The novel extraction gel membrane (EGM) prepared from polydimethylsiloxane-tetraethyl orthosilicatedi(2-ethylhexyl) phosphoric acid (PDMS-TEOS-D2EHPA) was applied in extraction of Ni ion. The basic physical and chemical properties of EGM were analyzed. The influences of the concentrations and flow rates of the two aqueous phases

aqueous phase temperature

module packing density

the feed circulation mode on the operation stability and Ni(Ⅱ) mass transfer flux of the EGM were explored. The results from 9 h experiments show that the highest extraction efficiency and the stability of EGM at the aqueous phase temperature of 22℃ were achieved in the condition of feed phase flow rate of 1900 ml·min-1

stripping flow rate of 93 ml·min-1

module packing density of 14% and the feed phase circulating through shell side

respectively. Finally

the operation stability of the EGM process were investigated and compared to conventional supported liquid membrane (SLM) process based on data from 60 h continuous running experiments. The results show that the conventional SLM suffered 100% flux loss within only 35 h

while the flux attenuation of EGM was merely 27.1% at the end of 60 h. Simultaneously

a 6.8 times promotion in initial flux compared to the traditional SLM was obtained. The results show dual advantages in improving both mass transfer efficiency and long-term operation stability of the EGM.