Cloud point extraction of direct yellow.
Cloud point extraction of direct yellow.
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DOI：
10.1021/es049381x
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发表时间：
2005-03
影响因子：
11.4
通讯作者：
E. Tatara;K. Materna;A. Schaadt;H. Bart;J. Szymanowski
中科院分区：
文献类型：
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作者：
E. Tatara;K. Materna;A. Schaadt;H. Bart;J. Szymanowski
研究了含聚氧乙烯链的非离子表面活性剂胶束溶液中直接黄的浊点分离。染料的分离是一个重要的环境问题。此外，这种分离也可以被视为进一步研究生化回收的初步步骤。一些染料可以被认为是亲和配体，它们与生物化学物质形成络合物。染料的使用使得通过彩色视频观察富含表面活性剂的相分离的动力学成为可能。发现相分离是不完全的。水相中含有一定量的带有染料的表面活性剂小球。富含表面活性剂的相通常比水相具有更强的非均质性。在电解液(氯化钠)存在下，直接黄的回收率非常高。在氯化钠存在的情况下，分配系数很高，达到几百。在最佳条件下，一步脱色率可达98-99.9%。
The cloud point separation of Direct Yellow from micellar solution of various nonionic surfactants, containing a polyoxyethylene chain, was studied. The separation of dyes is an important environmental problem. Moreover, such separation can also be considered as a preliminary step for further studies of biochemical recovery. Some dyes can be considered as affinity ligands, which form complexes with biochemicals. The use of dye enabled the observation of the dynamics of surfactant-rich phase separation by means of a color video. It was found that the separation of phases was incomplete. The aqueous phase contained some amounts of surfactant globules with the dye. The surfactant-rich phase was usually more heterogenic than the aqueous phase. The recovery of Direct Yellow was very effective in the presence of electrolyte (NaCl). The distribution coefficients were high and equal to a few hundreds in the presence of sodium chloride. Under optimum conditions 98-99.9% of the dye could be removed in the one step.