Studying of the effect of many parameters on a bulk liquid membrane and its opposition in Cd(II) removal from wastewater

Abstract

Because of their tendency to accumulate in the body and their highly toxic potential, heavy metal pollution is becoming one of the main problems globally. The presented study examined the likelihood of eliminating heavy metals by means of the Bulk Liquid Membrane (BLM) method, which is a tool of high importance in various applications of such type. BLM is a simple type of liquid membrane which is showing excellent membrane stability yet insignificant solute fluxes. Therefore, this study outlines the BLM’s membrane resistance in removing heavy metals and recovery from the waste-waters. The cadmium (Cd) ions are fully prepared from the acidic aqueous solutions in this study with the use of the BLM. With regard to stirred transfer cell type, an experimental research has examined the recovery and extraction of Cd ions from synthetic wastewater solution via carrier Tri-butyl-phosphate TBP [C12H27O4P] with the use of BLM as an approach of separation. The impact of some parameters such as feed and stripping stirring speed, carrier concentration, membrane stirring speed, initial feed concentration, temperature, feed, and stripping phase pH is assessed for Cd removal. At pH 4 for feed, pH 10 for strip, 10 %(v/v) carrier concentration, 2 ppm initial concentration, 150 rpm,(S:F) = (1:1) in toluene, and the room temperature the maximal efficiency of extraction and stripping of cadmium (II) metal ions was 82 % and 93 %.

Emulsion Liquid Membranes Based on Os–NP/n–Decanol or n–Dodecanol Nanodispersions for p–Nitrophenol Reduction

“…Liquid membranes are systems made up of three immiscible phases: an aqueous source phase, which contains the chemical species of interest for valorization or removal from the system, an organic membrane phase that ensures the selective transport of the considered chemical species and an aqueous receiving phase in which it is immobilized [1][2][3]. Liquid membranes are usually differentiated based on the amount and form in which the membrane phase is found in the system and comprise volume liquid membranes (bulk liquid membranes, BLMs), liquid membranes on support (supported liquid membranes, SLMs) and emulsion liquid membranes (ELMs) [4][5][6]. Liquid membranes have been continuously developed because they ensure transport selectivity, allow for chemical reactions in the source, membrane and receiving phases, and can be made following various designs in order to meet process requirements (small investments, low productivity, large contact surfaces, easy operation, etc.)…”