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Adsorption of some organic phenolic compounds using activated carbon from cypress products

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Fri, 2014-03-14 23:25 — Ismail Warad
Journal Title, Volume, Page: 
Journal of Chemical and Pharmaceutical Research, 2014, 6(2):713-723
Year of Publication: 
2014
Link: 
http://jocpr.com/vol6-iss2-2014/JCPR-2014-6-2-713-723.pdf
Preferred Abstract (Original): 
Phenolic organic compounds are extremely highly generated from many resources which disposed to sewerage
system without treatments that increase the risk of contaminating water resources. This study is focused on
preparing and studying the properties of activated carbon produced from cypress fruit by chemically activation
using phosphoric acid (H3PO4) as an activating agent. The activated carbon used to adsorb p-nitrophenol (PNP)
from the aqueous solution. Result show that the activated carbon produces from cypress fruit gives good percentage
yields which reach up to 51.8%. Surface area determined by iodine number showed 524.1m2/g. The adsorptive
properties of CFAC were investigated in terms of adsorbent dose, PNP concentration, pH, and temperature and
contact time in a batch system. Results indicate that the optimum percent of PNP removal 90.9 % when adsorbent
dosage 0.3g and PNP concentration 80mg/L and percentage removal of PNP increase when the concentration of
PNP decrease which maximum percentage removal reach 93.2% when PNP concentration 20mg/L and 0.1g CFAC.
The effect of temperature on adsorption by CFAC has also been investigated in the range of 15-45 °C. The results
indicate that the temperature slightly affected effectiveness of CFAC adsorption. The results showed that
equilibrium time for PNP adsorption is 150min, but most the adsorption attained within the first ten minute. Results
investigate that the produced cypress fruit activated carbon (CFAC) adsorption equilibrium is represented by both
Frenundlich and Langmuir equilibrium model, but Langmuir model describe very well the adsorption. The main
properties of Langmuir equation can be expressed in term of separation factor, RL. The RL equal 0.053 that indicate
the adsorption favorable.
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