Use of carbon black nanoparticles to mitigate membrane fouling in ultrafiltration of river water
Use of carbon black nanoparticles to mitigate membrane fouling in ultrafiltration of river water
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DOI：
10.1016/j.seppur.2010.01.003
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发表时间：
2010-03-30
影响因子：
8.6
通讯作者：
Takizawa, Satoshi
中科院分区：
文献类型：
--
作者：
Lohwacharin, Jenyuk;Oguma, Kumiko;Takizawa, Satoshi
由于吸附能力有限和膜污染增加，混合吸附-膜过滤工艺的性能下降。在此，我们比较了炭黑（CB）纳米颗粒预吸附和粉末活性炭（PAC）在含天然有机物（NOM）的河水超滤过程中对后续膜污染的影响，采用非搅拌间歇式装置进行过滤和反冲洗。PAC虽能增强对小分子NOM的去除，但对减少污染效果不显著。CB对大分子NOM具有较高的吸附能力，可防止不可逆污染。由于结构的差异，CB滤饼比PAC滤饼更容易通过反冲洗分离。我们的研究结果表明，CB减轻了不可逆污染，减少了膜表面的亲性NOM沉积。(C) 2010 Elsevier B.V.版权所有
The performance of hybrid adsorption-membrane filtration processes can drop owing to limited adsorption capacity and increased membrane fouling. Here we compared preadsorption by carbon black (CB) nanoparticles and powdered activated carbon (PAC) on subsequent membrane fouling in the ultrafiltration of river water containing natural organic matter (NOM), using an unstirred batch setup with four cycles of filtration and backwashing. PAC was ineffective at reducing fouling although PAC enhanced removal of micromolecular NOM. CB had a high capacity to adsorb macromolecular NOM, and subsequently prevented irreversible fouling. The CB cake was more easily detachable by backwashing than the PAC cake because of structural differences. Our results demonstrate that CB mitigated irreversible fouling and reduced the deposition of transphilic NOM on the membrane surface. (C) 2010 Elsevier B.V. All rights reserved.