Quantifying the influence of divalent cations mass transport on critical flux and organic fouling mechanism of forward osmosis membrane

Desalination ◽  
2021 ◽  
Vol 512 ◽  
pp. 115146
Author(s):  
Thanh-Tin Nguyen ◽  
Rusnang Syamsul Adha ◽  
Chulmin Lee ◽  
Dong-Ho Kim ◽  
In S. Kim
Keyword(s):  
Mass Transport ◽  
Divalent Cations ◽  
Forward Osmosis ◽  
Critical Flux ◽  
Fouling Mechanism ◽  
Organic Fouling

scholarly journals New insights into the organic fouling mechanism of an in situ Ca2+ modified thin film composite forward osmosis membrane

RSC Advances ◽  
2019 ◽  
Vol 9 (65) ◽  
pp. 38227-38234 ◽  
Author(s):  
Xiujuan Hao ◽  
Shanshan Gao ◽  
Jiayu Tian ◽  
Songxue Wang ◽  
Huizhong Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Forward Osmosis ◽  
Organic Substances ◽  
Film Composite ◽  
Fouling Mechanism ◽  
Thin Film Composite ◽  
Organic Fouling ◽  
Tfc Membrane

In this study, the effect of organic substances on the fouling behavior of a thin film composite (TFC) membrane with in situ Ca2+ addition (TFC-Ca membrane) was evaluated.

scholarly journals Influences of Combined Organic Fouling and Inorganic Scaling on Flux and Fouling Behaviors in Forward Osmosis

Membranes ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 115
Author(s):  
Youngpil Chun ◽  
Kwanho Jeong ◽  
Kyung Hwa Cho
Keyword(s):  
Thin Film ◽  
Bovine Serum Albumin ◽  
Calcium Ions ◽  
Forward Osmosis ◽  
Underlying Mechanism ◽  
Layer Formation ◽  
Film Composite ◽  
Thin Film Composite ◽  
Flux Decline ◽  
Organic Fouling

This study investigated the influence of combined organic fouling and inorganic scaling on the flux and fouling behaviors of thin-film composite (TFC) forward osmosis (FO) membranes. Two organic macromolecules, namely, bovine serum albumin (BSA) and sodium alginate (SA), and gypsum (GS), as an inorganic scaling agent, were selected as model foulants. It was found that GS scaling alone caused the most severe flux decline. When a mixture of organic and inorganic foulants was employed, the flux decline was retarded, compared with when the filtration was performed with only the inorganic scaling agent (GS). The early onset of the conditioning layer formation, which was due to the organics, was probably the underlying mechanism for this inhibitory phenomenon, which had suppressed the deposition and growth of the GS crystals. Although the combined fouling resulted in less flux decline, compared with GS scaling alone, the concoction of SA and GS resulted in more fouling and flux decline, compared with the mixture of BSA and GS. This was because of the carboxyl acidity of the alginate, which attracted calcium ions and formed an intermolecular bridge.

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