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首页> 外文期刊>Geochemistry: exploration, environment, analysis >The impact of former mining activity on soils and plants in the vicinity of an old mercury mine (Vallalta, Belluno, NE Italy)
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The impact of former mining activity on soils and plants in the vicinity of an old mercury mine (Vallalta, Belluno, NE Italy)

机译：前采矿活动对旧水银矿附近的土壤和植物的影响（Vallalta，Belluno，Ne Italy）

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摘要

Exploitation of ore minerals (cinnabar, chalcopyrite, sphalerite) from the old mine in Vallalta (Belluno, NE Italy) has resulted in serious environmental impacts, including the acidification of water, and the contamination of soils and plants. Forty-eight soil samples and four wild plants were examined at four sites in the vicinity of the mine (<100 m), where mine waste was discharged. After digestion with aqua regia, chemical analyses were carried out on both soils and plants by inductively coupled plasma-optical emission spectroscopy (ICP-OES) for potentially harmful elements (Cr, Cu, Ni, Pb, Zn, Fe, Mn); the mercury concentration was directly ascertained by atomic absorption spectrometry (AAS). The levels of Ni, Cr, Mn and Zn in the soils were generally below the 'normal' levels for uncontaminated sites. Conversely, more than 50% of the examined samples presented Cu and Pb concentrations higher than the phytotoxic level (10 mg kg(-1)). Iron concentrations exceeded normal values (<300 mg kg(-1)) in 65% of the examined samples. The mercury concentration was high (6-21 mg kg(-1)) in all soil samples, mostly above the phytotoxicity limit (10 mg kg(-1)). Chaerophyllum hirsutum presented the highest Hg levels in roots, up to the phytotoxicity level (10 mg kg(-1)).
机译：芦荟矿物（朱砂，黄铜矿，闪锌矿）从Vallalta（Belluno，Ne Italy）的老矿，导致了严重的环境影响，包括水的酸化，以及土壤和植物的污染。在矿山附近的四个地点进行四十八种土壤样品和四种野生植物，其中矿井废物排出。用Aqua Regia消化后，通过电感耦合的等离子体 - 光发射光谱（ICP-OES）对两种土壤和植物进行化学分析，用于潜在的有害元素（Cr，Cu，Ni，Pb，Zn，Fe，Mn）;通过原子吸收光谱法（AAS）直接确定汞浓度。土壤中Ni，Cr，Mn和Zn的水平通常低于未污染位点的“正常”水平。相反，超过50％的检查样品呈现出高于植物毒水平的Cu和Pb浓度（10mg kg（-1））。在65％的检查样品中超过正常值（<300mg kg（-1））。所有土壤样品中汞浓度高（6-21mg（-1）），大部分高于植物毒性极限（10mg kg（-1））。 Chaerophyllum hirsutum在根中呈现最高的Hg水平，直至植物毒性水平（10mg kg（-1））。

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