title: Modification of bio-char derived from fast pyrolysis of biomass and its application in removal of tetracycline from aqueous solution.
abstract: In this work, bio-char, a mass productive by-product of biomass fast pyrolysis, was adopted as an adsorbent to remove tetracycline (TC) from aqueous solution. To enhance the adsorption capacity, a simple modification of bio-char with acid and alkali was carried out. Bio-char samples were characterized by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption isotherm. The results show that the alkali treated bio-char possesses larger surface area than those of raw and acid treated bio-chars, and accordingly exhibits a more excellent adsorption performance (58.8 mg/g) than the other two bio-chars and other adsorbents reported previously. The graphite-like structure of bio-char facilitates the formation of π-π interactions between ring structure in tetracycline molecule and graphite-like sheets. The surface area showed significant effects on TC adsorption as well as O-containing functional groups, whereas the initial pH of solution has small effects on TC adsorption under the experimental conditions.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Pei
authors.initials: P
authors.lastname: Liu
authors.forename: Wu-Jun
authors.initials: WJ
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Jie-Jie
authors.initials: JJ
authors.lastname: Chen
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Li
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
mesh_terms: D000327:Adsorption; D018533:Biomass; D002606:Charcoal / Q000138:chemical synthesis* / Q000378:metabolism*; D006358:Hot Temperature; D009584:Nitrogen / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared; D013752:Tetracycline / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; C540010:biochar; D002606:Charcoal; D013752:Tetracycline; D009584:Nitrogen