Zhang Xiaolei, Fan Linhua, Roddick Felicity A
Chemical and Environmental Engineering Department, School of Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Korea.
Membranes (Basel). 2018 Feb 1;8(1):7. doi: 10.3390/membranes8010007.
The influence of the interaction between aquatic humic substances and the algal organic matter (AOM) derived from on the fouling of a ceramic microfiltration (MF) membrane was studied. AOM alone resulted in a significantly greater flux decline compared with Suwannee River humic acid (HA), and fulvic acid (FA). The mixture of AOM with HA and FA exhibited a similar flux pattern as the AOM alone in the single-cycle filtration tests, indicating the flux decline may be predominantly controlled by the AOM in the early filtration cycles. The mixtures resulted in a marked increase in irreversible fouling resistance compared with all individual feed solutions. An increase in zeta potential was observed for the mixtures (becoming more negatively charged), which was in accordance with the increased reversible fouling resistance resulting from enhanced electrostatic repulsion between the organic compounds and the negatively-charged ceramic membrane. Dynamic light scattering (DLS) and size exclusion chromatography analyses showed an apparent increase in molecular size for the AOM-humics mixtures, and some UV-absorbing molecules in the humics appeared to participate in the formation of larger aggregates with the AOM, which led to greater extent of pore plugging and hence resulted in higher irreversible fouling resistance.
研究了水生腐殖质与源自[具体来源未给出]的藻类有机物（AOM）之间的相互作用对陶瓷微滤（MF）膜污染的影响。与苏万尼河腐殖酸（HA）和富里酸（FA）相比，单独的AOM导致通量下降显著更大。在单循环过滤试验中，AOM与HA和FA的混合物表现出与单独AOM相似的通量模式，表明在过滤早期通量下降可能主要由AOM控制。与所有单独的进料溶液相比，这些混合物导致不可逆污染阻力显著增加。观察到混合物的ζ电位增加（变得带更多负电荷），这与有机化合物和带负电荷的陶瓷膜之间静电排斥增强导致的可逆污染阻力增加一致。动态光散射（DLS）和尺寸排阻色谱分析表明，AOM-腐殖质混合物的分子尺寸明显增加，腐殖质中的一些吸光分子似乎参与了与AOM形成更大聚集体，这导致更大程度的孔堵塞，从而导致更高的不可逆污染阻力。
