Effective removal of heavy metal ions Cd2+, Zn2+, Pb2+, Cu2+ from aqueous solution by polymer-modified magnetic nanoparticles.
We prepared novel Fe(3)O(4) magnetic nanoparticles (MNPs) modified with 3-aminopropyltriethoxysilane (APS) and copolymers of acrylic acid (AA) and crotonic acid (CA). The MNPs were characterized by transmission electron microscopy, X-ray diffraction, infra-red spectra and thermogravimetric analysis. We explored the ability of the MNPs for removing heavy metal ions (Cd(2+), Zn(2+), Pb(2+) and Cu(2+)) from aqueous solution. We investigated the adsorption capacity of Fe(3)O(4)@APS@AA-co-CA at different pH in solution and metal ion uptake capacity as a function of contact time and metal ion concentration. Moreover, adsorption isotherms, kinetics and thermodynamics were studied to understand the mechanism of the synthesized MNPs adsorbing metal ions. In addition, we evaluated the effect of background electrolytes on the adsorption. Furthermore, we explored desorption and reuse of MNPs. Fe(3)O(4)@APS@AA-co-CA MNPs are excellent for removal of heavy metal ions such as Cd(2+), Zn(2+), Pb(2+) and Cu(2+) from aqueous solution. Furthermore, the MNPs could efficiently remove the metal ions with high maximum adsorption capacity at pH 5.5 and could be used as a reusable adsorbent with convenient conditions.
Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
Fei
F
Ge
Meng-Meng
MM
Li
Hui
H
Ye
Bao-Xiang
BX
Zhao
D000179:Acrylates / Q000737:chemistry; D000327:Adsorption; D003437:Crotonates / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D008280:Magnetics; D019216:Metals, Heavy / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D011437:Propylamines; D012821:Silanes / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D000179:Acrylates; D003437:Crotonates; D019216:Metals, Heavy; D011108:Polymers; D011437:Propylamines; D012821:Silanes; D014874:Water Pollutants, Chemical; C036658:acrylic acid; C477625:amino-propyl-triethoxysilane; D052203:Ferrosoferric Oxide; C569473:crotonic acid