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首页> 外文期刊>Separation and Purification Technology >Three-liquid-phase extraction systems for separation of phenol and P-nitrophenol from wastewater
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Three-liquid-phase extraction systems for separation of phenol and P-nitrophenol from wastewater

机译：从废水中分离苯酚和对硝基苯酚的三相液相萃取系统

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Several new three-liquid-phase extraction systems containing ethylene oxide-propylene oxide (EOPO)random copolymers have been developed.These systems were used for treating simulated wastewater containing phenol and p-nitrophenol (p-NP).Effects of pH,phase-forming components and their concentrations on partition behaviors of phenolic compounds were investigated.Results showed that phenol and p-NP could be unevenly and efficiently partitioned among the phases at pH 9.3,with about 80% phenol in the top phase and 95% p-NP in middle phase,respectively.Separation factor of two compounds increased remarkably with the increase of pH from 4.0 to 10.0.The three-liquid-phase system containing poly(ethylene glycol-ran-propylene glycol)and butyl acetate (BA)was proved to be suitable for phenol and p-NP separation.The separation factor was over 13 at pH 8.43.
机译：已开发出几种新的包含环氧乙烷-环氧丙烷（EOPO）无规共聚物的三相萃取系统，这些系统用于处理含苯酚和对硝基苯酚（p-NP）的模拟废水。结果表明，在pH 9.3时，苯酚和p-NP在各相之间分配不均，分布不均，其中苯酚在顶相中占80％，p-NP占95％。随着pH从4.0增加到10.0，两种化合物的分离因子显着增加。证明了由聚乙二醇-丙二醇和乙酸丁酯（BA）组成的三相体系适用于苯酚和对-NP的分离。分离度在pH 8.43时超过13。

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