A spiral flowing supported liquid membrane based on DEHPA carrier for the separation of lead from seawater

作者：Ben Omar M^*; Mendiguchia C; Garcia Vargas M; Moreno C

来源：Desalination and Water Treatment, 2016, 57(13): 5715-5722.

DOI：10.1080/19443994.2015.1004199

• Spiral supported liquid membrane
• Lead
• Seawater
• Pre-concentration
• Extraction

This work aims to study the use of a spiral supported liquid membrane (SLM) to extract lead (Pb) from seawater matrix using the di-(2-ethylhexyl) phosphoric acid (DEHPA) dissolved in kerosene as carrier. In this regard, several physical and chemical parameters which could affect Pb extraction (sample pH, sodium acetate buffer, HNO3 concentration in stripping solution, masking agent effect, flow rate, filter porosity, and configuration of the SLM cell) were studied. In this sense, the permeability parameter was selected to probe the system efficiency. The optimal preconcentration factor was found to be of 14.2, after 2h under the following conditions: sample pH equal to 4.7 buffered until a 0.08M of sodium acetate, DEPHA concentration fixed at 0.21M and HNO3 concentration of 0.23M in stripping solution. Besides, SLM filters were analyzed by electron microscopy after each period of 2h and several microparticles and other deposits in form of a thin layer were observed in the polymeric support.

• 出版日期2016-3-15