Purkait M K, DasGupta S, De S
Department of Chemical Engineering, Indian Institute of Technology, Guwahati, Guwahati 781039, India.
J Hazard Mater. 2006 Sep 21;137(2):827-35. doi: 10.1016/j.jhazmat.2006.03.003. Epub 2006 Apr 5.
Cloud point extraction (CPE) is carried out to extract chrysoidine dye from aqueous solution using two different non-ionic surfactants, TX-100 and TX-114. The effects of different operating parameters, e.g., concentrations of surfactant, dye and salt, temperature, pH on extraction of both dye and surfactant have been studied in detail. The extraction of dye increases with temperature, surfactant concentration and salt concentration. Various design parameters of a CPE process have been estimated by developing correlations for dye solubilization and fractional coacervate phase volume with the operating conditions. The equilibrium solubilization data at four different temperatures follow Langmuir type isotherm. A method is presented to calculate the feed surfactant concentration required for the removal of dyes up to a level of 3.82x10(-6) M. The developed correlations may be useful to design a cloud point extractor of a desired efficiency.
采用浊点萃取（CPE）法，使用两种不同的非离子表面活性剂TX - 100和TX - 114从水溶液中萃取金橙黄染料。详细研究了不同操作参数，如表面活性剂、染料和盐的浓度、温度、pH值对染料和表面活性剂萃取的影响。染料的萃取率随温度、表面活性剂浓度和盐浓度的增加而提高。通过建立染料增溶和凝聚相体积分数与操作条件之间的相关性，估算了CPE过程的各种设计参数。四个不同温度下的平衡增溶数据符合朗缪尔等温线。提出了一种计算去除高达3.82×10⁻⁶ M水平染料所需进料表面活性剂浓度的方法。所建立的相关性对于设计具有所需效率的浊点萃取器可能是有用的。
