A study on phenol migration by coupling the liquid membrane in the ionic liquid

Abstract

SynthesisLiquid membrane separation PhenolWastewater treatment a b s t r a c tThe environmental pollution of phenol is primarily taken as a result of wastewater discharged from some special chemical plants. It is the common pollutant to be controlled in industrial wastewater, and therefore, how to effectively minimize its environmental pollution by the phenolic pollutants treatment and recovery becomes an important subject. This paper aims to make a study on the support liquid membrane separation from phenolic wastewater in hydrated environment. The process of separation is conducted with hydrophobic ionic liquid 1-butyl-3-methylimidazole hexafluorophosphate [BMIM]PF 6 prepared by the microwave synthesis method based on fundamental solvent extraction research and applied to the inner coupling liquid membrane system. as the purpose is to migrate phenol in the simulated wastewater and survey the temperature, stirring speed, feed liquid phase acidity, initial concentration and NaOH concentration in the stripping phase influence on the phenol migration to obtain the preferred condition for migration.The said condition is as follows: The temperature of 300 K, the stirring speed ranging from 350 to 400 rpm, the feed liquid phase pH of 3.65, and NaOH concentration of 0.8 mol/L in the stripping phase. In the system, phenol is approximated to 100% in migration rate and the ionic liquid may be recycled for several times.

The preparation of ionic liquid doped graphene composite and its synergistic flame retardant effect with hexaphenoxy cyclotriphosphazene on epoxy resin

“…的结合能 [21,22] ，在 535.0 eV 和 533.9 eV 处的峰分别对应于 O-F 和 C-O-P 的 结合能 [22,23] ，在 688.4 eV 和 686.4 eV 处的峰分别是 C-F 和 P-F 键所对应的结 [25] ；同时，GnP@ILs 在燃烧 过程中形成致密的炭层，产生了所谓的"迷宫效应"，使热量和燃烧气体通向 聚合物基体的路径"曲折"，从而延缓了可燃气体与聚合物之间的直接接触 [26] 。另一方面由于 HPCTP 的加入会产生大量难燃气体如 NH3 和水蒸气等对可 燃性气体进行稀释，从而减缓复合材料的剧烈燃烧；并且 HPCTP 中含较多的磷， 会在凝聚相中产生磷酸、焦磷酸等物质促进残炭的生成 [27] 。 实际生活中，烟雾是火灾营救过程中的一个重要危害，降低烟雾的产生量 至关重要 [28]…”

A Study on DSLM Transporting the Rare Earth Metal La (III) with a Carrier of PC-88A

“…J. V. et al [ 17 ] reported the transmission of trivalent chromium in the liquid membrane system with the carrier of two (2-ethyl hexyl ) phosphonic acid. T. [ 18 ] researched the transmission of divalent and trivalent metal ions as selective migration in the supported liquid membrane system with carrier of new organic phosphonic acid. The research results show that, by using different extraction agents, the mixed ions Cu (I), Co (II), Ni (II), Pb (II), Fe(III), and Cd (II) can be separated well.…”