Identification of Green Rust in Groundwater
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Identification of Green Rust in Groundwater. / Christiansen, Bo C.; Balic Zunic, Tonci; Dideriksen, Knud; Stipp, Susan Louise Svane.
In: Environmental Science & Technology (Washington), Vol. 43, No. 10, 2009, p. 3436-3441.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Identification of Green Rust in Groundwater
AU - Christiansen, Bo C.
AU - Balic Zunic, Tonci
AU - Dideriksen, Knud
AU - Stipp, Susan Louise Svane
PY - 2009
Y1 - 2009
N2 - Green rust, a family of Fe(II),Fe(III) layered double hydroxides, is believed to be present in environments close to the Fe(II)/Fe(III) transition zone. Attempts to identify members of this family in nature have proven difficult because the material is oxidized after only a few minutes exposure to air. In this paper, we present a sampling method for capturing green rust so it is not oxidized. We then we used the method to identify the compound in a groundwater sample taken below the water table from fractures in granite. X-ray diffraction patterns were weak, but clearly identical to those of synthetic GRCO3, the green rust familymemberwherecarbonate and water occupy the interlayer between the iron-hydroxide layers. The method was then tested on samples taken from an artesian well and a deep underground experimental station, both within the Fe(II)/Fe(III) redox zone. In both cases, GRCO3 could be identified. Currently, transport models for predicting the behavior of contaminants in groundwater do not include parameters for green rust. This work demonstrates they should.
AB - Green rust, a family of Fe(II),Fe(III) layered double hydroxides, is believed to be present in environments close to the Fe(II)/Fe(III) transition zone. Attempts to identify members of this family in nature have proven difficult because the material is oxidized after only a few minutes exposure to air. In this paper, we present a sampling method for capturing green rust so it is not oxidized. We then we used the method to identify the compound in a groundwater sample taken below the water table from fractures in granite. X-ray diffraction patterns were weak, but clearly identical to those of synthetic GRCO3, the green rust familymemberwherecarbonate and water occupy the interlayer between the iron-hydroxide layers. The method was then tested on samples taken from an artesian well and a deep underground experimental station, both within the Fe(II)/Fe(III) redox zone. In both cases, GRCO3 could be identified. Currently, transport models for predicting the behavior of contaminants in groundwater do not include parameters for green rust. This work demonstrates they should.
KW - Faculty of Science
U2 - 10.1021/es8011047
DO - 10.1021/es8011047
M3 - Journal article
VL - 43
SP - 3436
EP - 3441
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 10
ER -
ID: 12301945