DICHLOROANILINE RETENTION BY NANOFILTRATION PROCESS

摘要

This study evaluates the performance of two nanofiltration membranes in the removal of a herbicide: dichloroaniline. The selected membranes, one of polyamide the other of cellulose acetate, have a cut -off in the range 150-300 g/mol according to the manufacturers. The experiments were carried out with solutions of dichloroaniline in demineralized water, with concentrations ranging from 1 to 10 ppb. For each type of membrane the quantity of herbicide removed and adsorbed on the membrane was determined as a function of feed concentration and trans-membrane pressure. The results show that the two membranes made of different materials but having the same nominal cut - off retain dichloroaniline to very different extents.