TY - JOUR
T1 - Heavy metal binding by inactivated tissues of Solanum elaeagnifolium
T2 - Chemical and subsequent XAS studies
AU - Tiemann, K. J.
AU - Rascon, A. E.
AU - Gamez, G.
AU - Parsons, J. G.
AU - Baig, T.
AU - Cano-Aguilera, I.
AU - Gardea-Torresdey, J. L.
N1 - Funding Information:
The authors would like to acknowledge financial support from 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, which 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. The authors also acknowledge financial support from the Southwest Center for Environmental Research and Policy (SCERP) program. Finally the author acknowledge the help of G. George and I. Pickering for their help with the X-ray absorption work.
PY - 2002
Y1 - 2002
N2 - Contamination caused by heavy metals as well as their toxic effects on the environment and mankind is well known. However, it has been observed that some native plants have survived within areas polluted with heavy metals. This has been the case with the woody subshrub Solanum elaeagnifolium. It is possible to take advantage of this singular feature by using its inactivated tissues as a biofiltration system. In this work we characterized the mechanism of the binding between the biomass tissues with heavy metals by using chemical modification techniques. These techniques included chemical esterification and hydrolyzation of carboxylic groups and methyl esters, respectively. These studies have shown an overall decrease in metal binding for the esterified biomass, and an overall increase in metal binding for the hydrolyzed biomass as compared with the unmodified biomass. These experiments were performed with Cu(II), Pb(II), Cr(III), Zn(II) and Ni(II). In addition, experiments conducted with modified biomass at different pH conditions were done in order to corroborate the biomass modification results. Also, we used X-ray absorption spectroscopy techniques (XANES and EXAFS) to elucidate the mechanism(s) of metal ion binding.
AB - Contamination caused by heavy metals as well as their toxic effects on the environment and mankind is well known. However, it has been observed that some native plants have survived within areas polluted with heavy metals. This has been the case with the woody subshrub Solanum elaeagnifolium. It is possible to take advantage of this singular feature by using its inactivated tissues as a biofiltration system. In this work we characterized the mechanism of the binding between the biomass tissues with heavy metals by using chemical modification techniques. These techniques included chemical esterification and hydrolyzation of carboxylic groups and methyl esters, respectively. These studies have shown an overall decrease in metal binding for the esterified biomass, and an overall increase in metal binding for the hydrolyzed biomass as compared with the unmodified biomass. These experiments were performed with Cu(II), Pb(II), Cr(III), Zn(II) and Ni(II). In addition, experiments conducted with modified biomass at different pH conditions were done in order to corroborate the biomass modification results. Also, we used X-ray absorption spectroscopy techniques (XANES and EXAFS) to elucidate the mechanism(s) of metal ion binding.
KW - Binding mechanism
KW - Bioremediation
KW - Heavy metals
KW - Solanum elaeagnifolium
KW - X-Ray absorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0036221526&partnerID=8YFLogxK
U2 - 10.1016/S0026-265X(02)00005-X
DO - 10.1016/S0026-265X(02)00005-X
M3 - Article
AN - SCOPUS:0036221526
VL - 71
SP - 133
EP - 141
JO - Microchemical Journal
JF - Microchemical Journal
SN - 0026-265X
IS - 2-3
ER -