TY - JOUR
T1 - Preparation and characterization of corn cob activated carbon coated with nano-sized magnetite particles for the removal of Cr(VI)
AU - Nethaji, S.
AU - Sivasamy, A.
AU - Mandal, A. B.
PY - 2013
Y1 - 2013
N2 - Activated carbon prepared from corn cob biomass, magnetized by magnetite nanoparticles (MCCAC) was used for the adsorption of hexavalent chromium from aqueous solution. The adsorbent was characterized by SEM, TEM, XRD, VSM, surface functionality and zero-point charge. The iron oxide nanoparticles were of 50. nm sizes and the saturation magnetization value for the adsorbent is 48.43. emu/g. Adsorption was maximum at pH 2. Isotherm data were modeled using Langmuir, Freundlich and Temkin isotherm. The prepared MCCAC had a heterogeneous surface. The maximum monolayer adsorption capacity was 57.37. mg/g. Kinetic studies were carried out and the data fitted the pseudo second-order equation. The mechanism of the adsorption process was studied by incorporating the kinetic data with intraparticle diffusion model, Bangham equation and Boyd plot. The adsorption was by chemisorption and the external mass transfer was the rate-determining step. A micro column was designed and the basic column parameters were estimated.
AB - Activated carbon prepared from corn cob biomass, magnetized by magnetite nanoparticles (MCCAC) was used for the adsorption of hexavalent chromium from aqueous solution. The adsorbent was characterized by SEM, TEM, XRD, VSM, surface functionality and zero-point charge. The iron oxide nanoparticles were of 50. nm sizes and the saturation magnetization value for the adsorbent is 48.43. emu/g. Adsorption was maximum at pH 2. Isotherm data were modeled using Langmuir, Freundlich and Temkin isotherm. The prepared MCCAC had a heterogeneous surface. The maximum monolayer adsorption capacity was 57.37. mg/g. Kinetic studies were carried out and the data fitted the pseudo second-order equation. The mechanism of the adsorption process was studied by incorporating the kinetic data with intraparticle diffusion model, Bangham equation and Boyd plot. The adsorption was by chemisorption and the external mass transfer was the rate-determining step. A micro column was designed and the basic column parameters were estimated.
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U2 - 10.1016/j.biortech.2013.02.012
DO - 10.1016/j.biortech.2013.02.012
M3 - Article
C2 - 23500565
AN - SCOPUS:84875269227
SN - 0960-8524
VL - 134
SP - 94
EP - 100
JO - Bioresource Technology
JF - Bioresource Technology
ER -