TY - JOUR
T1 - Ciprofloxacin adsorption from aqueous solution onto chemically prepared carbon from date palm leaflets
AU - El-Shafey, El Said Ibrahim
AU - Al-Lawati, Haider
AU - Al-Sumri, Asmaa Soliman
PY - 2012/9
Y1 - 2012/9
N2 - A chemically prepared carbon was synthesized from date palm leaflets via sulphuric acid carbonization at 160°C. Adsorption of ciprofloxacin (CIP) from aqueous solution was investigated in terms of time, pH, concentration, temperature and adsorbent status (wet and dry). The equilibrium time was found to be 48 hr. The adsorption rate was enhanced by raising the temperature for both adsorbents, with adsorption data fitting a pseudo second-order model well. The activation energy, Ea, was found to be 17 kJ/mol, indicating a diffusion-controlled, physical adsorption process. The maximum adsorption was found at initial pH 6. The wet adsorbent showed faster removal with higher uptake than the dry adsorbent, with increased performance as temperature increased (25-45°C). The equilibrium data were found to fit the Langmuir model better than the Freundlich model. The thermodynamic parameters showed that the adsorption process is spontaneous and endothermic. The adsorption mechanism is mainly related to cation exchange and hydrogen bonding.
AB - A chemically prepared carbon was synthesized from date palm leaflets via sulphuric acid carbonization at 160°C. Adsorption of ciprofloxacin (CIP) from aqueous solution was investigated in terms of time, pH, concentration, temperature and adsorbent status (wet and dry). The equilibrium time was found to be 48 hr. The adsorption rate was enhanced by raising the temperature for both adsorbents, with adsorption data fitting a pseudo second-order model well. The activation energy, Ea, was found to be 17 kJ/mol, indicating a diffusion-controlled, physical adsorption process. The maximum adsorption was found at initial pH 6. The wet adsorbent showed faster removal with higher uptake than the dry adsorbent, with increased performance as temperature increased (25-45°C). The equilibrium data were found to fit the Langmuir model better than the Freundlich model. The thermodynamic parameters showed that the adsorption process is spontaneous and endothermic. The adsorption mechanism is mainly related to cation exchange and hydrogen bonding.
KW - Adsorption
KW - Carbon
KW - Ciprofloxacin
KW - Palm leaflets
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U2 - 10.1016/S1001-0742(11)60949-2
DO - 10.1016/S1001-0742(11)60949-2
M3 - Article
C2 - 23520864
AN - SCOPUS:84866329575
SN - 1001-0742
VL - 24
SP - 1579
EP - 1586
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
IS - 9
ER -