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近年来,国外已有关于溶剂萃取法处理含铬(Ⅵ)废水的报导,如用磷酸三丁酯(TBP)萃取含铬(Ⅵ)废水,铬(Ⅵ)的回收率很高(99.5%),反萃液中铬盐浓度可达200克/升,此法已在工业上获得应用。国内也有人用TBP作过这方面的研究,还有人用胺类萃取剂萃取含铬(Ⅵ)溶液,另有多篇文献报导了有关铬(Ⅵ)的萃取,其主要目的是用于铬(Ⅵ)的萃取分析。本文对各种常用的国产萃取剂磷酸三丁酯(TBP)、三辛基氧化膦(TOPO)、二甲庚
In recent years, foreign countries have reported about the solvent extraction of chromium (VI) wastewater treatment, such as the use of TBP extraction of chromium (VI) -containing wastewater, chromium (Ⅵ) recovery rate is high (99.5% , Stripping solution of chromium salt concentration up to 200 g / l, this method has been applied in the industry. Some people use TBP for this research, and some people use amine extractant to extract chromium (VI) solution. In addition, there are many reports on the extraction of chromium (VI), the main purpose is for chromium Ⅵ) extraction analysis. In this paper, a variety of commonly used domestic extractants tributyl phosphate (TBP), trioctylphosphine oxide (TOPO), dimethylammonium