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A Research on The Modification of Hollow Fiber Ceramic Membrane and Heavy Metal Ions Removal

Li Jianrong;Xu Lei;Xiao Hang;Institute of Urban Environment, Chinese Academy of Sciences;Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences;  
The preparation of hollow fiber ceramic membrane was prepared by phase transformation and high temperature sintering methods with bauxite as raw material.The diameter of the membrane tube is about 2 mm and the wall of tube is composed of a finger hole layer and a sponge layer.The surface pore size of hollow fiber ceramic membrane modified by goethite nanoparticles was reduced from 0.6~0.8 μm to 10~25 nm, and the permeate flux also decreased to about 1.6% of the original one.The removal efficiencies of modified hollow fiber ceramic membrane for the removal of Cd~(2+)and Pb~(2+) were more than 90% and 77%, respectively, by using of cross flow filtration.The cross flow filtration was affected by charge repulsion effect and sieving effect.
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