Removal of phenol by powdered activated carbon prepared from coal gasification tar residue.
Coal gasification tar residue (CGTR) is a kind of environmentally hazardous byproduct generated in fixed-bed coal gasification process. The CGTR extracted by ethyl acetate was used to prepare powdered activated carbon (PAC), which is applied later for adsorption of phenol. The results showed that the PAC prepared under optimum conditions had enormous mesoporous structure, and the iodine number reached 2030.11 mg/g, with a specific surface area of 1981 m2/g and a total pore volume of 0.92 ml/g. Especially, without loading other substances, the PAC, having a strong magnetism, can be easily separated after it adsorbs phenol. The adsorption of phenol by PAC was studied as functions of contact time, temperature, PAC dosage, solution concentration and pH. The results showed a fast adsorption speed and a high adsorption capacity of PAC. The adsorption process was exothermic and conformed to the Freundlich models. The adsorption kinetics fitted better to the pseudo-second-order model. These results show that CGTR can be used as a potential adsorbent of phenols in wastewater.
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Xiong-Lei
XL
Wang
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Jun
J
Shen
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Yan-Xia
YX
Niu
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Yu-Gao
YG
Wang
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Gang
G
Liu
a College of Chemistry and Chemical Engineering , Taiyuan University of Technology , Shanxi , People's Republic of China.
Qing-Tao
QT
Sheng
D000327:Adsorption; D002244:Carbon; D002606:Charcoal; D003031:Coal; D003033:Coal Tar; D015386:Hazardous Substances; D007700:Kinetics; D019800:Phenol; D010636:Phenols; D018505:Waste Management
D003031:Coal; D015386:Hazardous Substances; D010636:Phenols; D002606:Charcoal; D019800:Phenol; D002244:Carbon; D003033:Coal Tar
Coal gasification tar residue; adsorption; phenol; powdered activated carbon; wastewater