|
Title
Lignin removal from aqueous solutions using Fe3O4 magnetic nanoparticles as recoverable adsorbent
Authors
SEYED MOHAMMAD MOSTASHARI SHAHAB SHARIATI and MAHBOOBEH MANOOCHEHRI
Received
September 14, 2012
Published
Volume 47 Issue 9-10 October-December
Keywords
lignin, Fe3O4 magnetic nanoparticles, adsorption, Langmuir isotherm
Abstract
In the present study, the use of Fe3O4 magnetic nanoparticles as recoverable adsorbent for lignin removal from aqueous
solutions has been investigated. Fe3O4 magnetic nanoparticles (MNPs) were chemically synthesized. The size and
cross-section shapes of the synthesized particles were determined by scanning electron microscope (SEM) and X-ray
diffraction analysis (XRD). The effects of some different parameters, including the amount of adsorbent, pH of
solution, salt effect and adsorption time, on the removal efficiency of lignin were investigated and optimized.
The kinetic studies on lignin showed rapid sorption dynamics by a pseudo-second order kinetic model. According to
the isotherm studies, lignin adsorption equilibrium data were fitted well to the Langmuir isotherm. The maximum
monolayer capacity (qmax) and the Langmuir constant (KL) were obtained from the Langmuir model as 2554.42 mg g-1
and 0.812 L mg-1, respectively. The simple synthesis method and the recoverability of Fe3O4MNPs recommend it as a
good adsorbent for lignin removal from aqueous solutions.
Link
|
