摘要
探讨了用活性炭吸附时,被吸附的六价铬离子的量与混合液pH之间的关系。试验表明:当混合液的pH超过11·0时,活性炭将很少甚至不再吸附六价铬离子。因此,检测深色革样中的六价铬离子浓度时,可以在混合液的pH大于11·0的情况下,采用活性炭对革样萃取液进行多次吸附脱色处理,达到完全去除革样本身颜色的目的,而不会引起六价铬离子含量的变化,这样就可以准确测出革样中六价铬离子的含量。
The relationship between the pH of the mixture and the Cr（ Ⅵ ） quantity adsorbed by active carbon is discussed. The results indicate that little or even no Cr（ Ⅵ ） may be adsorbed by active carbon when the pH of the mixture is higher than 11.0. A precise method to detect the Cr（ Ⅵ ） amount in deep color leather sample may＇be found accordingly. Therefore, before the amount of sexivalent chromium ion（Cr（ Ⅵ ） in the mixture is detected, the pH of the mixture should be adjusted to a value that is higher than 11.0. And then, active carbon is used to de-color the solution repeatedly until the dyestuff is adsorbed thoroughly. The amount of sexivalent chromium ion （Cr（ Ⅵ ） ） in the extraction mixture may be detected precisely and without any influence of dyestuff.
出处
《中国皮革》
CAS
北大核心
2006年第3期43-46,51,共5页
China Leather
基金
国家高技术研究发展计划(863计划)资助项目(编号:2003AA327100)
关键词
活性炭
吸附脱色
PH
六价铬离子
active carbon
de - color
pH
sexivalent chromium ion（Cr（ Ⅵ ） ）
