Hg and As mining-metallurgy plants have severely impacted environmental compartments. La Soterraña site (northern Spain) has been previously studied in this context. However, here we used a novel multi-purpose forensic approach to examine accumulations not only of mining-metallurgical waste (volumes above 80,000 t) but also C&D waste as a repository of pollutants (above 10% of As leached in standard tests) at this site. High Hg and As content in very fine grain-size fractions (up to 100,000 mg/kg of As in metallurgy waste below 10 μm) was significant, as was the predominance of As (III) in metallurgy waste. In addition, GC-MS techniques revealed the predominance of PAHs (secondarily Oxy-PAHs and PCBs), which showed a pyrogenic fingerprint, as determined by molecular ratios. Moreover, toxic organometallics (Hg-aromatics) were detected and metallurgy waste was identified as a source of dioxins and furanes (TEQ close to 30). On the basis of our observations, La Soterraña emerges as one of the most polluted sites in Europe and therefore requires urgent remediation. Our key findings indicate that C&D waste should be considered hazardous. Metallurgy waste, in turn, raises maximum concern given the simultaneous presence of toxic inorganic and organic contaminants.

中文翻译：

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对被含汞，砷，多环芳烃和二恶英的有害废物污染的范式棕地的多方面环境法证鉴定。

汞和砷采矿冶金厂严重影响了环境部门。在此背景下，以前曾研究过LaSoterraña厂址（西班牙北部）。但是，在这里，我们在这里使用了一种新颖的多功能法证方法，不仅检查了采矿冶金废物（80,000吨以上）的累积量，还检查了C＆D废物作为污染物的存储量（在标准测试中浸出的As的10％以上）现场。Hg和As含量非常高（在10μm以下的冶金废料中，高达100,000 mg / kg的As）非常重要，而As（III）在冶金废料中的占比也很高。此外，GC-MS技术揭示了PAH（主要是Oxy-PAH和PCB）的优势，通过分子比确定，PAH具有热原指纹。此外，检测到有毒的有机金属化合物（Hg-芳香族化合物），并将冶金废物确定为二恶英和呋喃的来源（TEQ接近30）。根据我们的观察，拉索特拉尼亚（LaSoterraña）成为欧洲污染最严重的地区之一，因此需要紧急补救。我们的主要发现表明，拆建废料应视为危险废物。鉴于同时存在有毒的无机和有机污染物，冶金废料引起了最大的关注。