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首页> 外文期刊>Environmental Science & Technology >Trace Metal Speciation And Bioavailability In Surface Waters Of The Black Sea Coastal Area Evaluated By Hf-plm And Dgt
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Trace Metal Speciation And Bioavailability In Surface Waters Of The Black Sea Coastal Area Evaluated By Hf-plm And Dgt

机译：用Hf-plm和Dgt评估黑海沿岸地区地表水中痕量金属的形态和生物利用度

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摘要

Trace metal speciation in seawater from the Bulgarian Black Sea coast was studied in situ by hollow fiber permeation liquid membrane (HF-PLM) and by diffusion gradients in thin-film gels (DGT). The concentrations of Cd, Cu, Ni, and Pb determined by HF-PLM were lower than those measured by DGT, in agreement with their analytical windows, e.g., free metal ions provided by the HF-PLM and dynamic (mobile and labile) species by the DGT. The obtained suite of data was further used to evaluate the bioavailability of these metals to the microorganisms, which was then compared with experimental results of metal uptake to green microalga Chlorella salina. Uptake fluxes of the Cd,Cu,Ni, and Pbto C.salina, were predicted from the measured HF-PLM concentrations and laboratory experimentation in artificial seawater, in agreement with theoretical considerations. The HF-PLM and DGT appear to be promising analytical techniques for speciation and bioavailability studies in complex environmental media and allow improved understanding of the role of different chemical species in metal bioavailability (and impact) in seawaters.
机译：通过中空纤维渗透液膜（HF-PLM）和薄膜凝胶中的扩散梯度（DGT）原位研究了保加利亚黑海沿岸海水中的痕量金属形态。 HF-PLM测定的Cd，Cu，Ni和Pb的浓度低于DGT测定的浓度，与其分析窗口一致，例如HF-PLM提供的游离金属离子和动态（活动和不稳定）物质由DGT。将获得的数据集进一步用于评估这些金属对微生物的生物利用度，然后将其与金属对绿色微藻小球藻盐藻摄取的实验结果进行比较。根据理论上的考虑，通过在人造海水中测量的HF-PLM浓度和实验室实验，可以预测Cd，Cu，Ni和Pbto C.salina的吸收通量。 HF-PLM和DGT似乎是在复杂的环境介质中进行物种形成和生物利用度研究的有前途的分析技术，可以使人们更好地了解不同化学物质在海水中金属生物利用度（及其影响）中的作用。

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