利用胶质气体泡沫气浮Cu(Ⅱ)

利用胶质气体泡沫气浮Cu(Ⅱ)
王运东;温涵真;戴猷元
【期刊名称】《化工学报》
【年(卷),期】2001(052)003
【摘要】Colloidal gas aphrons(CGAs) were first defined by Sebba(J.Colloid Interface Sci.,1971，35(4)：643) as micro bubbles(25—300*μm).These microbubbles do not coalesce easily and are markedly different from conventional soap bubbles in their stability and flow properties.CGAs are composed of a gaseous inner core surrounded by a thin surfactant film, which are created by intense stirring of a surfactant solution. CGA dispersion typically contains about 65% gas. CGA suspensions have viscosity similar to water, which make them suitable for pumping without deterioration in quality. Two important considerations in the application of CGA suspensions are: ① their colloidal size, resulting in a large su rface area to volume ratio, and ② the existence of a double film of surfactant encapsulating the gas that retards the coalescence of the bubble. CGA suspensions are found very effective for separating hydrophobic organic compounds and heavy metal ions. In this paper, flotation of Cu(Ⅱ) by colloidal gas aphrons has been conducted in order to explore a new method for separating heavy metal ions from dilute solution. The effects of CGA flow rate, amounts of CGA introduced to the system, surfactant concentration on the flotation efficiency have been systematically
investigated. The optimum flotation condition is determined. The results show that flotation efficiency at pH=5—6 has an optimum value to CGA flow rate and amount. When pH is greater than 7, the flotation efficiency can be as high as 99% at the optimum condition.
【总页数】4页(P266-269)
【作者】王运东;温涵真;戴猷元
【作者单位】清华大学化学工程系，;清华大学化学工程系，;清华大学化学工程系，【正文语种】中文
【中图分类】TQ028.8
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