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Speciation and Complexation of Cadmium in Extracted Soil Solutions
Abstract
We report the soil solution speciation of Cd in 64 field-collected contaminated soils containing between 0.1 and 38 mg Cd kg - 1 . The soils were analyzed for pH (3.5−8.1), soil organic matter (8.0−108 g C kg - 1 ), total dissolved Cd (0.03−182 μg Cd L - 1 ), dissolved organic carbon (1.5−12 mg C L - 1 ), and free Cd 2+ (10 - 10 −2 × 10 - 7 M). Free Cd 2+ activity in solution was determined using differential pulse anodic stripping voltammetry (DPASV), assuming DPASV is sensitive to easily dissociated inorganic ion-pairs and free Cd 2+ while excluding organic complexes. The solid/liquid partition coefficient ( K d ) varied over a range from 10 to 100 000, and the fraction of the dissolved Cd present in solution as the estimated free Cd 2+ species varied between 0 and 60% but averaged about 20%. The dissolved concentrations of Cd and the free Cd 2+ activity in the soil solutions of contaminated soils of different origins can be predicted with reasonable accuracy using a simple competitive adsorption model dependent on pH and total metal loading.
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Citations
Cited by
Arsenic fractionation in soils using an improved sequential extraction procedure
Wenzel, W. W., Kirchbaumer, N., Prohaska, T., Stingeder, G., Lombi, E., & Adriano, D. C. (2001) · Analytica Chimica Acta · doi:10.1016/s0003-2670(01)00924-2 · Cited by 1,408
Edelstein, M., & Ben-Hur, M. (2018) · Scientia Horticulturae · doi:10.1016/j.scienta.2017.12.039 · Cited by 501
Degryse, F., Smolders, E., & Parker, D. R. (2009) · European Journal of Soil Science · doi:10.1111/j.1365-2389.2009.01142.x · Cited by 403
Tipping, E., Rieuwerts, J., Pan, G., Ashmore, M. R., Lofts, S., Hill, M. T. R., Farago, M. E., & Thornton, I. (2003) · Environmental Pollution · doi:10.1016/s0269-7491(03)00058-7 · Cited by 398
Peijnenburg, W. J. G. M., Zablotskaja, M., & Vijver, M. G. (2007) · Ecotoxicology and Environmental Safety · doi:10.1016/j.ecoenv.2007.02.008 · Cited by 326
Metadata
- Authors
- Sauvé, S., Norvell, W. A., McBride, M., & Hendershot, W.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-12-07
- Volume
- 34
- Issue
- 2
- Pages
- 291-296
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2050999417
- Cited by
- 331
- References
- 0
- FWCI
- 7.72
- Type
- journal article
- Language
- en
- Open access
- closed
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- Sauvé, S., Norvell, W. A., McBride, M., & Hendershot, W. (2000). Speciation and Complexation of Cadmium in Extracted Soil Solutions. Environmental Science & Technology. https://doi.org/10.1021/es990202z
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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