Garmsiri M, Mortaheb H R, Amini M H
a Oil Engineering Department , Chemistry and Chemical Engineering Research Center of Iran , PO Box 14335-186, Tehran , Iran.
Environ Technol. 2015 Jan-Feb;36(1-4):366-76. doi: 10.1080/09593330.2014.977826. Epub 2014 Nov 13.
A hybrid liquid membrane process was used to remove cadmium cation from a solution using bis-(2-ethylhexyl) phosphoric acid as the carrier for the first time. Different polyethersulphone supporting membranes were prepared by a phase inversion technique. The prepared membrane could be efficiently used as the supporting membranes for the proposed process. The effects of porosity and pore size of the supporting membrane on removal efficiency were investigated. In addition, the effects of various operating parameters such as carrier concentration in organic phase, pH of feed phase, acid concentration, and temperature on the performance of the process were also investigated. It was found that the maximum flux of cadmium is obtained using the supporting membrane with 84.5% porosity and the pore size of 132 nm. The optimum carrier concentration is 0.2 M, the optimum pH of the feed phase is 6, and the optimum concentration of acid in the stripping phase is 0.6 M.
首次使用混合液膜工艺，以双（2-乙基己基）磷酸为载体从溶液中去除镉阳离子。通过相转化技术制备了不同的聚醚砜支撑膜。所制备的膜可有效地用作所提出工艺的支撑膜。研究了支撑膜的孔隙率和孔径对去除效率的影响。此外，还研究了各种操作参数，如有机相中载体浓度、进料相pH值、酸浓度和温度对该工艺性能的影响。结果发现，使用孔隙率为84.5%、孔径为132 nm的支撑膜可获得镉的最大通量。最佳载体浓度为0.2 M，进料相的最佳pH值为6，反萃相中酸的最佳浓度为0.6 M。
