نتایج جستجو برای: sodium adsorption ratio

تعداد نتایج: 726538  

Journal: :desert 2008
m. jafari m. souri h. azarnivand m. makhdom v. etemad

soil salinity is one of the problems threatening agricultural lands. parts of this phenomenon are related to geologic formations and saltpans, while some major factors are resulted from irrelevant agricultural activities, issue of irrigation, and improper cultivation systems which lead to increase in soil salinity. to avoid such consequences that would end up with ecosystem degradation, suitabl...

In this research, Activated Carbon (AC) was modified using a sodium hydroxide solution for CO2 adsorption. Adsorption experiments were carried out in a batch reactor at a temperature range of 20-80°C and a pressure range of 2-10 bars to investigate kinetic, isotherm, and thermodynamic of the CO2 adsorption process. Activated carbon was modified with NaOH solution conce...

Journal: :Catalysts 2023

Although Fe-based catalysts have made significant progress in Fischer–Tropsch synthesis, the effect of residual sodium on structural properties and catalytic performance has been controversial. Herein, we report positive role FeAlNa for olefins synthesis from syngas. Meanwhile, as-prepared were characterized by multiple characterization technique to reveal properties. The results revealed that ...

2013
Jin Zhang

In order to improve adsorption capacity of granular activated carbon (GAC), potassium permanganate was used to react with GAC to change the surface properties and improve the adsorption capacity of GAC. By batch experiments, improvement of adsorption capacity of potassium permanganate modified GAC (GACM) was studied. The influence of adsorption time, temperature, ratio of phenol with GAC/GACM, ...

ژورنال: سلامت و محیط زیست 2011
اسلامی, اکبر, ملکی, افشین,

Backgrounds and Objectives:Water contamination with arsenic has been recognized as a serious problem and its epidemiological problems to human health have been reported. The objective of this study was to explore the possibility modified wheat straw using sodium bicarbonate for removing arsenic from aqueous solution.Materials and Methods: Adsorption process was accomplished in a laboratory-scal...

2017
Qing Wang Valentina Prigiobbe Chun Huh Steven L. Bryant Dongsheng Wen

In this paper, we present a study on the adsorption of calcium (Ca2+) onto polyacrylic acid-functionalized iron-oxide magnetic nanoparticles (PAA-MNPs) to gain an insight into the adsorption behavior of alkaline earth elements at conditions typical of produced water from hydraulic fracturing. An aqueous co-precipitation method was employed to fabricate iron oxide magnetic nanoparticles, whose s...

2017
Toshiyuki Iwahori Katsuyuki Miura Hirotsugu Ueshima

Pathogenetic studies have demonstrated that the interdependency of sodium and potassium affects blood pressure. Emerging evidences on the sodium-to-potassium ratio show benefits for a reduction in sodium and an increase in potassium compared to sodium and potassium separately. As presently there is no known review, this article examined the practical use of the sodium-to-potassium ratio in dail...

Eghbal Sahraei Mohammad Amin Safarzadeh Seyyed Alireza Tabatabaei Nejad,

Fractional flow analysis confirms the advantages of surfactant alternative gas injection (SAG) in enhanced oil recovery, but an adsorption phenomenon that has been affected by several factors, weakens the effectiveness of SAG injection. In this study, the effects of sacrificial agent, gas phase, and surfactant concentration on adsorption density on silica mineral were investigated by static and...

2017
Matthew J. Kayatin Jay L. Perry

Traditional gas-phase trace contaminant control adsorption process flow is constrained as required to maintain high contaminant single-pass adsorption efficiency. Specifically, the bed superficial velocity is controlled to limit the adsorption mass-transfer zone length relative to the physical adsorption bed; this is aided by traditional high-aspect ratio bed design. Through operation in this m...

Journal: :physical chemistry research 0
heydar ali shafiei gol university of sistan and baluchestan mehdi noura university of sistan and baluchestan, zahedan, iran.

the storage capacity of hydrogen on na-decorated born nitride nanotubes (bnnts) is investigated by using density functional theory within quantum espresso and gaussian 09. the results obtained predict that a single na atom tends to occupy above the central region of the hexagonal rings in (5,0) and (3,3) bnnt structures with a binding energy of -2.67 and -4.28 ev/na-atom respectively. when a si...

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