摘要
A new kind of precipitate,antimony arsantimonate,was found during the precipitation reactions in acidic solution containing As(Ⅲ),Sb(Ⅲ) and Sb(Ⅴ) by means of chemical analysis,SEM,XRD and IR spectrometry.The results show that the As content in antimony arsantimonate increases with the increase of n(As(Ⅲ))/n(Sb) in solution and the content of component Sb(Ⅲ) and Sb(Ⅴ) remains almost constant with the variation of n(Sb(Ⅲ))/n(Sb(Ⅴ)) in solution.The antimony arsantimonate is a kind of floccules with size of 1-5 μm.The crystal performance of the compound gets better with the decrease of n(As(Ⅲ))/n(Sb),the cell parameter of which is near to 10.33×10-10 m under different n(As(Ⅲ))/n(Sb) and As atom locates on the surface,not in the inner of the grain.The chemical bonds of As-OH,Sb-OH,As-O-Sb,Sb-O-Sb and O-H of the precipitate are included in the precipitate.The chemical structure of precipitate is described as Sb(OH)2-O-[Sb(OH)3-(O-As(OH)-O-Sb(OH)3)3]-O-Sb(OH)2·xH2O.The structure analysis shows that the copper electrolyte can be purified by As(Ⅲ) because the antimony arsantimonate precipitate forms.
A new kind of precipitate, antimony arsantimonate, was found during the precipitation reactions in acidic solution containing As（Ⅲ）, Sb（Ⅲ） and Sb（ Ⅴ ） by means of chemical analysis, SEM, XRD and IR spectrometry. The results show that the As content in antimony arsantimonate increases with the increase of n（As（Ⅲ）/n（Sb） in solution and the content of component Sb（Ⅲ） and Sb（Ⅴ） remains almost constant with the variation of n（Sb（Ⅲ））/n（Sb（Ⅴ）） in solution. The antimony arsantimonate is a kind of floccules with size of 1-5 μm. The crystal performance of the compound gets better with the decrease of n（As（Ⅲ））/n（Sb）, the cell parameter of which is near to 10.33×10^-10m under different n（As（Ⅲ））/n（Sb） and As atom locates on the surface, not in the inner of the grain. The chemical bonds of As--OH, Sb---OH, As---O--Sb, Sb--O---Sb and O---H of the precipitate are included in the precipitate. The chemical structure of precipitate is described as Sb（OH）2---O--[Sb（OH）3--（O---As（OH）--O---Sb（OH）3）3]----O--- Sb（OH）2·xH2O. The structure analysis shows that the copper electrolyte can be purified by As（Ⅲ） because the antimony arsantimonate precipitate forms.
出处
《中国有色金属学会会刊：英文版》
CSCD
2008年第5期1275-1279,共5页
Transactions of Nonferrous Metals Society of China
关键词
砷
净化作用
铜电解液
锑
arsenic
purification
copper electrolyte
mechanism
antimony arsantimonate
