TY - JOUR
T1 - Infrared and X-ray absorption spectroscopic studies on the mechanism of
chromium(III) binding to alfalfa biomass
AU - Gardea-Torresdey, JL
AU - Dokken, K
AU - Tiemann, KJ
AU - Parsons, JG
AU - Ramos, J
AU - Pingitore, NE
AU - Gamez Goytia, Gerardo
N1 - Funding Information:
The authors acknowledge the financial support of the Science To Achieve Results (STAR) Fellowship (U-91558301-1) through the Environmental Protection Agency (EPA) and the National Institutes of Health (NIH) (Grant S06GM8012-30). We also acknowledge the financial support from the University of Texas at El Paso (UTEP) Center for Environmental Resource Management (CERM) through funding from the Office of Exploratory Research of the EPA (Cooperative Agreement CR-819849-01-4). We also acknowledge the HBCU/MI Environmental Technology Consortium that is funded by the Department of Energy. Portions of this research were carried out at the Stanford Synchrotron Radiation Laboratory (SSRL), a national user facility operated by Stanford University on behalf of the US Department on Energy (DOE), Office of Basic Energy Sciences. The SSRL Structural Molecular Biology Program is supported by The DOE, Office of Biological and Environmental Research, and by the NIH, National Center for Research Resources, Biomedical Technology Program. In addition the authors would like to acknowledge the SSRL/DOE funded Gateway Program.
PY - 2002/4
Y1 - 2002/4
N2 - Previous studies have shown that alfalfa biomass possesses the potential
to be a biosorbent for chromium(III) removal from contaminated and
industrial wastewaters. However, the mechanism through which
chromium(III) binds to alfalfa biomass has not been identified.
Therefore, studies were conducted to determine how modification of
chemical groups present on the alfalfa biomass affect the chromium(III)
binding. Batch pH profile studies were performed on esterified,
hydrolyzed and unmodified alfalfa biomasses. A comparison study with ion
exchange resins containing carboxyl, thiol, amino, sulfonic, and
phosphate groups were also performed. These studies showed that
chromium(III) binds predominantly to the alfalfa biomass through
carboxyl ligands and follows a binding trend similar to that of the
carboxyl resin. In addition, Fourier transform infrared spectroscopy
(FTIR) studies were conducted in order to better understand how the
chemical modification affects the alfalfa biomass and the m
AB - Previous studies have shown that alfalfa biomass possesses the potential
to be a biosorbent for chromium(III) removal from contaminated and
industrial wastewaters. However, the mechanism through which
chromium(III) binds to alfalfa biomass has not been identified.
Therefore, studies were conducted to determine how modification of
chemical groups present on the alfalfa biomass affect the chromium(III)
binding. Batch pH profile studies were performed on esterified,
hydrolyzed and unmodified alfalfa biomasses. A comparison study with ion
exchange resins containing carboxyl, thiol, amino, sulfonic, and
phosphate groups were also performed. These studies showed that
chromium(III) binds predominantly to the alfalfa biomass through
carboxyl ligands and follows a binding trend similar to that of the
carboxyl resin. In addition, Fourier transform infrared spectroscopy
(FTIR) studies were conducted in order to better understand how the
chemical modification affects the alfalfa biomass and the m
KW - Alfalfa
KW - Chromium(III) binding
KW - Fourier transform infrared
KW - Ion exchange resins
KW - Modification
KW - X-Ray absorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0036214517&partnerID=8YFLogxK
U2 - 10.1016/S0026-265X(02)00007-3
DO - 10.1016/S0026-265X(02)00007-3
M3 - Article
VL - 71
SP - 157
EP - 166
JO - MICROCHEMICAL JOURNAL
JF - MICROCHEMICAL JOURNAL
IS - 2-3
ER -