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Khan, Sovann,Kim, Jeonghwan,Sotto, Arcadio,Van der Bruggen, Bart Elsevier 2015 Journal of industrial and engineering chemistry Vol.21 No.-
<P><B>Abstract</B></P> <P>The binary TiO<SUB>2</SUB>–ZrO<SUB>2</SUB> particles were better alternative to TiO<SUB>2</SUB> particles as photocatalyst to reduce humic acid fouling in photocatalytic membrane reactor. The structure of the TiO<SUB>2</SUB>–ZrO<SUB>2</SUB> particles was strongly dependent upon the content of zirconium as an additive. A composition of 50% TiO<SUB>2</SUB> with 50% ZrO<SUB>2</SUB> was optimal in terms of physicochemical properties. The effect of TiO<SUB>2</SUB>–ZrO<SUB>2</SUB> particles on the reduction of humic acid fouling was further improved by the presence of divalent cations such as calcium. Nevertheless, the stability of polymeric membranes in longer-term operation using a hybrid photocatalytic membrane reactor for water treatment applications may remain a challenge.</P>
Humic acid fouling in a submerged photocatalytic membrane reactor with binary TiO2–ZrO2 particles
Sovann Khan,김정환,Arcadio Sotto,Bart Van der Bruggen 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The binary TiO2–ZrO2 particles were better alternative to TiO2 particles as photocatalyst to reduce humicacid fouling in photocatalytic membrane reactor. The structure of the TiO2–ZrO2 particles was stronglydependent upon the content of zirconium as an additive. A composition of 50% TiO2 with 50% ZrO2 wasoptimal in terms of physicochemical properties. The effect of TiO2–ZrO2 particles on the reduction ofhumic acid fouling was further improved by the presence of divalent cations such as calcium. Nevertheless, the stability of polymeric membranes in longer-term operation using a hybridphotocatalytic membrane reactor for water treatment applications may remain a challenge.
Hamidreza Sanaeepur,Samaneh Mashhadikhan,Ghassem Mardassi,Abtin Ebadi Amooghin,Bart Van der Bruggen,Abdolreza Moghadassi 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.8
Commercial poly (ether-block-amide) (Pebax®) copolymers are thermoplastic elastomers that have attracted attention as membrane materials due to their high performance in CO2 separation. In this study, a cross-linking reaction is reported as a viable strategy to improve the gas separation performance of a highly permeable but low selective Pebax 2533 membrane. To this end, a new bi-functional aminosilane cross-linker (3-aminopropyl(diethoxy)methylsilane (APDEMS)) was applied. Cross-linked Pebax 2533 membranes were prepared via solution-casting with different amounts of APDEMS ranging from 0.5 to 4 wt%, to investigate the effect of the aminosilane concentration on the membrane performance. Gas separation with prepared membranes was studied for CO2/N2 at the feed pressure ranges of 2-10 bar. Instrumental analyses were applied to investigate the effect of the cross-linking reaction on the structure and properties of the membranes. The results showed that a 2 wt% APDEMS cross-linked Pebax 2533 membrane has the best gas separation performance. The CO2/N2 ideal selectivity of the cross-linked Pebax 2533 increased twice compared to the neat Pebax 2533 membrane at the feed pressure of 2 bar, while the CO2 permeability experienced a slight decrease by cross-linking, but still remains higher than the permeability of other Pebax grades.
Deposition of toxic metal particles on rough nanofiltration membranes
Oluranti Agboola,Jannie Maree,Richard Mbaya,Caliphs Musa Zvinowanda,Gomotsegang Fred Molelekwa,Nora Jullok,Bart Van der Bruggen,Alexander Volodine,Chris Van Haesendonck 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.8
Two nanofiltration (NF90 and Nano-Pro-3012) membranes were investigated for their capacity to removemetal ions. This study presents the effect of membrane roughness on the removal of toxic metal ions during dead endmembrane filtration. Atomic force microscopy, scanning electron microscopy, WSXM software and ImageJ were usedto characterize the roughness of the membranes. Gradual decrease in filtration permeate flux was observed as foulantsaccumulated at the interface of the membranes; filtration permeate flux varied from 20 L/m2/h to 14 L/m2/h and 11 L/m2/h to 6 L/m2/h for NF90 and Nano-Pro-3012, respectively. NF90 membrane was more prone to fouling than the Nano-Pro-3012 membrane: the percentage flux reduction was higher for NF90 (3.6%) than Nano-Pro-3012 (0.98%). Thebearing ratio of the fouled NF90 exhibited a high peak of 7.09 nm than the fouled Nano-Pro-3012 with the peak of6.8 nm.