This study, carried out in Radzimowice, a historical As mining site, analyzed the speciation and mineralogical As forms in soils, in different locations, as related to rock weathering processes and associated environmental risk. Four soil groups, including those on mine dumps, and in the stream valley, as well as stream sediments, were examined. The screening performed on 52 samples showed an extremely low actual As solubility, except for soils at reducing conditions. Nine samples were subjected to mineralogical analysis by microscopy and X-ray diffraction (XRD), and sequential extraction according to Wenzel. The results indicated that in all samples, As was associated mainly with amorphous Fe oxides, that constituted up to 66% of total As. Scanning electron microscopy–energy-dispersive spectroscopy (SEM-EDS) analysis performed on 3 representative samples revealed that the dump material contained the grains of primary As minerals, mainly arsenopyrite and loelingite, rimmed and encrusted with goethite. Stream sediments and the alluvial soil contained large amounts of (hydroxy)Fe-oxides, in which As was present in sparse scorodite grains and in highly dispersed forms associated with goethite and amorphous compounds of various compositions. The diversity of As species makes forecasting of its environmental fate difficult, therefore further research should focus on As transformations, particularly under reducing conditions.

中文翻译：

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西部南部拉德兹莫维采历史矿石开采和加工场中各种环境下土壤中的砷形态

这项研究是在Radzimowice（一个历史悠久的As采矿场）中进行的，分析了与岩石风化过程和相关的环境风险有关的土壤中不同位置的形态和矿物As形态。检查了四个土壤组，包括矿山场，溪谷和溪流沉积物中的土壤。对52个样品进行的筛选显示，除还原条件下的土壤外，实际的As溶解度极低。通过显微镜和X射线衍射（XRD）对9个样品进行了矿物学分析，并根据Wenzel进行了顺序提取。结果表明，在所有样品中，As主要与非晶态的Fe氧化物有关，占非晶态总Fe的66％。对3个代表性样品进行的扫描电子显微镜-能量色散光谱（SEM-EDS）分析表明，堆放物料中含有主要的As矿物晶粒，主要是毒砂和块锌矿，边缘并包裹有针铁矿。河流沉积物和冲积土中含有大量的（羟基）铁氧化物，其中砷以稀疏臭葱石颗粒的形式存在，并且以针铁矿和各种成分的无定形化合物的形式高度分散。砷物种的多样性使预测其环境命运变得困难，因此，进一步的研究应集中于砷的转化，特别是在还原条件下。河流沉积物和冲积土中含有大量的（羟基）铁氧化物，其中砷以稀疏臭葱石颗粒的形式存在，并且以针铁矿和各种成分的无定形化合物的形式高度分散。砷物种的多样性使预测其环境命运变得困难，因此，进一步的研究应集中于砷的转化，特别是在还原条件下。河流沉积物和冲积土中含有大量的（羟基）铁氧化物，其中砷以稀疏臭葱石颗粒的形式存在，并且以针铁矿和各种成分的无定形化合物的形式高度分散。砷物种的多样性使预测其环境命运变得困难，因此，进一步的研究应集中于砷的转化，特别是在还原条件下。