USE OF ULTRAFILTRATION FOR REMOVAL OF DISOLVED ORGANIC MATTER (IV)
Date Issued
2000-07-31
Date
2000-07-31
Author(s)
DOI
892211E002011
Abstract
The objective of this work is
placed on understanding the role of
humic acid’s functional groups on UF
and PAC-UF performance.
To isolate humic acid fractions
bearing carboxylic functional groups
from phenolic functional groups, asecondary amine anionic exchanger resin
and DEAE anionic resin were employed
for this purpose. The secondary amine
anionic exchanger resin is able to bind
the humic acid fractions with phenolic
groups. The DEAE anionic resin can
react with the carboxylic group of a
humic acid. The isolated humic acid
fractions were examined for identifying
various functional groups with the use of
FTIR and a set of acid-base titration.
With these two different resins,
carboxyl-containing fractions can be
separated from the phenol-containing
fractions. The isolated humic acid
fractions were subject to the UF
performance evaluation in terms of flux
and water quality. Two different
membrane materials, hydrophobic
polysulfone (PS) and hydrophilic
regenerated cellulose acetate (CA) were
selected for UF experiments in this
study.
Solutions with carboxylic group
dominated humic acids caused the worst
flux decline. The situation was
adversely affected by the presence of
high EC. On the other hand, solutions
with phenolic group dominated humic
acid exhibited less membrane fouling
and were not profoundly affected by the
presence of high EC.
Membrane flux decline was not
improved significantly with the help of
PAC in PAC-UF operation. However,
the permeate flux of solutions with less
carboxyl groups doesn't tend to cause
additional flux decline.
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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