Effect of Ferric Chloride on Rejection and Flux

At the high ferric chloride dosage (100 mgL ), the flux decline is high and, again, the membranes with a higher flux exhibit a greater flux decline. If stirring is stopped for these conditions, flux decline is about 90% for aU membranes. 

As for MF (see Chapter 5), rejection depends on the organic type. This dependence is stronger for the looser (100 kDa) membrane than for the tight 10 kDa membrane. Sdrring reduces rejection and ferric chloride dosage increases rejection for all membranes. This effect is also stronger for the looser membranes. 

HA is retained more than FA or NOM, due to stronger interaction with the precipitates. UV results are not presented here since the rejection based on UV is near complete due to the high UV absorbance of FeCls, which is retained. 

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