Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Activated Carbon

Adsorptive Desulfurization of Gas Oil Over Cu2O/AC, ZnO/AC and NiO/AC Adsorbents

S.H. Ammar; S.A. Jaffar

Engineering and Technology Journal, 2017, Volume 35, Issue 8, Pages 856-863

In the present work, Iraqi gasoil fraction was treated by using three prepared metal-impregnated activated carbon adsorbents for sulfur removal using adsorptive desulfurization method. In the first experimental section, commercial activated carbon was loaded individually with copper, zinc and nickel oxides and reaches the form of Cu2O, ZnO and NiO respectively. XRD, BET, surface area and metal content were determined for the three prepared adsorbents. The three prepared metal loaded adsorbents were tested for sulfur removal from Iraqi gasoil fuel via batch mode and continuous mode. In continuous operation, fixed bed adsorber packed individually with the three prepared adsorbents was used and breakthrough curves were generated. The results of the present study indicate that the desulfurization enhanced when metals zinc, copper and nickel were loaded onto activated carbon surface. Sulfur adsorption uptake by the three adsorbents followed the order Cu2O > ZnO > NiO (the highest desulfurization percent obtained via continuous mode for Cu2O, ZnO and NiO were 69.7%, 67.47% and 60.7% respectively). Moreover, it was exhibited that for batch mode experiments by increasing the adsorbent's concentration enhanced the sulfur removal by a noticeable amount. Whilst for the continuous mode experiments, it dealt mainly with contact time; thereby the maximum desulfurization percentage was obtained at the first 15 minutes.

Influence of Operating Conditions on Adsorption of Lead (II) Ions From Contaminated Water Using Different Adsorbents

Areej Dalf Abbas

Engineering and Technology Journal, 2012, Volume 30, Issue 6, Pages 991-1000

Removal of heavy metals from water and wastewater has received a great deal of attention. Adsorption is one of the most technologies being used for treatment of polluted water. This study records lab scale experiments to test efficiency of activated carbon as an adsorbent and comparing it with low-cost naturally occurring materials (sand & egg shells) in removing lead ions from wastewater. The adsorption of lead ions from solutions containing different initial lead concentrations (100, 150 and 200 ppm pb as lead nitrate) using different particle
size (140, 300 and 500 ìm) and different doses of activated carbon, sand and egg shells at different pH (4, 7 and 10) was examined. Also the metal concentration retained in the adsorbent phase (mg/g) was calculated. This method of heavy metals removal proved highly effective as removal efficiency increased with increasing adsorbent dose while it decreased with increasing metals concentration. The results revealed that of the studied adsorbents, the activated carbon showed
the highest adsorption capacity and the maximum adsorption can be obtained by using particle size of 140 ìm in neutral media (pH 7). This technique might be successfully used for the removal of lead ions from liquid industrial wastes and wastewater.

The Study of Typical Conditions to Remove Co from Water by Adsorption by Using Activated Carbon

Shaymaa H. Khazaal

Engineering and Technology Journal, 2011, Volume 29, Issue 9, Pages 1691-1700

The effective removal of heavy metal ions from water is among the most
important issues for many industrialized countries. The present work has been
carried out to study the adsorption of cobalt [II] ion using activated carbon.
The removal of cobalt ions was investigated in batch conditions. The influence of
initial cobalt ion concentration, pH, adsorbent dose, adsorbent practical size;
contact time and shaking rate were studied at room temperature. The analysis of
residual Co [II] ions was determined using Atomic Absorption Spectrophotometer
GBC 933 plus. The results showed that the percentage adsorption of activated
carbon increases with time and that maximum adsorption was obtained within the
first 60 minutes of the process, and 300 rpm shaking rate.
The experiments showed that the maximum % adsorption of 100% was obtained
at adsorbent dose=0.4 gm, pH=13, particle size= (0-75) μm and 10 mg/L of initial
concentration of cobalt. These results indicate that activated carbon has potential
for removing cobalt ions from water.

Preparation Activated Carbon of From Iraqi Reed

Najat J. Saleh; Mohammed I. Ismaeel; Raheek. I. Ibrahim; Mummtaz A. Zablouk; Ali amer

Engineering and Technology Journal, 2008, Volume 26, Issue 3, Pages 291-304

In this work activated carbon (AC) was successfully prepared from local
raw material namely Iraqi Reed .This source is cheap and available and in this
work AC is prepared from it for the first time. A chemical method using zinc
chloride was used in the activation process. The proper carbonization temperature
was found to be 450 oC and the time required for carbonization was one hour. The
adsorption capacity for acetone of the prepared AC was measured and found to be
15.6%. Some important properties were also studied such as: apparent density
(0.451 g/cm3), ash content (9.4%), moisture content (4.8%). The x- ray
diffraction also showed that AC exhibited a poorly crystalline structure, with a
little amount of silica and graphite.
Decolorization capacity (DC %) of AC on: (a) Caramel dye solution (b) Potassium
permanganate solution, were studied. The effect of quantity Of AC and contact
time was investigated using UV- spectrophotometer. It was found that
decolorization capacity DC% of KMnO4 solution (93%) and it was better adsorbed
within one hour, while DC% of caramel dye solution was (87%) and it was a better
adsorbent for the color within two hours. It is concluded that AC prepared in this
work has a good specification compared with standard sample thus it is suitable for
industrial uses.