title: Removal of 2,4-dichlorophenol from aqueous solution by static-air-activated carbon fibers.
abstract: Static-air-activated carbon fibers (ACFs) with lotus-root-like axially porous structure were used to adsorb 2,4-dichlorophenol (2,4-DCP) from aqueous solution. The adsorption isotherm was evaluated in the pH range 3.0-11.0. Results indicated that both Langmuir and Redlich-Peterson adsorption isotherms were appropriate for describing the adsorption characteristics of 2,4-DCP at various pH values and that lower pH values were favorable for adsorption. The adsorption of 2,4-DCP was controlled by the synergetic effects of pi-pi interaction and electrostatic attraction, and the former was dominant. Breakthrough curve results showed that the 2,4-DCP removal efficiency increased with an increase in the empty-bed contact time (EBCT). An EBCT of 0.660 min was sufficient for the adsorption of 2,4-DCP onto ACF, indicating a high adsorption rate. Desorption experiment results revealed that the ACF saturated with 2,4-DCP could be regenerated effectively by a 0.001 M NaOH solution.
authors.affiliation: Department of Chemistry, University of Science & Technology of China, Hefei 230026, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Wang
authors.forename: Yong-Zhen
authors.initials: YZ
authors.lastname: Chen
authors.forename: Hui-Min
authors.initials: HM
authors.lastname: Feng
authors.forename: Shu-Juan
authors.initials: SJ
authors.lastname: Zhang
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu