title: Removal of Hg(II) from aqueous solution by resin loaded magnetic β-cyclodextrin bead and graphene oxide sheet: Synthesis, adsorption mechanism and separation properties.
abstract: Resin loaded magnetic β-cyclodextrin bead and graphene oxide sheet (MCD-GO-R) was synthesized successfully and found to be an excellent adsorbent for Hg(II) removal. The as-prepared adsorbent was characterized by SEM, FTIR, BET, magnetization curve and zeta potential analysis respectively. Good magnetic performance made MCD-GO-R simply recover from aqueous solution at low magnetic field within 30s. And also, the rich functional groups and outstanding dispersity play an important role in the adsorption process. The maximum adsorption capacity was 88.43 mg g(-1) at 323 K and pH 7.1. The as-prepared adsorbent could perform well in a wide pH range from 4.0 to 10.0. Static adsorption experimental data showed good correlation with pseudo-second-order model and Freundlich isotherm models. It was found that the contaminant adsorption was accomplished mainly via chelation or ion exchange and come to equilibrium in only 30 min. All experimental results, especially the excellent reproducibility and resistance to ion interference, suggest that MCD-GO-R has promising applications in water treatment.
authors.affiliation: School of Resources and Environment, University of Jinan, Jinan 250022, China.
authors.forename: Limei
authors.initials: L
authors.lastname: Cui
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Yaoguang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Gao
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Hu
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Wei
authors.affiliation: School of Resources and Environment, University of Jinan, Jinan 250022, China. Electronic address: dubin61@gmail.com.
authors.forename: Bin
authors.initials: B
authors.lastname: Du
mesh_terms: D000327:Adsorption; D002614:Chelating Agents / Q000737:chemistry; D002852:Chromatography, Ion Exchange; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008280:Magnetics; D008628:Mercury / Q000032:analysis*; D019216:Metals, Heavy; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D007477:Ions; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D047392:beta-Cyclodextrins; D006108:Graphite; D008628:Mercury; C031215:betadex
keywords: GO; Hg(II); Isotherm; Kinetics; Magnetic β-cyclodextrin; Thermodynamic