摘要
提出以聚酰胺树脂为吸附剂，在弱酸和中性介质中，静态和动态操作条件下，对环境水中铬（Ⅵ）和铬（Ⅲ）的选择性吸附分离方法。在选定条件下，树脂对铬（Ⅵ）有很强的吸附能力，饱和吸附容量为１０．６ ｍｇ／ｇ（水介质中）和１２．８ｍｇ／ｇ（ｐＨ１．０的Ｈ２ＳＯ４介质中），而铬（Ⅲ）几乎不被吸附，当铬（Ⅵ）和铬（Ⅲ）含量比在１：５～５：１范围变化时均可得到满意分离。用０．０２ｍｏｌ／Ｌ硫酸。０．０２５ ｍｏｌ／Ｌ抗坏血酸混合液解脱树脂上吸附的铬（Ⅵ），再以二苯碳酰二肼光度法测定，并将其用于实际水样中铬（Ⅵ）和格（Ⅲ）的分离和测定。
A new method for the concentration and separation of chromium(Ⅲ ) and chromium (Ⅵ) in environmental water with polyamide resin was developed. This procedure is based on the fact that Cr(Ⅵ ) can be absorbed on the polyamide resin in the solution of pH1 or 7 and Cr(Ⅲ )can not be absorbed. It is shown that excellent separations were obtained in the range of ratio between the concentration of chromium (Ⅵ )and chromiun (Ⅲ ) being 1: 5 and 5: 1. Under the optimum experimental conditions, the adsorption capacity of Cr(Ⅵ) is 12. 8 mg/g in the solution of H2SO4 at pH 1 .0 and 10.6 mg/g in water.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第8期963-966,共4页
Chinese Journal of Analytical Chemistry
关键词
聚酰胺
铬
吸附
分离
五价
三价
测定
环境水样
Polyamide resin, chromium (Ⅲ), chromium (Ⅵ), enrichment, separation
