title: A novel biodegradable β-cyclodextrin-based hydrogel for the removal of heavy metal ions.
abstract: A novel biodegradable β-cyclodextrin-based gel (CAM) was prepared and applied to the removal of Cd(2+), Pb(2+) and Cu(2+) ions from aqueous solutions. CAM hydrogel has a typical three-dimensional network structure, and showed excellent capability for the removal of heavy metal ions. The effect of different experimental parameters, such as initial pH, adsorbent dosage and initial metal ion concentration, were investigated. The adsorption isotherm data fitted well to the Freundlich model. The adsorption capacity was in the order Pb(2+)>Cu(2+)>Cd(2+) under the same experimental conditions. The maximum adsorption capacities for the metal ions in terms of mg/g of dry gel were 210.6 for Pb(2+), 116.41 for Cu(2+), and 98.88 for Cd(2+). The biodegradation efficiency of the resin reached 79.4% for Gloeophyllum trabeum. The high adsorption capacity and kinetics results indicate that CAM can be used as an alternative adsorbent to remove heavy metals from aqueous solution.
authors.affiliation: Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China. huangzh1975@163.com
authors.forename: Zhanhua
authors.initials: Z
authors.lastname: Huang
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Wu
authors.forename: Shouxin
authors.initials: S
authors.lastname: Liu
authors.forename: Tian
authors.initials: T
authors.lastname: Liu
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D005658:Fungi / Q000378:metabolism; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D019216:Metals, Heavy / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D012996:Solutions; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D019216:Metals, Heavy; D012996:Solutions; D047392:beta-Cyclodextrins; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate
keywords: Adsorbent; Adsorption; Biodegradable; Heavy metal removal; β-Cyclodextrin