TY - JOUR
T1 - A novel pyridinium functionalized magnetic chitosan with pH-independent and rapid adsorption kinetics for magnetic separation of Cr(VI)
AU - Sakti, Satya Candra Wibawa
AU - Narita, Yasuyuki
AU - Sasaki, Takahiro
AU - Nuryono,
AU - Tanaka, Shunitz
N1 - Funding Information:
The authors are grateful to Assoc. Prof. T. Umezawa (Hokkaido University) for FTIR measurement, Prof. Y. Kamiya (Hokkaido University) for XRD and TGA measurements, Ms. M. Kiuchi and Ms. T. Hattori for their assistance with elemental analyses. The magnetic properties, zeta potentials and SEM images were collected at the Open Facility, Sousei Hall, Hokkaido University. SCWS gratefully acknowledge Directorate General of Higher Education (DGHE) of Indonesia for financial support through DGHE Postgraduate Scholarship.
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/8/3
Y1 - 2015/8/3
N2 - A novel pyridinium-diethylenetriamine magnetic chitosan (PDFMC) has been prepared and used for magnetic separation of Cr(VI) from aqueous solution. The PDFMC was characterized by using an X-ray diffractometer (XRD), a Fourier transform infrared (FTIR) spectrometer, a thermo gravimetric analyzer (TGA) and a scanning electron microscope (SEM), while the magnetic property was examined by the magnetic property measurement system magnetometer (MPMS). The PDFMC worked well on removal of Cr(VI) in any condition of acidic, neutral and basic solutions with the capacity (qmax) of 176 mg L-1 (at pH 3, acidic), 124 mg L-1 (pH 6, near-neutral), and 86 mg L-1 (pH 9, basic) based on the Langmuir isotherm model. Kinetics study showed that the removal of Cr(VI) followed the pseudo-second order model with an extremely fast removal rate (the complete adsorption within 5 min). Regeneration of PDFMC could be conducted by simply washing with a mixture of NaOH and NaCl solution and the adsorbent could be used for 5 cycles of adsorption-desorption of Cr(VI) without any significant loss. The fast removal rate, applicability in a wider range of pH and easy regeneration and reusability makes the PDFMC a prospective material for magnetic separation of Cr(VI) from aquatic environments.
AB - A novel pyridinium-diethylenetriamine magnetic chitosan (PDFMC) has been prepared and used for magnetic separation of Cr(VI) from aqueous solution. The PDFMC was characterized by using an X-ray diffractometer (XRD), a Fourier transform infrared (FTIR) spectrometer, a thermo gravimetric analyzer (TGA) and a scanning electron microscope (SEM), while the magnetic property was examined by the magnetic property measurement system magnetometer (MPMS). The PDFMC worked well on removal of Cr(VI) in any condition of acidic, neutral and basic solutions with the capacity (qmax) of 176 mg L-1 (at pH 3, acidic), 124 mg L-1 (pH 6, near-neutral), and 86 mg L-1 (pH 9, basic) based on the Langmuir isotherm model. Kinetics study showed that the removal of Cr(VI) followed the pseudo-second order model with an extremely fast removal rate (the complete adsorption within 5 min). Regeneration of PDFMC could be conducted by simply washing with a mixture of NaOH and NaCl solution and the adsorbent could be used for 5 cycles of adsorption-desorption of Cr(VI) without any significant loss. The fast removal rate, applicability in a wider range of pH and easy regeneration and reusability makes the PDFMC a prospective material for magnetic separation of Cr(VI) from aquatic environments.
KW - Chitosan
KW - Chromium
KW - Magnetite
KW - Pyridinium
KW - Separation
UR - http://www.scopus.com/inward/record.url?scp=84938388850&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2015.05.004
DO - 10.1016/j.jece.2015.05.004
M3 - Article
AN - SCOPUS:84938388850
SN - 2213-3437
VL - 3
SP - 1953
EP - 1961
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 3
M1 - 644
ER -