This study investigates the possibility of recycling arsenic sulfide cakes by heat treatment with the addition of elemental sulfur. The structure of the initial cake as an X-ray amorphous dispersed arsenic sulfide with impregnations of lead sulfate and copper oxide is established. The main phases characterizing the microstructure of the cake are conglomerates of complex composition in the form of nonstoichiometric arsenic sulfide with inclusions of arsenic and copper oxides, as well as nonstoichiometric arsenic oxide with an admixture of arsenic and copper sulfides. Alloying of the cake with elemental sulfur ensures its compaction and vitrification. In the alloy samples, phases of nonstoichiometric arsenic sulfide and lead oxysulfate are detected. When the alloy is leached, the solubility of arsenic is below the threshold according to the TCLP method (i.e., 3.7–3.3 mg/dm³), which enables the burial of the material as ordinary waste.

这项研究研究了通过添加元素硫进行热处理来回收硫化砷饼的可能性。建立了初始饼的结构，该结构为含硫酸铅和氧化铜的X射线无定形分散的硫化砷。表征滤饼微观结构的主要相为具有非化学计量的硫化砷形式的复杂组成的团块，其中包含砷和氧化铜，以及非化学计量的氧化砷以及砷和硫化铜的混合物。滤饼与元素硫的合金化可确保其压实和玻璃化。在合金样品中，检测到非化学计量的硫化砷和硫酸氧铅的相。浸出合金后³），这使得该材料可以像普通废物一样被掩埋。