نتایج جستجو برای: dual stage nanofiltration

تعداد نتایج: 507808  

Journal: :Environmental science & technology 2004
Long D Nghiem Andrea I Schäfer Menachem Elimelech

The removal mechanisms of four natural steroid hormones-estradiol, estrone, testosterone, and progesterone-by nanofiltration (NF) membranes were investigated. Two nanofiltration membranes with quite different permeabilities and salt retention characteristics were utilized. To better understand hormone removal mechanisms, the membrane average pore size was determined from retention data of inert...

A.Nouri, H. Saghafian, Sh.Kheirandish,

Abstract: In the current work, the strain hardening behavior of dual-phase steels with different silicon content (0.34- 2.26 Wt. %) was examined using the modified Crussard-Jaoul analysis. It was shown that these dual-phase steels deform in two stages over a uniform strain range. Each stage exhibited a different strain hardening exponent varying with silicon content. At the first stage, work...

پایان نامه :دانشگاه آزاد اسلامی واحد علوم پزشکی تهران - دانشکده پزشکی 1390

هدف: این مطالعه به منظور بررسی ارتباط میان علائم بیماران و stage کارسینوم معده در بیماران مراجعه کننده به بیمارستان امیرالمومنین تهران طی سالهای 90-89 انجام شده است. روش مطالعه: در این مطالعه مقطعی، 30 فرد مبتلا به سرطان معده بررسی شدند که افراد از نظر staging بررسی شده و stage آنها ثبت گردید و در نهایت فراوانی علائم بالینی مختلف در stageهای مختلف مورد مقایسه قرار گرفت. یافته ها: 7/6 درصد در ...

Journal: :Chemical communications 2015
Yanbo Li Lik H Wee Alexander Volodin Johan A Martens Ivo F J Vankelecom

Porous polymer supported continuous ZIF-8 membranes were prepared via an interfacial synthesis method. Membranes with only one synthesis cycle showed excellent performance in the nanofiltration range.

2005
Arlindo Caniço Gomes Isolina Cabral Gonçalves Maria Norberta de Pinho

The influence of osmotic pressure and solute adsorption on permeate flux during nanofiltration (NF) of a wool textile dye solution was investigated. Solutions of C.I. Acid Orange 7 with concentrations ranging from 2 to 2000 mg/l were subjected to nanofiltration with a NF 45 membrane. An increase of flux decline with dye concentration was observed. The resistance-in-series model gives evidence t...

Journal: :Journal of environmental management 2012
R Sobhani R McVicker C Spangenberg D Rosso

In regions characterized by water scarcity, such as coastal Southern California, groundwater containing chromophoric dissolved organic matter is a viable source of water supply. In the coastal aquifer of Orange County in California, seawater intrusion driven by coastal groundwater pumping increased the concentration of bromide in extracted groundwater from 0.4 mg l⁻¹ in 2000 to over 0.8 mg l⁻¹ ...

امام جمعه, محمد مهدی, تاری, کامران, حاج عظیمان, یگانه, صفری واریانی, علی, علیجانی, محمد حسین,

Background and purpose: Fluoride is a major mineral pollutant in groundwater. Long-term exposure to high concentration of fluoride in drinking water causes dental fluorosis, skeletal and non-skeletal fluorosis. Therefore, highly efficient water treatment that could lower the concentration of fluoride in groundwater is a challenge. This study aimed at evaluating the efficiency of Nanofiltration ...

Journal: :Chemical communications 2010
Sheung So Ludmila G Peeva Edward W Tate Robin J Leatherbarrow Andrew G Livingston

This communication reports a new technology platform that advantageously combines organic solvent nanofiltration (a newly emerging technology capable of molecular separations in organic solvents) with solution phase peptide synthesis-Membrane Enhanced Peptide Synthesis (MEPS).

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