نتایج جستجو برای: pseudo second order

تعداد نتایج: 1443601  

Journal: :physical chemistry research 0
sayeydmosatfa habibi-khorassani department of chemistry, university of sistan and baluchestan, p.o.box 98135-674, zahedan, iran mehdi shahraki department of chemistry faculty of science university of sistan and baluchestan zahedan, iran ali ebraiimi department of chemistry faculty of science university of sistan and baluchestan zahedan, iran sayyede shadfar pourpanah department of chemistry faculty of science university of sistan and baluchestan zahedan, iran

the kinetics and mechanism of the reaction between benzaldehyde 1, malononitrile 2 and dimedone 3 in a mixture of ethanol and water as solvents in the presence of fructose as a biodegradable catalyst has been studied by the spectroscopic method (uv-vis spectrophotometry method). the influence of various parameters (temperature, solvent and concentration) was studied on the reaction by means of ...

Hossein Faghihian, Mehri Yahyaie

In this research, adsorption of dibenzothiophene (DBT) as a model of sulfur containing material has been studied by Pb exchanged Y-zeolite under different experimental conditions. The adsorption was kinetically fast and high adsorption capacity was obtained. The equilibrium adsorption data were analyzed using Langmuir and Freunlich isotherm models. The corresponding parameters and correlation c...

In the present research work, the kinetics of sunflower oil transesterification reaction in the presence of Ba-Sr/ZSM-5 nanocatalyst which prepared using incipient wetness impregnation method was investigated. The 10wt.%Ba-Sr/ZSM-5 (Sr/Ba=3/2) nanocatalyst was calcined at 600 °C for 6 h with a heating rate of 3 ºC/min. The experimental conditions were the methanol/oil 9/1molar ratio, reaction t...

Ali Vatani Mehdi Mehrpooya, Sayed Mohammad Ali Moosavian

A type of novel hypercross-linked fiber adsorbent was obtained by sulfonation and cross-linking reaction of polypropylene fiber grafted styrene-divinylbenzene. The aim of the fiber sulfonation and cross-linking method was to prepare rigid three dimensional networks in the entire fiber and change the ion exchange capacity of fiber. The hypercross-linked fiber adsorbent possesses a principall...

Li Dongguang Zhang Yanli,

A type of novel hypercross-linked fiber adsorbent was obtained by sulfonation and cross-linking reaction of polypropylene fiber grafted styrene-divinylbenzene. The aim of the fiber sulfonation and cross-linking method was to prepare rigid three dimensional networks in the entire fiber and change the ion exchange capacity of fiber. The hypercross-linked fiber adsorbent possesses a principall...

Background: Synthetic dyes are serious pollutants and wide ranges of methods have been employed for their removal from aquatic systems. We studied the adsorption of "Nile blue A" (NBA), an anionic dye, from aqueous solution by oxidized multi-walled carbon nanotubes (MWCNTs). Methods: Scanning electron microscope and Fourier transform infrared spectroscopy were used to characterize ...

Journal: :international journal of environmental research 2010
c. smaranda m. gavrilescu d. bulgariu

the aim of this study was to investigate the congo red sorption on soil from the region of iasi (ne of romania). the effects of contact time, temperature, sorbent dose and initial dye concentration on soi sorption were investigated. the results show that the amount adsorbed of congo red on soil increase with increasing dye concentration, temperature and contact time. the experimental data were ...

Journal: :iranian journal of health sciences 0
soheil sobhanardakani department of the environment, school of basic sciences, hamedan branch, islamic azad university, hamedan, iran raziyeh zandipak young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran

background and purpose:the presence of dyes in wastewaters may cause serious problems for the environment because of their high toxicity to aquatic organisms and unfavorable aesthetical impact. in the present study, multi-walled carbon nanotubes (mwcnts) were used for removal of anionic dyes direct blue 106 (db106) and acid green 25 (ag25), from water samples. materials and methods:mwcnts were ...

Journal: :iranian journal of toxicology 0
مهرداد چراغی mehrdad cheraghi department of environment, hamedan branch, islamic azad university, hamedan, iran. سهیل سبحان اردکانی soheil sobhanardakani department of environment, hamedan branch, islamic azad university, hamedan, iran. رضیه زندی پاک raziyeh zandipak msc of environmental sciences, young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran. بهاره لرستانی bahareh lorestani department of environment, hamedan branch, islamic azad university, hamedan, iran. هاجر مریخ پور hajar merrikhpour department of chemistry, university of sayyed jamaleddin asadabadi, asadabad, iran.

background: the presence of lead in natural waters has become an important issue around the world. lead has been identified as a highly toxic metal that can cause severe environmental and public health problems and its decontamination is of utmost importance. the aim of this work was to evaluate the adsorption of lead (pb(ii)) on waste tea leaves as a cheap purification method. methods: in this...

Journal: :journal of health sciences and surveillance system 0
mohammad ali baghapour department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran babak djahed department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran mojdeh ranjbar department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran

background and objectives: activated carbon is an adsorbent which is mostly employed in order to remove dye from aqueous solutions; however, commercial activated carbon is expensive and this is considered as an obstacle for its usage. therefore, the present study aimed to use waste paper as an inexpensive precursor to produce activated carbon. materials and methods: in the present study, koh wa...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید