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Electrolyte removal by mixed matrix membranes based on polyurethane

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: G. Ciobanu, G. Carja

Editorial: Desalination, 250 (1-3), p.698-701, 2010.

Rezumat:

The membrane processes play a significant role in the water and wastewater treatment to remove dissolved
solids, especially electrolytes. In this study, the asymmetric mixed matrix membranes based on polyurethane
and SAPO-5 zeolite were used on electrolyte (NaCl) removal from water. Using a low operating pressure,
the membrane performances (i.e., pure water permeation, flux and salt rejection) were measured. All
membranes were showing an increase in water flux when the pressure was increased. This situation shows
that the produced membranes were stable in producing flux and were suitable to be used to proceed for
membrane testing process. Based on the results obtained, rejection of salt water increased as the pressure
given increased for each membrane. The mixed matrix membranes showed the high rejection for the salt
water (NaCl 0.02 M). This shows the good performance in both flux and rejection, and even achieves 98%
rejection for the NaCl 0.02 M. Based on the experimental results, it is believed that these mixed matrix
membranes are suitable for the electrolytes removal applications.

Cuvinte cheie: Mixed matrix membranes, Polyurethane, SAPO-5 zeolite, NaCl removal