论文部分内容阅读
在元素分离中,由于巯基棉具有富集倍数大、富集速度快、选择性高、易于制备等优点,已被广泛应用于环境试样中一些重金属离子的富集和分离。文献将巯基棉用于贵金属的富集,成功地分离了某些冶金物料中的金和钯。我们也用巯基棉富集了含量在xx克/吨以上冶金物料中的金、钯和铂。被巯基棉吸附的金和钯难于洗脱,文献推荐用氢氧化钠溶液同时洗脱金和钯,文献则直接将巯基棉溶于王水以解脱金、钯和铂。本实验发现,氢碘酸-盐酸溶液可定量洗脱被巯基棉吸附的金,此时钯定量保留在巯基棉上,然后再用溴酸钠-盐酸溶液洗脱钯。研究了洗脱条件并初步探讨了吸附机理。用本法分离
In elemental separation, mercapto-cotton has been widely used in the enrichment and separation of some heavy metal ions in environmental samples because of its advantages such as enrichment multiple, enrichment speed, high selectivity and easy preparation. The literature uses mercapto cotton for enrichment of precious metals and successfully separates gold and palladium from some metallurgical materials. We also use thiol cotton to enrich gold, palladium and platinum in metallurgical materials of xx g / tonne. Gold and palladium adsorbed on thiol cotton are difficult to elute. It is recommended in the literature that both gold and palladium be eluted simultaneously with sodium hydroxide solution. Literature directly dissolves sulfhydryl cotton in aqua regia to liberate gold, palladium and platinum. The experiment found that hydriodic acid - hydrochloric acid solution can quantitatively elute gold adsorbed by thiol cotton, when the quantitative retention of palladium in thiol cotton, and then use sodium bromate - hydrochloric acid solution to elute palladium. The elution conditions were studied and the adsorption mechanism was preliminarily discussed. Separation with this method