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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-26-Ocak Saat 09:29 | Kayıtlı IP
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This paper focused on the control of ultrafiltration (UF)
membrane fouling caused by extracellular organic matter
(EOM) extracted from Microcystis aeruginosa through
pretreatment with mesoporous adsorbent resin (MAR) and
powdered activated
carboncarbon/powdered-activated-carbon.html">powdered activated
carbon water treatment(PAC). The influence of MAR
and PAC pretreatments on characteristics of EOM was
investigated using molecular weight (MW) fractionation,
DAX-8/XAD-4 resin fractionation and fluorescence
excitation-emission matrix (EEM) spectroscopy. The
results suggested that MAR mainly removed high-MW (> 100
kDa) fraction of EOM, while PAC primarily adsorbed low-MW
(< 1 kDa) fraction. Both MAR and PAC adsorption removed
more hydrophobic fraction than hydrophilic fraction. UF
experiments were carried out to evaluate the efficacies
of MAR and PAC pretreatments in EOM fouling control. MAR
pretreatment significantly reduced the reversible fouling
due to the efficient removal of high-MW fraction and the
consequent reduction of cake formation; whereas PAC
activated carbon
suppliers in indiaexhibited little ability in
alleviating the reversible fouling. Nevertheless, the
irreversible fouling, which accounted for a small part of
the total fouling, was mitigated by both MAR and PAC
pretreatments because they both reduced irreversible
adhesion caused by hydrophobic EOM. Overall, with respect
to EOM fouling control, MAR was much more efficient than
PAC.
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Konu: Powdered activated carbon in mitigating u
