Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation.
Porous acrylonitrile (AN)/methyl acrylate (MA) copolymer beads were prepared by suspended emulsion polymerization. The cyano groups in AN/MA copolymer beads were converted to amidoxime (AO) groups by reaction with hydroxylamine hydrochloride (NH(2)OH.HCl) to remove metal ions in aqueous solution. The untreated AN/MA and amidoximated AN/MA (AO AN/MA) copolymer beads were characterized by FTIR spectroscopy, SEM, and porous structural analysis. Both mesopores and macropores were presented in AN/MA and AO AN/MA copolymer beads. Qualitative experiments of adsorption were conducted to evaluate modified and unmodified resins on fixing Hg(2+), Ag(+), Cu(2+), Fe(3+) and Pb(2+) from aqueous solution using batch extractions. It was found that AO AN/MA copolymer beads have excellent adsorption capacities for Hg(2+), Ag(+) and Cu(2+), especially for Hg(2+), and it have good selectivity for Hg(2+). The equilibrium was established in 10h through adsorption kinetics study. The Langmuir model was much better than the Freundlich model to describe the isothermal process.
Liu
Xin
X
School of Chemistry & Materials Science, Ludong University, Shandong 264025, China.
Chen
Hou
H
Wang
Chunhua
C
Qu
Rongjun
R
Ji
Chunnuan
C
Sun
Changmei
C
Zhang
Ying
Y
D000179:Acrylates / Q000138:chemical synthesis* / Q000737:chemistry; D000181:Acrylonitrile / Q000138:chemical synthesis* / Q000737:chemistry; D000327:Adsorption; D004655:Emulsions; D006863:Hydrogen-Ion Concentration; D019811:Hydroxylamine / Q000737:chemistry; D007477:Ions; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008956:Models, Chemical; D010091:Oximes / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared
D000179:Acrylates; D004655:Emulsions; D007477:Ions; D008670:Metals; D010091:Oximes; D011108:Polymers; D019811:Hydroxylamine; D000181:Acrylonitrile; C035956:methyl acrylate