Abstract The speciation of iron and arsenic species in DES media after electrodissolution of five different iron sulfide and arsenide minerals was determined via UV–Vis and EXAFS spectroscopy. Iron formed FeIII O-donor complexes, whilst arsenic formed cationic AsV-O-donor complexes. The ethylene glycol component of the DES was observed to play a role in the coordination of these species. The dissolution behaviour of these minerals was found to be strongly influenced by the sulfide or arsenide moiety, with arsenide and sulfarsenide minerals dissolving more slowly than the pure iron sulfides. Dissolution rates were also correlated to the band gap, with smaller band gaps resulting in faster dissolution.

中文翻译：

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研究硫化铁和砷化物矿物在深共晶溶剂中的溶解情况

摘要 通过紫外-可见光和 EXAFS 光谱测定了五种不同硫化铁和砷化物矿物电溶解后 DES 介质中铁和砷物种的形态。铁形成 FeIII O-供体配合物，而砷形成阳离子 AsV-O-供体配合物。观察到 DES 的乙二醇组分在这些物种的协调中发挥作用。发现这些矿物的溶解行为受硫化物或砷化物部分的强烈影响，砷化物和硫砷化物矿物的溶解速度比纯硫化铁更慢。溶解速率也与带隙相关，带隙越小，溶解速度越快。