Selenium and Other Trace Element Mobility in Waste Products and Weathered Sediments at Parys Mountain Copper Mine, Anglesey, UK
Selenium and Other Trace Element Mobility in Waste Products and Weathered Sediments at Parys Mountain Copper Mine, Anglesey, UK
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DOI：
10.3390/min7110229
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发表时间：
2017-11-01
期刊：
影响因子：
2.5
通讯作者：
Armstrong, Joseph G.
中科院分区：
文献类型：
--
作者：
Bullock, Liam A.;Parnell, John;Armstrong, Joseph G.
帕里斯山铜矿区（北威尔士安格尔西）有裸露的黄铁矿基岩、固体矿山废物堆和酸性排水（赭石沉积物）矿床。天然和废物沉积物都显示出包括硒（Se）在内的微量元素浓度升高，无论是从经济还是环境角度考虑。废冶炼厂中硒等半金属的浓度升高，突显了该矿和类似贱金属矿址的经济储量潜力。硒来源于黄铁矿基岩，在红色风化冶炼土中富集，但在风化粘土和粘土中损失。在基岩和风化沉积物中，Se与Te、Au、Bi、Cd、Hg、Pb、S和Sb相关。人工矿山废弃物沉积物显示富集As、Bi、Cu、Sb和Te，富Fe氧化物的熔炼材料含有高达1.5wt%的高Pb和高达1.2ppm的Au含量。微量元素As、Co、Cu和Pb从基岩保留到所有沉积物，包括富含铁氧化物的赭石沉积物中的高Cu含量。沉积物和沃茨中微量元素的高丰度和流动性应被视为该地区的潜在污染物，也是以前开采的和新的战略商品的经济储备的来源。
The Parys Mountain copper mining district (Anglesey, North Wales) hosts exposed pyritic bedrock, solid mine waste spoil heaps, and acid drainage (ochre sediment) deposits. Both natural and waste deposits show elevated trace element concentrations, including selenium (Se), at abundances of both economic and environmental consideration. Elevated concentrations of semi-metals such as Se in waste smelts highlight the potential for economic reserves in this and similar base metal mining sites. Selenium is sourced from the pyritic bedrock and concentrations are retained in red weathering smelt soils, but lost in bedrock-weathered soils and clays. Selenium correlates with Te, Au, Bi, Cd, Hg, Pb, S, and Sb across bedrock and weathered deposits. Man-made mine waste deposits show enrichment of As, Bi, Cu, Sb, and Te, with Fe oxide-rich smelt materials containing high Pb, up to 1.5 wt %, and Au contents, up to 1.2 ppm. The trace elements As, Co, Cu, and Pb are retained from bedrock to all sediments, including high Cu content in Fe oxide-rich ochre sediments. The high abundance and mobility of trace elements in sediments and waters should be considered as potential pollutants to the area, and also as a source for economic reserves of previously extracted and new strategic commodities.