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Bioaccessibility of potentially toxic elements in mine residue particles
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2021-1-7 , DOI: 10.1039/d0em00447b Corona-Sánchez Jesús Eulises 1 , Ma Del Carmen A González-Chávez 1 , Rogelio Carrillo-González 1 , José Luis García-Cué 2 , Demetrio S Fernández-Reynoso 3 , Matthew Noerpel 4 , Kirk G Scheckel 4
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2021-1-7 , DOI: 10.1039/d0em00447b Corona-Sánchez Jesús Eulises 1 , Ma Del Carmen A González-Chávez 1 , Rogelio Carrillo-González 1 , José Luis García-Cué 2 , Demetrio S Fernández-Reynoso 3 , Matthew Noerpel 4 , Kirk G Scheckel 4
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Mining companies used to abandon tailing heaps in countryside regions of Mexico and other countries. Mine residues (MRs) contain a high concentration of potentially toxic elements (PTE). The wind can disperse dust particles (<100 μm) and once suspended in the atmosphere, can be ingested or inhaled; this is a common situation in arid climates. Nowadays, there is little information on the risk of exposure to PTEs from particulate matter dispersed by wind. The pseudo-total PTE in bulk and fractionated MR after aqua regia digestion, the inhalable bioaccessibility with Gamble solution (pH = 7.4), and the gastric bioaccessibility with 0.4 M glycine solution at pH 1.5 were determined. As and Pb chemical species were identified by X-ray absorption near-edge structure (XANES) spectroscopy. The highest rate of dispersion was observed with 74–100 μm particles (104 mg m−2 s−1); in contrast, particles <44 μm had the lowest rate (26 mg m−2 s−1). The highest pseudo-total As (35 961 mg kg−1), Pb (3326 mg kg−1), Cd (44 mg kg−1) and Zn (up to 4678 mg kg−1) concentration was in the <20 μm particles and As in the 50–74 μm (40 236 mg kg−1) particles. The highest concentration of inhaled bioaccessible As (343 mg kg−1) was observed in the <20 μm fraction and the gastric bioaccessible As was 744 mg kg−1, Pb was 1396 mg kg−1, Cd was 19.2 mg kg−1, and Zn was 2048 mg kg−1. The predominant chemical As species was arsenopyrite (92%), while 54% of Pb was in the adsorbed form. Erodible particle matter is a potential risk for humans in case of inhalation or ingestion.
中文翻译：
矿渣颗粒中潜在有毒元素的生物可及性
矿业公司过去常常放弃墨西哥和其他国家农村地区的尾矿堆。矿渣 (MR) 含有高浓度的潜在有毒元素 (PTE)。风可以吹散尘粒（<100 μm），一旦悬浮在大气中，就可以被摄入或吸入；这是干旱气候下的常见情况。如今，很少有关于暴露于风吹散的颗粒物质中的 PTE 风险的信息。测定了王水消化后散装和分级 MR 的假总 PTE、Gamble 溶液 (pH = 7.4) 的可吸入生物可及性和 0.4 M 甘氨酸溶液 (pH 1.5) 的胃生物可及性。通过 X 射线吸收近边结构 (XANES) 光谱鉴定 As 和 Pb 化学物质。-2秒-1 ); 相反，<44 μm 的颗粒的比率最低（26 mg m -2 s -1）。最高的假总 As (35 961 mg kg -1 )、Pb (3326 mg kg -1 )、Cd (44 mg kg -1 ) 和 Zn (高达 4678 mg kg -1 ) 浓度在 <20 μm颗粒和 50–74 μm (40 236 mg kg -1 ) 颗粒中的 As。在 <20 μm 部分观察到最高浓度的吸入生物可及 As (343 mg kg -1 )，胃生物可及 As 为 744 mg kg -1，Pb 为 1396 mg kg -1，Cd 为 19.2 mg kg -1， Zn 为 2048 mg kg -1. 主要的化学 As 物种是毒砂（92%），而 54% 的 Pb 是吸附形式。在吸入或摄入的情况下，可侵蚀的颗粒物质对人类来说是一种潜在的风险。
更新日期：2021-02-02
中文翻译：
矿渣颗粒中潜在有毒元素的生物可及性
矿业公司过去常常放弃墨西哥和其他国家农村地区的尾矿堆。矿渣 (MR) 含有高浓度的潜在有毒元素 (PTE)。风可以吹散尘粒（<100 μm），一旦悬浮在大气中，就可以被摄入或吸入；这是干旱气候下的常见情况。如今，很少有关于暴露于风吹散的颗粒物质中的 PTE 风险的信息。测定了王水消化后散装和分级 MR 的假总 PTE、Gamble 溶液 (pH = 7.4) 的可吸入生物可及性和 0.4 M 甘氨酸溶液 (pH 1.5) 的胃生物可及性。通过 X 射线吸收近边结构 (XANES) 光谱鉴定 As 和 Pb 化学物质。-2秒-1 ); 相反，<44 μm 的颗粒的比率最低（26 mg m -2 s -1）。最高的假总 As (35 961 mg kg -1 )、Pb (3326 mg kg -1 )、Cd (44 mg kg -1 ) 和 Zn (高达 4678 mg kg -1 ) 浓度在 <20 μm颗粒和 50–74 μm (40 236 mg kg -1 ) 颗粒中的 As。在 <20 μm 部分观察到最高浓度的吸入生物可及 As (343 mg kg -1 )，胃生物可及 As 为 744 mg kg -1，Pb 为 1396 mg kg -1，Cd 为 19.2 mg kg -1， Zn 为 2048 mg kg -1. 主要的化学 As 物种是毒砂（92%），而 54% 的 Pb 是吸附形式。在吸入或摄入的情况下，可侵蚀的颗粒物质对人类来说是一种潜在的风险。
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