Adsorption of bisphenol A from aqueous solution onto activated carbons with different modification treatments.
Two commercial carbons (W20 and F20) had been selectively modified with nitric acid and thermal treatment under a flow of N(2) in present study to adsorb bisphenol A from aqueous solution. The results indicated that the experimental data were well described with pseudo-second-order kinetic model. W20 and its thermal modified sample (W20N) represented a better adsorption capacity, and the equilibrium adsorption amounts reached 382.12 and 432.34 mg/g, respectively. Further, effects of temperature, pH and ionic strength on bisphenol A adsorption onto W20 and W20N had been examined. It was found that the adsorbed amount of bisphenol A decreased with the increase of temperature from 288 to 318 K and changed little with the increase of pH from 5.0 to 9.0. At pH 11.0, the two activated carbons represented the weakest adsorption capacity. The adsorption capacities of bisphenol A onto W20 and W20N first decreased and then increased with the increasing of ionic strength.
Liu
Guifang
G
School of Civil Engineering, Harbin Engineering University, Harbin, PR China.
Ma
Jun
J
Li
Xuchun
X
Qin
Qingdong
Q
D000327:Adsorption; D001559:Benzhydryl Compounds; D002606:Charcoal / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D017942:Nitric Acid; D009994:Osmolar Concentration; D010636:Phenols / Q000302:isolation & purification*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D000098826:Bisphenol A Compounds
D001559:Benzhydryl Compounds; D002606:Charcoal; D017942:Nitric Acid; D010636:Phenols; D012996:Solutions; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds