Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques

Lancaster Environment Centre

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https://doi.org/10.1021/es051246c
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Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques. / Unsworth, Emily R.; Warnken, Kent W.; Zhang, Hao et al.
In: Environmental Science and Technology, Vol. 40, No. 6, 15.03.2006, p. 1942-1949.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Unsworth, ER, Warnken, KW, Zhang, H , Davison, W, Black, F, Buffle, J, Cao, J, Cleven, R, Galceran, J, Gunkel, P, Kalis, E, Kistler, D, Van Leeuwen, HP, Martin, M, Noël, S, Nur, Y, Odzak, N, Puy, J, Van Riemsdijk, W, Sigg, L, Temminghoff, E, Tercier-Waeber, M-L, Toepperwien, S, Town, RM, Weng, L & Xue, H 2006, 'Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques', Environmental Science and Technology, vol. 40, no. 6, pp. 1942-1949. https://doi.org/10.1021/es051246c

APA

Unsworth, E. R., Warnken, K. W., Zhang, H., Davison, W., Black, F., Buffle, J., Cao, J., Cleven, R., Galceran, J., Gunkel, P., Kalis, E., Kistler, D., Van Leeuwen, H. P., Martin, M., Noël, S., Nur, Y., Odzak, N., Puy, J., Van Riemsdijk, W., ... Xue, H. (2006). Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques. Environmental Science and Technology, 40(6), 1942-1949. https://doi.org/10.1021/es051246c

Vancouver

Unsworth ER, Warnken KW, Zhang H , Davison W, Black F, Buffle J et al. Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques. Environmental Science and Technology. 2006 Mar 15;40(6):1942-1949. doi: 10.1021/es051246c

Author

Unsworth, Emily R. ; Warnken, Kent W. ; Zhang, Hao et al. / Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques. In: Environmental Science and Technology. 2006 ; Vol. 40, No. 6. pp. 1942-1949.

Bibtex

@article{b56b4a401230466d9dab53cfff670949,

title = "Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques",

abstract = "Measurements of trace metal species in situ in a softwater river, a hardwater lake, and a hardwater stream were compared to the equilibrium distribution of species calculated using two models, WHAM 6, incorporating humic ion binding model VI and visual MINTEQ incorporating NICA-Donnan. Diffusive gradients in thin films (DGT) and voltammetry at a gel integrated microelectrode (GIME) were used to estimate dynamic species that are both labile and mobile. The Donnan membrane technique (DMT) and hollow fiber permeation liquid membrane (HFPLM) were used to measure free ion activities. Predictions of dominant metal species using the two models agreed reasonably well, even when colloidal oxide components were considered. Concentrations derived using GIME were generally lower than those from DGT, consistent with calculations of the lability criteria that take into account the smaller time window available for the flux to GIME. Model predictions of free ion activities generally did not agree with measurements, highlighting the need for further work and difficulties in obtaining appropriate input data.",

author = "Unsworth, {Emily R.} and Warnken, {Kent W.} and Hao Zhang and William Davison and Frank Black and Jacques Buffle and Jun Cao and Rob Cleven and Josep Galceran and Peggy Gunkel and Erwin Kalis and David Kistler and {Van Leeuwen}, {Herman P.} and Michel Martin and St{\'e}phane No{\"e}l and Yusuf Nur and Niksa Odzak and Jaume Puy and {Van Riemsdijk}, Willem and Laura Sigg and Erwin Temminghoff and Mary-Lou Tercier-Waeber and Stefanie Toepperwien and Town, {Raewin M.} and Liping Weng and Hanbin Xue",

year = "2006",

month = mar,

day = "15",

doi = "10.1021/es051246c",

language = "English",

volume = "40",

pages = "1942--1949",

journal = "Environmental Science and Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

number = "6",

}

RIS

TY - JOUR

T1 - Model Predictions of Metal Speciation in Freshwaters Compared to Measurements by In Situ Techniques

AU - Unsworth, Emily R.

AU - Warnken, Kent W.

AU - Zhang, Hao

AU - Davison, William

AU - Black, Frank

AU - Buffle, Jacques

AU - Cao, Jun

AU - Cleven, Rob

AU - Galceran, Josep

AU - Gunkel, Peggy

AU - Kalis, Erwin

AU - Kistler, David

AU - Van Leeuwen, Herman P.

AU - Martin, Michel

AU - Noël, Stéphane

AU - Nur, Yusuf

AU - Odzak, Niksa

AU - Puy, Jaume

AU - Van Riemsdijk, Willem

AU - Sigg, Laura

AU - Temminghoff, Erwin

AU - Tercier-Waeber, Mary-Lou

AU - Toepperwien, Stefanie

AU - Town, Raewin M.

AU - Weng, Liping

AU - Xue, Hanbin

PY - 2006/3/15

Y1 - 2006/3/15

N2 - Measurements of trace metal species in situ in a softwater river, a hardwater lake, and a hardwater stream were compared to the equilibrium distribution of species calculated using two models, WHAM 6, incorporating humic ion binding model VI and visual MINTEQ incorporating NICA-Donnan. Diffusive gradients in thin films (DGT) and voltammetry at a gel integrated microelectrode (GIME) were used to estimate dynamic species that are both labile and mobile. The Donnan membrane technique (DMT) and hollow fiber permeation liquid membrane (HFPLM) were used to measure free ion activities. Predictions of dominant metal species using the two models agreed reasonably well, even when colloidal oxide components were considered. Concentrations derived using GIME were generally lower than those from DGT, consistent with calculations of the lability criteria that take into account the smaller time window available for the flux to GIME. Model predictions of free ion activities generally did not agree with measurements, highlighting the need for further work and difficulties in obtaining appropriate input data.

AB - Measurements of trace metal species in situ in a softwater river, a hardwater lake, and a hardwater stream were compared to the equilibrium distribution of species calculated using two models, WHAM 6, incorporating humic ion binding model VI and visual MINTEQ incorporating NICA-Donnan. Diffusive gradients in thin films (DGT) and voltammetry at a gel integrated microelectrode (GIME) were used to estimate dynamic species that are both labile and mobile. The Donnan membrane technique (DMT) and hollow fiber permeation liquid membrane (HFPLM) were used to measure free ion activities. Predictions of dominant metal species using the two models agreed reasonably well, even when colloidal oxide components were considered. Concentrations derived using GIME were generally lower than those from DGT, consistent with calculations of the lability criteria that take into account the smaller time window available for the flux to GIME. Model predictions of free ion activities generally did not agree with measurements, highlighting the need for further work and difficulties in obtaining appropriate input data.

U2 - 10.1021/es051246c

DO - 10.1021/es051246c

M3 - Journal article

VL - 40

SP - 1942

EP - 1949

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 6

ER -

Research

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