Humic Acid/Quercetin Coated Magnetic Fe3O4 Nanoparticles For Adsorptive Removal of Cu2+ and Ni2+
Abstract
Removal
of metals and heavy metals from industrial wastewaters is a serious concern for
water systems. In this study, environmentally friendly natural polymer coated,
cost-effective, easy to operate HA/QR magnetic nanoparticles were suggested to
overcome this problem, for the first time in literature. Fe3O4
magnetic nanoparticles were synthesized with co-precipitation technique and a
core-shell structure was obtained with humic acid sodium salt (HA) solution. At
the second step of the procedure, synthesized magnetic nanoparticles were
coated with quercetin solution. Scanning electron microscopy (SEM), X-Ray diffraction
(XRD) and particle size analyses were performed to enlighten and characterize
the structure. The newly synthesized nanoparticles were used for the batch-wise
adsorption of copper and nickel metals, successfully. Maximum adsorption
capacities were calculated as 14.61 mg/g for copper and 28.30 mg/g using 0.03 g
adsorbents, at pH=7. Adsorption isotherms were evaluated and it was concluded
that adsorption equilibrium fitted to both Langmuir and Freundlich isotherm
models, better correlated with Langmuir isotherm model.
Keywords
Fe3O4 magnetic nanoparticles,metal removal,adsorption isotherm,Humic acid
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