•Lower pH increased Dec's bioaccumulation, but also iAs and PFCs' elimination.•Human exposure to some compounds may increase with climate change.
机译： 摘要 新兴的化学污染物[例如有毒金属形态，阻燃剂（FRs）和全氟化合物（PFCs）等]在历史上从未被视为污染物或它们的毒理学危害，但在海洋环境中却越来越多。此外，迄今为止，对环境条件（例如温度和pH）对海洋生物群中这些新兴污染物的生物积累和消除机理的影响的研究还很少。在此背景下，本研究的目的是首次评估海水温度升高（Δ= + 4°C）和较低pH值水平（Δ=-0.4 pH单位）的影响，这些影响单独发挥作用，或组合发挥作用，两种河口双壳类物种（ galtilproval galloprovincialis italic>和 philipinarum ）。总体而言，结果表明，单独加热或与酸化结合可促进某些化合物（即十氯烷602、604，TBBPA）的生物蓄积，但也有助于消除其他化合物（即iAs，TBBPA）。同样，较低的pH值也导致较高的十氯烷含量，以及提高的iAs，PFOA和PFOS消除。数据还表明，当将两种非生物胁迫因素组合在一起时，考虑到与参考条件相比，在暴露的最后10天期间，Dec 602和TBBPA观察到的急剧增加，双壳类动物积累污染物的能力可能与时间有关。如果气候继续如预期的那样变化，那么污染物在生物累积/消除模式方面的这种变化也表明某些化合物可能对人类健康造成潜在的威胁。因此，这项第一项研究指出，迫切需要进一步研究非生物条件对新兴污染物动力学的影响，以充分考虑与环境有关的环境，充分估计与这些化合物相关的潜在毒理学危害，并针对其在海鲜中的存在提出建议/规定。 突出显示 • 温度和pH对新出现的影响 • 温度升高促进了Dec 602，Dec 604和TBBPA的生物积累。 • 降低pH值可以提高Dec的生物蓄积性，也可以消除iAs和PFCs。 • 人类可能会暴露于某些化合物随着气候变化而增加。

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  • 来源
    《Environmental research》 |2018年第2期|236-247|共12页
  • 作者

    Ana Luísa Maulvault; Carolina Camacho; Vera Barbosa; Ricardo Alves; Patrícia Anacleto; Fabiola Fogaça; Christiaan Kwadijk; Michiel Kotterman; Sara C. Cunha; José O. Fernandes; Rie R. Rasmussen; Jens J. Sloth; Òscar Aznar-Alemany; Ethel Eljarrat; Damià Barceló; António Marques;

  • 作者单位

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.),Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto,MARE – Marine and Environmental Sciences Centre, Faculty of Sciences, University of Lisbon (FCUL);

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.);

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.);

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.);

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.),Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto,MARE – Marine and Environmental Sciences Centre, Faculty of Sciences, University of Lisbon (FCUL);

    EMBRAPA, Embrapa Meio-Norte;

    Wageningen University & Research;

    Wageningen University & Research;

    LAQV-REQUIMTE, Laboratory of Bromatology and Hydrology, Faculty of Pharmacy, University of Porto;

    LAQV-REQUIMTE, Laboratory of Bromatology and Hydrology, Faculty of Pharmacy, University of Porto;

    National Food Institute, Technical University of Denmark;

    National Food Institute, Technical University of Denmark;

    Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, (IDAEA-CSIC);

    Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, (IDAEA-CSIC);

    Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, (IDAEA-CSIC);

    Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P.);

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  • 关键词

    Emerging chemical contaminants; Flame retardants; Toxic elements; Perfluorinated compounds; Bioaccumulation; Warming; Acidification;

    机译：新兴化学污染物;阻燃剂;有毒元素;全氟化合物;生物蓄积;保温;酸化;

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