【摘要】 以三辛胺为络合剂,正辛醇为稀释剂,通过络合萃取-反萃取的方式,回收高浓度苯酚废水中的苯酚。利用响应曲面法研究了络合剂浓度、油水比、废水的p H值对萃取效率的影响。结果表明:以体积浓度为33.8%的三辛胺为络合剂,正辛醇为稀释剂,油水比为0.28,p H值为4.69,苯酚络合萃取率可以达到99.82%,此时萃余水相中苯酚的浓度为36 mg/L,完全可以实现苯酚的回收再利用。更多还原

【Abstract】 Complexation extraction and back extraction was used for the recovery of phenol in the highly concentrated phenol- containing waste water. Trioctylamine( TOA) and octanol acted as complexing solvent and extractant,respectively. The influence of complexing solvent concentration,oil- water ratio and p H value of wastewater on the extraction performance was investigated by response surface methodology. The results showed that the optimum extraction process was that: Use TOA as complexing solvent with volume concentration of 33. 8%,octanol as extractant,under the condition that,the oil- water ration was 0. 28,the p H value was 4. 69,the extraction efficiency was 99. 82% and the solubility of phenol in water was 36 mg / L,resulting in an achievement of the recovery of phenol.更多还原