Performance change formula of cellulose triacetate hollow fiber RO membranes due to oxidation and hydrolysis

Kumano, Atsuo; Matsui, Yoichi; Numata, K.; Fujiwara, Nobuya; Iwahashi, Hideo; NAGAI, Masahiko

doi:10.1016/0011-9164(94)85194-8

Cited by 10 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…18 The additional recommendation that dialyzers be stored under cool and dry conditions will also minimize degradation. [19][20][21][22][23] Under such conditions, chain scission is the major degradation route, but deacetylation can occur over time if the dialyzer membrane was inadvertently exposed to a solution of pH less than 4 during manufacturing. At ambient temperatures, these reaction rates are slow, so long periods are required to allow the deacetylated degradation products to accumulate.…”

Section: Commentmentioning

confidence: 99%

Acute Onset of Decreased Vision and Hearing Traced to Hemodialysis Treatment With Aged Dialyzers

Hutter

Kuehnert²,

Wallis³

et al. 2000

JAMA

View full text Add to dashboard Cite

show abstract

Section: Commentmentioning

confidence: 99%

Acute Onset of Decreased Vision and Hearing Traced to Hemodialysis Treatment With Aged Dialyzers

Hutter

Kuehnert²,

Wallis³

et al. 2000

JAMA

View full text Add to dashboard Cite

show abstract

“…It has been reported in the literature [16] that hydrolysis of CTA could cause higher membrane permeability and lower selectivity for the CTA RO membranes. The reason was the enlargement of mean pore size.…”

Section: Cta Hydrolysis and The Stability Of Pimmentioning

confidence: 99%

“…Therefore, it is reasonable to conclude that the decrease in feed solution pH played an important role in the decrease in indium permeability during the permeation experiment with 5 M HCl as the strip solution. The It has been reported in the literature [16] that hydrolysis of CTA could cause higher membrane permeability and lower selectivity for the CTA RO membranes. The reason was the enlargement of mean pore size.…”

Section: Cta Hydrolysis and The Stability Of Pimmentioning

confidence: 99%

Polymer Inclusion Membranes with Strip Dispersion

Wang

Hsien

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:The present work investigated the permeation of indium ions through a polymer inclusion membrane (PIM), prepared with cellulose triacetate (CTA) as the base polymer, tris(2-butoxyethyl) phosphate (TBEP) as the plasticizer and di-(2-ethylhexyl)phosphoric acid (D2EHPA) as the extractant. With 5 M HCl aqueous solution as the strip solution, we observed an initial indium permeability of 2.4 × 10 −4 m/min. However, the permeability decreases with time, dropping to about 3.4 × 10 −5 m/min after 200 min of operation. Evidence was obtained showing that hydrolysis of CTA occurred, causing a dramatic decrease in the feed pH (protons transported from strip to feed solutions) and a loss of extractant and plasticizer from the membrane, and then leading to the loss of indium permeability. To alleviate the problem of hydrolysis, we proposed an operation scheme called polymer inclusion membranes with strip dispersion: dispersing the strip solution in extractant-containing oil and then bringing the dispersion to contact with the polymer membrane. Since the strong acid was dispersed in oil, the membrane did not directly contact the strong acid at all times, and membrane hydrolysis was thus alleviated and the loss of indium permeability was effectively prevented. With the proposed scheme, a stable indium permeability of 2.5 × 10 −4 m/min was obtained during the whole time period of the permeation experiment.

show abstract

“…Na podstawie danych literaturowych [28,29] doty-cz¹cych w³aoeciwooeci fizykochemicznych trioctanu celulozy mo¿na s¹dziae, ¿e ograniczenie szybkooeci i efektywnooeci procesu rozdzia³u w obecnooeci jonów Cr(VI) mo¿e byae zwi¹zane z degradacj¹ struktury membrany inkluzyjnej z CTA.…”

Section: Wp³yw Stê¿enia Jonów Cr(vi) Na Efektywnooeae Transportu Jonó...unclassified

“…Rysunek 8b obrazuje polimerow¹ matrycê z CTA namoczon¹ w roztworze jonów Cr(VI), z widocznymi nieodwracalnymi zmianami morfologicznymi na jej powierzchni. Silnie utleniaj¹ce dzia³anie jonów Cr(VI) mo¿e powodowaae hydrolizê grup acetylowych lub utlenianie ³añcucha polimeru, a w konsekwencji jego rozrywanie [28,29]. Uznaje siê, ¿e g³ównym procesem przyczyniaj¹cym siê do degradacji CTA jest utlenianie ³añcucha polimeru, w wyniku którego nastêpuje zmniejszenie ciê¿aru cz¹steczkowego i wytrzyma³ooeci mechanicznej polimeru.…”

Section: Degradacja Polimerowej Membrany Inkluzyjnejunclassified

Polymer inclusion membrane based on cellulose triacetate (CTA) plasticized with 2-nitrophenyl octyl ether

2015

View full text Add to dashboard Cite

Przedstawiono budowê polimerowej membrany inkluzyjnej (PIM) z matryc¹ z trioctanu celulozy (CTA) oraz jej zastosowanie do wydzielania jonów chromu(III) z roztworów wodnych. Efektywnooeae transportu jonów Cr(III) w badanym uk³adzie by³a uwarunkowana stê¿eniem w membranie przenooenika jonów kwasu di(2-etyloheksylo)fosforowego (D2EHPA). Badany uk³ad pracuj¹cy stabilnie w procesach prowadzonych cyklicznie, mo¿e byae równie¿ wykorzystany do selektywnego wydzielania jonów Cr(III) z mieszaniny jonów Cr(III)/Cr(VI).

show abstract

Performance change formula of cellulose triacetate hollow fiber RO membranes due to oxidation and hydrolysis

Cited by 10 publications

References 8 publications

Acute Onset of Decreased Vision and Hearing Traced to Hemodialysis Treatment With Aged Dialyzers

Acute Onset of Decreased Vision and Hearing Traced to Hemodialysis Treatment With Aged Dialyzers

Polymer Inclusion Membranes with Strip Dispersion

Polymer inclusion membrane based on cellulose triacetate (CTA) plasticized with 2-nitrophenyl octyl ether

Contact Info

Product

Resources

About