نتایج جستجو برای: flux and rejection

تعداد نتایج: 16845373  

2017
Takahiro Fujioka Long D. Nghiem

The use of heat treatment to improve solute rejection and fouling resistance of a polyamide reverse osmosis (RO) membrane was investigated in this study. Heat treatment was carried out by immersing the membrane samples in Milli-Q water at 70 degrees celcius for a specific duration. Heat treatment reduced the pure water permeability from 4.1 to 2.8 L/m2 bar but improved conductivity rejection fr...

Journal: :Jurnal Rekayasa Kimia & Lingkungan 2021

Interfacial polymerization of polyamide was conducted using hydrophobic and hydrophilic membrane support. The effects monomer concentration were investigated, the resulting thin-film composite membranes tested for their performance in dye removal different flow configurations. results showed that a dense layer successfully formed on support, while with very loose structure became smoother more ...

Journal: :Sustainable Environment Research 2021

Abstract The vast amount of not-recycled polyethylene terephthalate (PET) bottle waste is a serious threat to the environment. In order utilize waste, PET ultrafiltration membranes were prepared using as raw material by phase inversion technique. Low molecular weight glycol (PEG 400) was used additive for membranes. resin also membrane compare properties from and those resin. that showed simila...

Journal: :nursing and midwifery studies 0
khodayar oshvandi research center for maternal and child care, hamadan university of medical sciences, hamadan, ir iran rasol kavyannejad nursing and midwifery school, hamadan university of medical sciences, hamadan, ir iran sayed reza borzuo research center for maternal and child care, hamadan university of medical sciences, hamadan, ir iran; research center for maternal and child care, hamadan university of medical sciences, hamadan, ir iran. tel: +98-9188117729 mahmoud gholyaf department of nephrology, school of medicine, hamadan university of medical sciences, hamadan, ir iran

results the mean kt/v was 1.27 ± 0.28 in high-flux and 1.10 ± 0.32 in low-flux membrane which, these differences were statistically significant (p = 0.017). the mean of urr was 0.65 ± 0.09 in high-flux and 0.61 ± 0.14 in low-flux membrane, which these differences were not statistically significant (p = 0.221). patients and methods forty hemodialysis patients participated in this cross-over clin...

In this study, polymer composite membranes comprising carbon nanotube (CNT), polysulfone (PSF) and polyvinyl alcohol (PVA) were synthesized via the phase inversion method and used to remove phenol from the phenol-containing wastewater. The fabricated membranes were reinforced with the functionalized carbon nanotubes (fCNTs) and coated with PVA to enhance their mechanical strength and anti-fouli...

2001
HONGJOO LEE GARY AMY JAEWEON CHO YEOMIN YOON SEUNG-HYEON MOON

One of the most common problems encountered in water treatment applications of membranes is fouling. Natural organic matter (NOM) represents a particularly problematic foulant. Membranes may be fouled by relatively hydrophilic and/or hydrophobic NOM components, depending on NOM characteristics, membrane properties, and operating conditions. To maximize flux recovery for an NOMfouled ultrafiltra...

Journal: :iranian journal of immunology 0
mahboob lessan-pezeshki department of immunology, tehran university of medical sciences, tehran, iran ali akbar amirzargar department of immunology, tehran university of medical sciences, tehran, iran nooshin golabi department of immunology, tehran university of medical sciences, tehran, iran mohammadreza khatami department of immunology, tehran university of medical sciences, tehran, iran behzad einollahi department of immunology, tehran university of medical sciences, tehran, iran vahid pourfarziani department of immunology, tehran university of medical sciences, tehran, iran farideh khosravi

background: monitoring of phenotypic characteristics of t-lymphocytes in peripheral blood is commonly performed to give the clinical parameters in the management of kidney transplant recipients.   objective: to predict rejection in renal transplantation by immune parameters. methods: 16 non-diabetic kidney transplant candidates (4 females and 12 males, age = 20-65 yr, first time transplant) wer...

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