Kim Kyung-Jo, Jang Am
Graduate School of Water Resources, Sungkyunkwan University, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
Graduate School of Water Resources, Sungkyunkwan University, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
Chemosphere. 2018 Apr;196:440-452. doi: 10.1016/j.chemosphere.2018.01.011. Epub 2018 Jan 5.
To enhance the removal of natural organic matter (NOM) in ceramic (Ce) membrane filtration, an iron-aluminum binary oxide (FAO) was applied to the ceramic membrane surface as the adsorbent cake layer, and it was compared with heated aluminum oxide (HAO) for the evaluation of the control of NOM. Both the HAO and FAO adsorbent cake layers efficiently removed the NOM regardless of NOM's hydrophobic/hydrophilic characteristics, and the dissolved organic carbon (DOC) removal in NOM for FAO was 1-1.12 times greater than that for HAO, which means FAO was more efficient in the removal of DOC in NOM. FAO (0.03 μm), which is smaller in size than HAO (0.4 μm), had greater flux reduction than HAO. The flux reduction increased as the filtration proceeded because most of the organic foulants (colloid/particles and soluble NOM) were captured by the adsorbent cake layer, which caused fouling between the membrane surface and the adsorbent cake layer. However, no chemically irreversible fouling was observed on the Ce membrane at the end of the FAO adsorbent cake layer filtration. This means that a stable adsorbent cake layer by FAO formed on the Ce membrane, and that the reduced pure water flux of the Ce membrane, resulting from the NOM fouling, can easily be recovered through physicochemical cleaning.
为了提高陶瓷（Ce）膜过滤中天然有机物（NOM）的去除率，将铁铝二元氧化物（FAO）作为吸附剂滤饼层应用于陶瓷膜表面，并与加热氧化铝（HAO）进行比较以评估对NOM的控制效果。HAO和FAO吸附剂滤饼层均能有效去除NOM，无论NOM的疏水/亲水特性如何，FAO对NOM中溶解有机碳（DOC）的去除率比HAO高1 - 1.12倍，这意味着FAO在去除NOM中的DOC方面更高效。尺寸比HAO（0.4μm）小的FAO（0.03μm）通量下降比HAO更大。随着过滤进行通量下降增加，因为大多数有机污垢物（胶体/颗粒和可溶性NOM）被吸附剂滤饼层捕获，这导致了膜表面和吸附剂滤饼层之间的污染。然而，在FAO吸附剂滤饼层过滤结束时，Ce膜上未观察到化学不可逆污染。这意味着在Ce膜上形成了由FAO构成的稳定吸附剂滤饼层，并且由NOM污染导致的Ce膜纯水通量降低可以通过物理化学清洗轻松恢复。
