Application of stable isotopes to the bioaccumulation and trophic transfer of arsenic in aquatic organisms around a closed realgar mine.,Science of the Total Environment

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Application of stable isotopes to the bioaccumulation and trophic transfer of arsenic in aquatic organisms around a closed realgar mine.
Science of the Total Environment ( IF 9.8 ) Pub Date : 2020-04-07 , DOI: 10.1016/j.scitotenv.2020.138550
Fen Yang ₁ , Zhenzhen Yu ₂ , Shaowen Xie ₃ , Hanxiao Feng ₂ , Chaoyang Wei ₁ , Hongzhi Zhang ₁ , Jing Zhang ₄

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The bioaccumulation and trophic transfer of As along food webs in freshwater ecosystems remain largely unknown. In this study, multiple environmental and biological samples were collected from a closed realgar mining area in South China. The As concentrations in the surface water, sediments and soils in the mining area were 0.62-3293 μg/L, 9.53-4543 mg/kg and 7.32-5008 mg/kg, respectively, and gradually decreased with distance from the central mining sites, indicating that historic As mining activities had an eminent impact on As contamination around the mine. The As concentrations in aquatic organisms ranged from 0.60 mg/kg to 45.75 mg/kg and varied markedly among sites and species, reflecting the influence of various physiologic and environmental factors. Arsenic species identified by liquid chromatography inductively coupled plasma-mass spectrometry (HPLC-ICP-MS) were mainly organic, comprising 8% to 66% of the total As. Both the proportions and concentrations of inorganic As were positively correlated with total As. This correlation could be attributed to the higher assimilation and accumulation of inorganic As or the lower biotransformation ability of inorganic As with the increasing total As in the studied organisms. Values of δ13C and δ15N in aquatic organisms ranged from -30.59‰ to -15.07‰ and from 4.31‰ to 12.98‰, respectively, indicating multiple trophic levels and variety in the diet sources of these organisms. The δ15N increased distinctly in the order of planktivorous

中文翻译：

稳定同位素在封闭雄黄矿周围水生生物中砷的生物积累和营养转移中的应用。

砷在淡水生态系统中沿着食物网的生物富集和营养转移仍然未知。在这项研究中，从华南一个封闭的雄黄矿区收集了多个环境和生物样品。矿区地表水，沉积物和土壤中的砷浓度分别为0.62-3293μg/ L，9.53-4543 mg / kg和7.32-5008 mg / kg，并且随着距中心矿区的距离逐渐减小，表明历史性的砷矿开采活动对矿井周围的砷污染产生了显着影响。水生生物中砷的浓度范围从0.60 mg / kg到45.75 mg / kg，并且在不同地点和物种之间差异显着，反映了各种生理和环境因素的影响。通过液相色谱-电感耦合等离子体质谱法（HPLC-ICP-MS）鉴定出的砷主要为有机物，占总砷的8％至66％。无机砷的比例和浓度均与总砷成正相关。这种相关性可以归因于所研究生物中无机As的较高同化和积累或无机As的较低的生物转化能力。水生生物中的δ13C和δ15N值分别在-30.59‰至-15.07‰和4.31‰至12.98‰之间，表明这些生物的营养水平和饮食来源多种多样。δ15N以板岩层序显着增加无机砷的比例和浓度均与总砷成正相关。这种相关性可以归因于所研究生物中无机As的较高同化和积累或无机As的较低的生物转化能力。水生生物中的δ13C和δ15N值分别在-30.59‰至-15.07‰和4.31‰至12.98‰之间，表明这些生物的营养水平和饮食来源多种多样。δ15N以板岩层序显着增加无机砷的比例和浓度均与总砷成正相关。这种相关性可以归因于所研究生物中无机As的较高同化和积累或无机As的较低的生物转化能力。水生生物中的δ13C和δ15N值分别在-30.59‰至-15.07‰和4.31‰至12.98‰之间，表明这些生物的营养水平和饮食来源多种多样。δ15N以板岩层序显着增加水生生物中的δ13C和δ15N值分别在-30.59‰至-15.07‰和4.31‰至12.98‰之间，表明这些生物的营养水平和饮食来源多种多样。δ15N以板岩层序显着增加水生生物中的δ13C和δ15N值分别在-30.59‰至-15.07‰和4.31‰至12.98‰之间，表明这些生物的营养水平和营养来源多种多样。δ15N以板岩层序显着增加

更新日期：2020-04-08

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