2 resultados para 336-U1383C
em Deakin Research Online - Australia
Resumo:
A major concern in solvent extraction processes is the loss of extractant into the aqueous phase due to its slight solubility in the aqueous phase. Similarly, in membrane extraction processes, extractant loss through extractant leakage from the membrane into the aqueous phase is also a concern. Several published membrane extraction studies using Aliquat 336 as the extractant, have expressed this concern, but none has studied extractant leakage quantitatively. It is the authors’ opinion that the extractant leakage should be considered as a technical parameter of a membrane. In our laboratory active progress has been made in using Aliquat 336 ‘entangled’ into the polymer membranes to remove heavy metal ions from wastewater samples. In this work, we studied the loss of Aliquat 336 from the point of view of its solubility in aqueous solutions. The results showed that the solubilities of Aliquat 336 in an aqueous phase acidified with 2 M HCl is about 0.1 g/100 m/ of the solution. This figure provides a useful guideline for evaluating the leakage of the Aliquat 336 extractant from the membranes.
Resumo:
There is no more imposing figure in the history of Australian anthropology than W.E.H. ('Bill') Stanner (1905-1981). While some of his contemporaries produced more ethnography, none matched his skill and eloquence in describing the life-worlds of Aboriginal people. While others of his age were just as closely involved in arguing for the defensibility of Aboriginal society, none did so with such convincing passion. With these two legacies in mind, anthropologists in the here and now would be hard put to describe Stanner's oeuvre in either/or terms. He is best remembered for his scintillating, sympathetic analyses of Aboriginal myth, ritual and local organisation, together with his trenchant critiques of Durkheim and Freud.
