Hamon R F, Chow A
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada.
Talanta. 1984 Nov;31(11):963-73. doi: 10.1016/0039-9140(84)80229-5.
The extraction of cobalt (II) from aqueous thiocyanate solutions with polyurethane foam has been extensively investigated. The extraction is enhanced by high thiocyanate concentration, high ionic strength and low temperature. A pH of 1.0-9.0 can be used for efficient extraction. Cobalt can be extracted at low concentration and the distribution coefficient is independent of foam weight. Several foam types and foam pretreatments have been examined. The effect of various substances added to the cobalt thiocyanate solutions has been investigated. Some of these substances caused either enhanced or decreased extractions by interacting with the polyurethane foam or by changing the solution chemistry.
利用聚氨酯泡沫从硫氰酸盐水溶液中萃取钴（II）已得到广泛研究。高硫氰酸盐浓度、高离子强度和低温可增强萃取效果。pH值为1.0 - 9.0时可实现高效萃取。钴可在低浓度下被萃取，且分配系数与泡沫重量无关。已考察了几种泡沫类型和泡沫预处理方法。研究了向硫氰酸钴溶液中添加各种物质的影响。其中一些物质通过与聚氨酯泡沫相互作用或改变溶液化学性质，导致萃取效果增强或降低。
