نتایج جستجو برای: activated carbons

تعداد نتایج: 225396  

In this laboratory scale study, impregnated almond shell activated carbon was used as adsorbent to investigate its feasibility for nitrate adsorption from aqueous medium. The effects of activated carbon dosage and contact time have been examined in batch experiments. Experimental data show that impregnated activated carbons by Fe0, Fe2 (SO4)3, and FeSO4 were more effective than virgin almond ac...

Journal: :global journal of environmental science and management 0
n.t. abdel-ghani chemistry department, faculty of science, cairo university, cairo, egypt g.a. el-chaghaby regional center for food and feed, agricultural research center, giza, egypt f.s. helal science and technology centerof excellence, ministry of military production, cairo, egypt

in the present study, different activated carbons were prepared from carbonized african beech wood sawdust by potassium hydroxide activation. the activated carbons were characterized by brunauer–emmett–teller, scanning electron microscope, fourier transform infrared spectroscopy, and thermogravimetric analyzer. the phenol adsorption capacity of the prepared carbons was evaluated. the different ...

Journal: :international journal of environmental research 2015
s. salehin a. s. aburizaiza m. a. barakat

in this study, the recycling possibility of residual oil fly ash (rofa) towards preparing activated carbon and its application in environmental remediation through adsorbing cu (ii) and pb (ii) ions from aqueous solutions were investigated. activated carbons were prepared using two different physical activation methods such as under steam flow at 950 0c, and combined steam and co2 flow at 850 0...

In the present study, different activated carbons were prepared from carbonized African beech wood sawdust by potassium hydroxide activation. The activated carbons were characterized by brunauer–emmett–teller, scanning electron microscope, fourier transform infrared spectroscopy, and thermogravimetric analyzer. The phenol adsorption capacity of the prepared carbons was evaluated. The d...

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...

Journal: :journal of sciences islamic republic of iran 0

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...

Journal: :international journal of occupational hygiene 0
rohadin moradi-rad department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. leila omidi department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. hossein kakooei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. farideh golbabaei department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. hamed hassani department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran. rezvan abedin-loo department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran.

the modeling of kinetic and isotherm curves acquired in adsorption of polycyclic aromatic hydrocarbons (pahs) as a model compound (phenanthrene) on activated carbons in the organic solvent. all the runs were carried out in a batch system at atmospheric pressure, process temperature of 24±2°c, and using the 100 ml phenanthrene in cyclohexan. this experimental work was mainly focused on the study...

Journal: :journal of agricultural science and technology 2015
r. rostamian m. heidarpour s. f. mousavi m. afyuni

biochar and activated carbon, as carbon-rich porous materials, have wide environmental applications. in the present research, rice husk (rh) was used for preparation of biochar at 400, 600, and 800 °c under simple pyrolysis, physically-activated carbon with water steam, chemically-activated carbon with potassium hydroxide (koh), and physiochemically-activated carbon with koh and steam. physical...

Journal: :Bioresource technology 2003
R R Bansode J N Losso W E Marshall R M Rao R J Portier

The objective of this research was to determine the effectiveness of using pecan and almond shell-based granular activated carbons (GACs) in the adsorption of volatile organic compounds (VOCs) of health concern and known toxic compounds (such as bromo-dichloromethane, benzene, carbon tetrachloride, 1,1,1-trichloromethane, chloroform, and 1,1-dichloromethane) compared to the adsorption efficienc...

2012
Ivo Safarik Katerina Horska Kristyna Pospiskova Mirka Safarikova

Activated carbons are very important materials used e.g. as adsorbents, catalysts and catalyst supports. The application potential of activated carbons can be increased by their magnetic modification. Magnetically responsive activated carbons can be easily separated from complex systems or targeted to a desired place using an external magnetic field. This short review summarizes typical procedu...

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