Use of X-ray absorption spectroscopy' and esterification to investigate Cr(III) and Ni(II) ligands in alfalfa biomass

Kirk J. Tiemann, Jorge L. Gardea-Torresdey, Gerardo Gamez, Kenneth Dokken, Salvador Sias, Mark W. Renner, Lars R Furenlid

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

Previously performed studies have shown that alfalfa shoot biomass can bind an appreciable amount of nickel(II) and chromium(III) ions from aqueous solution. Direct and indirect approaches were applied to study the possible mechanisms involved in metal binding by the alfalfa biomass. The direct approach involves investigations of the metal-bound alfalfa shoot biomass by X-ray absorption spectroscopic analysis (XANES and EXAFS). Results from these studies suggest that nickel(II) and chromium(III) binding mostly occurs through coordination with oxygen ligands. Indirect approaches consist of chemical modification of carboxylate groups that have been shown to play an important role in metal binding to the alfalfa biomass. An appreciable decrease in metal binding resulted after acidic methanol esterification of the biomass, indicating that carboxyl groups are entailed in the metal binding by the alfalfa biomass. In addition, base hydrolysis of the alfalfa biomass increased the binding of these metals, which further indicates that carboxyl groups play an important role in the binding of these metal ions from solution. Therefore, by combining two different techniques, our results indicate that carboxylate groups are the major ligands responsible for the binding of nickel(II) and chromium(III) by alfalfa biomass.

Original languageEnglish (US)
Pages (from-to)150-154
Number of pages5
JournalEnvironmental Science and Technology
Volume33
Issue number1
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

Fingerprint

X ray absorption spectroscopy
Esterification
atomic absorption spectroscopy
alfalfa
X-ray spectroscopy
ligand
Biomass
Ligands
metal binding
Metals
biomass
Chromium
Nickel
chromium
nickel
metal
shoot
Spectroscopic analysis
ion
Chemical modification

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Use of X-ray absorption spectroscopy' and esterification to investigate Cr(III) and Ni(II) ligands in alfalfa biomass. / Tiemann, Kirk J.; Gardea-Torresdey, Jorge L.; Gamez, Gerardo; Dokken, Kenneth; Sias, Salvador; Renner, Mark W.; Furenlid, Lars R.

In: Environmental Science and Technology, Vol. 33, No. 1, 01.01.1999, p. 150-154.

Research output: Contribution to journalArticle

Tiemann, Kirk J. ; Gardea-Torresdey, Jorge L. ; Gamez, Gerardo ; Dokken, Kenneth ; Sias, Salvador ; Renner, Mark W. ; Furenlid, Lars R. / Use of X-ray absorption spectroscopy' and esterification to investigate Cr(III) and Ni(II) ligands in alfalfa biomass. In: Environmental Science and Technology. 1999 ; Vol. 33, No. 1. pp. 150-154.
@article{873764c8cf0a4b7981e303d9aa0396e9,
title = "Use of X-ray absorption spectroscopy' and esterification to investigate Cr(III) and Ni(II) ligands in alfalfa biomass",
abstract = "Previously performed studies have shown that alfalfa shoot biomass can bind an appreciable amount of nickel(II) and chromium(III) ions from aqueous solution. Direct and indirect approaches were applied to study the possible mechanisms involved in metal binding by the alfalfa biomass. The direct approach involves investigations of the metal-bound alfalfa shoot biomass by X-ray absorption spectroscopic analysis (XANES and EXAFS). Results from these studies suggest that nickel(II) and chromium(III) binding mostly occurs through coordination with oxygen ligands. Indirect approaches consist of chemical modification of carboxylate groups that have been shown to play an important role in metal binding to the alfalfa biomass. An appreciable decrease in metal binding resulted after acidic methanol esterification of the biomass, indicating that carboxyl groups are entailed in the metal binding by the alfalfa biomass. In addition, base hydrolysis of the alfalfa biomass increased the binding of these metals, which further indicates that carboxyl groups play an important role in the binding of these metal ions from solution. Therefore, by combining two different techniques, our results indicate that carboxylate groups are the major ligands responsible for the binding of nickel(II) and chromium(III) by alfalfa biomass.",
author = "Tiemann, {Kirk J.} and Gardea-Torresdey, {Jorge L.} and Gerardo Gamez and Kenneth Dokken and Salvador Sias and Renner, {Mark W.} and Furenlid, {Lars R}",
year = "1999",
month = "1",
day = "1",
doi = "10.1021/es9804722",
language = "English (US)",
volume = "33",
pages = "150--154",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Use of X-ray absorption spectroscopy' and esterification to investigate Cr(III) and Ni(II) ligands in alfalfa biomass

AU - Tiemann, Kirk J.

AU - Gardea-Torresdey, Jorge L.

AU - Gamez, Gerardo

AU - Dokken, Kenneth

AU - Sias, Salvador

AU - Renner, Mark W.

AU - Furenlid, Lars R

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Previously performed studies have shown that alfalfa shoot biomass can bind an appreciable amount of nickel(II) and chromium(III) ions from aqueous solution. Direct and indirect approaches were applied to study the possible mechanisms involved in metal binding by the alfalfa biomass. The direct approach involves investigations of the metal-bound alfalfa shoot biomass by X-ray absorption spectroscopic analysis (XANES and EXAFS). Results from these studies suggest that nickel(II) and chromium(III) binding mostly occurs through coordination with oxygen ligands. Indirect approaches consist of chemical modification of carboxylate groups that have been shown to play an important role in metal binding to the alfalfa biomass. An appreciable decrease in metal binding resulted after acidic methanol esterification of the biomass, indicating that carboxyl groups are entailed in the metal binding by the alfalfa biomass. In addition, base hydrolysis of the alfalfa biomass increased the binding of these metals, which further indicates that carboxyl groups play an important role in the binding of these metal ions from solution. Therefore, by combining two different techniques, our results indicate that carboxylate groups are the major ligands responsible for the binding of nickel(II) and chromium(III) by alfalfa biomass.

AB - Previously performed studies have shown that alfalfa shoot biomass can bind an appreciable amount of nickel(II) and chromium(III) ions from aqueous solution. Direct and indirect approaches were applied to study the possible mechanisms involved in metal binding by the alfalfa biomass. The direct approach involves investigations of the metal-bound alfalfa shoot biomass by X-ray absorption spectroscopic analysis (XANES and EXAFS). Results from these studies suggest that nickel(II) and chromium(III) binding mostly occurs through coordination with oxygen ligands. Indirect approaches consist of chemical modification of carboxylate groups that have been shown to play an important role in metal binding to the alfalfa biomass. An appreciable decrease in metal binding resulted after acidic methanol esterification of the biomass, indicating that carboxyl groups are entailed in the metal binding by the alfalfa biomass. In addition, base hydrolysis of the alfalfa biomass increased the binding of these metals, which further indicates that carboxyl groups play an important role in the binding of these metal ions from solution. Therefore, by combining two different techniques, our results indicate that carboxylate groups are the major ligands responsible for the binding of nickel(II) and chromium(III) by alfalfa biomass.

UR - http://www.scopus.com/inward/record.url?scp=0032962558&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032962558&partnerID=8YFLogxK

U2 - 10.1021/es9804722

DO - 10.1021/es9804722

M3 - Article

AN - SCOPUS:0032962558

VL - 33

SP - 150

EP - 154

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 1

ER -