title: Adsorption and removal of tetracycline antibiotics from aqueous solution by graphene oxide.
abstract: Significant concerns have been raised over pollution of antibiotics including tetracyclines in aquatic environments in recent years. Graphene oxide (GO) is a potential effective absorbent for tetracycline antibiotics and can be used to remove them from aqueous solution. Tetracycline strongly deposited on the GO surface via π-π interaction and cation-π bonding. The adsorption isotherm fits Langmuir and Temkin models well, and the theoretical maximum of adsorption capacity calculated by Langmuir model is 313 mg g(-1), which is approximately in a close agreement with the measured data. The kinetics of adsorption fits pseudo-second-order model perfectly, and it has a better rate constant of sorption (k), 0.065 g mg(-1) h(-1), than other adsorbents. The adsorption capacities of tetracycline on GO decreased with the increase in pH or Na(+) concentration. The adsorption isotherms of oxytetracycline and doxycycline on GO were discussed and compared.
authors.affiliation: Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Junjie
authors.initials: J
authors.lastname: Hu
authors.forename: Syed Mazhar
authors.initials: SM
authors.lastname: Shah
authors.forename: Xingguang
authors.initials: X
authors.lastname: Su
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D004318:Doxycycline / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010118:Oxytetracycline / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*; D018508:Water Purification
chemical_list: D000900:Anti-Bacterial Agents; D014867:Water; D006108:Graphite; D004318:Doxycycline; D010118:Oxytetracycline