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Mercury bioaccumulation by Juncus maritimus grown in a Hg contaminated salt marsh (northern Spain)
Marine Chemistry ( IF 3 ) Pub Date : 2020-07-25 , DOI: 10.1016/j.marchem.2020.103859
Efren Garcia-Ordiales , Nieves Roqueñí , Jorge Loredo

Juncus maritimus is the dominant halophyte in the marshes of the Nalón estuary, a Spanish area contaminated by mercury (Hg) as a consequence of mining activities. With the purpose of clarifying the Hg bioaccumualtion of this halophyte in this contaminated Hg salt marsh, sediments and Juncus maritimus samples were collected from seven locations. Hg uptake and allocation in the plant parts were evaluated in addition to the available, organic, and total concentrations in the buried sediments. The results showed that the presence of J. maritimus can modify the physico-chemical conditions of the salt marsh sediments where they grow, with an increase in the amount of potentially available Hg for uptake. In plants, most of the absorbed Hg (76.2to 97.3%) was retained in the root system, phytostabilising the element. J. maritimus accumulates high concentration of mercury in its organs, mainly in the buried parts, with enrichments from 3 to 24 times in the bioavailable Hg metal concentration detected in the sediments. Thus, J. maritimus could be used to stabilise Hg and hold it in the root system which could be useful in phytoremediation and phytostabilisation of saltmarsh areas contaminated by this problematic element.



中文翻译:

汞污染的盐沼中生长的杜鹃(Juncus maritimus)对汞的生物富集(西班牙北部)

marjunmus菌是纳隆河口沼泽地的主要盐生植物,纳隆河口是西班牙地区,因采矿活动而受到汞(Hg)污染。为了弄清这种盐生植物在受污染的Hg盐沼中的Hg生物富集性,从七个地点收集了沉积物和Marcusmus样品。除了评估埋藏沉积物中可利用的,有机的和总浓度外,还评估了植物部分中汞的吸收和分配。结果表明,海马链球菌的存在可以改变盐沼沉积物生长的物理化学条件,并增加潜在的汞吸收量。在植物中,大部分吸收的汞(76.2%至97.3%)保留在根系中,从而使该元素具有植物稳定性。Maritimus的器官中(主要是在埋藏的部分)积累了高浓度的汞,沉积物中检测到的生物利用汞金属的浓度富集了3到24倍。因此,J。maritimus可用于稳定Hg并将其保持在根系中,这可能对受该问题元素污染的盐沼地区的植物修复和植物稳定有用。

更新日期:2020-07-25
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