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...

the removal ofxylenol orange from aqueous solution onto the coal ash was investigated at room temperature. the results show that the adsorption capacity of xylenol orange increased as the adsorption time increased and then equilibrium established after 30 min adsorption time. the results obtained revealed that the coal ash removed about 80 % of xylenol orange from the aqueous solution within 40...

adsorption of p-nitrophenol by three different activated carbons (f100, s.e.i. and b.d.h.) was carried out at 301 k and at controlled ph conditions. two different adsorption models (langmuir model and freundlich model) were studied and compared. the adsorption capacity of the carbons depends on the point of zero charge (pzc) and surface area of the carbons. adsorption of the solute at higher ph...

In this study, modeling of hydrogen, nitrogen, carbon monoxide, methane and carbon dioxide sorption on UTSA-16 framework extrudates in the pressure swing adsorption process was carried out. The pure gas adsorption of these gases at the pressure range (0 to 80) bars at (298, 313, and 338) K have also been measured in a fixed bed. Langmuir, Toth, Sips, UNILAN, Virial and Dubinin-Astakhov adsorpti...

In this study, carbon was made from walnut wood as a low-cost and non-toxicnatural adsorbent.Walnut wood(WC), were successfully synthesized by an in chemical vapor deposition methodthen characterized using FT-IR techniques and used for the removal of trihalomethanes(THMs) from aqueous solution. The trihalomethanes(THMs) removal by the developed adsorbent was investigated using batch adsorption ...

Adsorption of gold cyanide on three types of Activated Carbons (ACs) has been investigated in batch and column adsorption conditions. Applied ACs have been derived from different crops precursors i.e., coconut shell (CAC), peach stone (PAC), and walnut shell (WAC). As peach stone and walnut shells are abundant agricultural residues in Iran, the activated carbons produced from these precurso...

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 ...

introduction: colored compounds which often are toxic and carcinogen is one of the environmental pollutants. these pollutants should be removed prior than discharge to the environment. the aim of this study was the evaluation of maize tassel powder efficiency for the removal of reactive red 198 dye from synthetic textile wastewater. materials & methods: this experimental study was performed in ...

the adsorption of lead (11) and copper (11) in a fixed bed column using activated carbonprepared from nipa palm nut was investigated. thomas model and yoon and nelson kinetic models were used to analyze the column performance. the rate constant for thomas model increased with increase in flow rate and initial ion concentration but remained constant at varying bed height. adsorption capacity for...

in this study, the removal of as (v) from water resources by using aluminum-coated pumice as a new adsorbent was assessed. the features of the adsorbent coating layer were observed by x-ray diffraction (xrd) and scanning electron microscopy (sem).the effects of various parameters such as adsorbent doses, ph, contact time, arsenate initial concentration and interfering ions in arsenic adsorpt...