title: Adsorption of phenolic compounds from aqueous solution using salicylic acid type adsorbent.
abstract: In this study, 5-aminosalicylic acid (5-ASA) was successfully grafted onto the poly(glycidyl methacrylate) (PGMA) macromolecular chains of PGMA/SiO(2) to obtain adsorbent ASA-PGMA/SiO(2). The adsorption properties of ASA-PGMA/SiO(2) for phenolic compounds were studied through batch and column methods. The experimental results showed that ASA-PGMA/SiO(2) possesses strong adsorption ability for phenolic compounds, and its adsorption capacity for phenol, 4-chlorophenol, and p-nitrophenol reaches 1.0, 1.1, and 1.32 mmolg(-1), respectively. In addition, pH has a great influence on the adsorption capacity. The adsorption isotherm data obeyed the Langmuir model well than Freundlich model. The desorption of phenolic compounds from the ASA-PGMA/SiO(2) adsorbent was most effectively achieved in a 0.1 molL(-1) sodium hydroxide solution. Consecutive adsorption-desorption experiments showed that the ASA-PGMA/SiO(2) adsorbent could be reused almost without any loss in the adsorption capacity.
authors.affiliation: Department of Chemical, North University of China, Taiyuan 030051, People's Republic of China. anfuqiang@nuc.edu.cn
authors.forename: Fuqiang
authors.initials: F
authors.lastname: An
authors.forename: Ruikui
authors.initials: R
authors.lastname: Du
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Wang
authors.forename: Min
authors.initials: M
authors.lastname: Wan
authors.forename: Xin
authors.initials: X
authors.lastname: Dai
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Gao
mesh_terms: D000327:Adsorption; D010131:Aminosalicylic Acid / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010636:Phenols / Q000302:isolation & purification*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012996:Solutions; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D010636:Phenols; D011109:Polymethacrylic Acids; D012996:Solutions; D014874:Water Pollutants, Chemical; C042535:polyglycidyl methacrylate; D010131:Aminosalicylic Acid; D012822:Silicon Dioxide