El-shahat M F, Moawed E A, Zaid M A A
Chemistry Department, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt.
Talanta. 2003 Apr 10;59(5):851-66. doi: 10.1016/S0039-9140(02)00432-0.
The present work describes a novel method for the incorporation of Nile blue A into polyurethane foam matrix. This foam material was found to be very suitable for the extraction of metal ions from aqueous solutions. The characterization of Nile blue A grafted foam and the effect of halide concentration, pH, shaking time, extraction isotherm and capacity have been investigated. This foam material was found to be suitable for the separation and preconcentration of iron (III), zinc (II), cadmium (II) and mercury (II) from waste water. The extraction was accomplished in (15-20) minutes. Iron was separated from acid medium (2-4 M HCl), zinc from (3-5 M HCl), cadmium from (4-6 M HCl) as thiocyanate complexes and mercury was separated from (1-2 M HCl) as chloride.
本工作描述了一种将尼罗蓝A掺入聚氨酯泡沫基质的新方法。发现这种泡沫材料非常适合从水溶液中萃取金属离子。研究了尼罗蓝A接枝泡沫的表征以及卤化物浓度、pH值、振荡时间、萃取等温线和容量的影响。发现这种泡沫材料适用于从废水中分离和预富集铁（III）、锌（II）、镉（II）和汞（II）。萃取在（15 - 20）分钟内完成。铁从酸性介质（2 - 4 M盐酸）中分离，锌从（3 - 5 M盐酸）中分离，镉从（4 - 6 M盐酸）中以硫氰酸盐络合物形式分离，汞从（1 - 2 M盐酸）中以氯化物形式分离。
