摘要
大量的金是从金矿中获得.但需要很多工序。从含金的废液、废料中再生回收金也是获得金的重要来源,如:化学电镀法、电解法、硫脲法等都比较简单易行,但有各自的局限性和缺陷。20世纪70年代.炭吸附技术应用到提金业旧.但载金炭洗脱过程复杂、活性炭的碎裂磨损和再生等一系列问题需进一步解决。近年来有关含氮、氧、磷的树脂吸附某些金属离子的研究比较活跃.
Sorption behavior and mechanism of D201×4 resin for Au(Ⅲ) were investigated. D201×4 resin has a good adsorptivity for Au(Ⅲ) in HAc-NaAc medium at pH value of 2.63. The statically saturated Au(Ⅲ) sorption capacity was 689.11 mg·g^-1 resin. The Au(Ⅲ) adsorbed on D201×4 resin could be eluted by 10%NH2CSNH2-1 mol·L^-1 HCl (1:1) and the elution rate was 92.2%.The adsorption of Au(Ⅲ) on D201×4 follows the Freundlich isotherm. The AH of the adsorption was 11.03 kJ· mol^-1. The sorption rate constant was 5.42× 10^-5 s^-1. The activation energy was 13.26 kJ ·mol^-1. The molar coordination ratio of the functional group of D201×4 to Au(Ⅲ) was about hl. The adsorption mechanism of resin for Au(Ⅲ) was suggested according to chemical analysis and IR spectraoscopy results.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第5期911-914,共4页
Chinese Journal of Inorganic Chemistry
基金
浙江省高校中青年学科带头人基金
浙江省自然科学基金项目(No.20040550)
浙江省教育厅科研项目(No.20031146)。