Behavior of gold colloid as model viruses during filtration through adsorptive ion exchange membranes

The anion exchange membranes had high rejection of the gold sols with flux three times greater than those of GVWP, whereas the cation exchange membranes and GVWP showed little capture as expected. The increase in pressure decreased the rejection rate of the gold sols indicating that residence time and binding kinetics may be a factor in the capture efficiency. Although 43 nm sol was less negative than 10 nm sol, its rejection was larger than that of 10 nm sol possibly because of the difference in the particle concentrations.