Rapid and efficient removal of Ni(2+) from aqueous solution by the one-pot synthesized EDTA-modified magnetic nanoparticles.
A facile one-pot process has been proposed to prepare the novel ethylenediaminetetraacetic acid (EDTA)-modified magnetite nanoparticles (EDTA-MNPs). The bared Fe3O4 magnetite nanoparticles and EDTA-MNPs were characterized using FTIR spectroscopy, TEM, VSM, and X-ray diffraction. The application of the modified magnetite nanoparticles for metal ion uptake was studied using Ni(2+) as a model. The adsorption was fast and the equilibrium was established within 5 min, and the adsorption kinetics of Ni(2+) onto EDTA-MNPs followed the pseudo second-order chemisorption mechanism. Maximum adsorption capacity for Ni(2+) reached as high as 41.3 mg/g at pH 6. The successive adsorption-desorption studies indicated that the EDTA-MNPs kept the adsorption and desorption efficiencies constant over ten cycles. Importantly, EDTA-MNPs were able to remove nearly 100 % of Ni(2+) from real water.
College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, 19(A) Yu Quan Road, Beijing, 100049, China.
Junyong
J
Chen
College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, 19(A) Yu Quan Road, Beijing, 100049, China. ymhao@ucas.ac.cn.
Yongmei
Y
Hao
College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, 19(A) Yu Quan Road, Beijing, 100049, China.
Man
M
Chen
D000327:Adsorption; D004492:Edetic Acid / Q000737:chemistry*; D007700:Kinetics; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000032:analysis* / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
D058185:Magnetite Nanoparticles; D014874:Water Pollutants, Chemical; D009532:Nickel; D004492:Edetic Acid