Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils
In this study, the effects of incubation time and the method of soil solution extraction and filtration on the empirical distribution coefficient (Kd) obtained by de-sorbing indigenous selenium (Se) and iodine (I) from arable and woodland soils under temperate conditions were investigated. Incubati...
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/45331/ |
| _version_ | 1848797110552494080 |
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| author | Al Mahayni, T. Bailey, Elizabeth H. Crout, Neil M.J. Shaw, George |
| author_facet | Al Mahayni, T. Bailey, Elizabeth H. Crout, Neil M.J. Shaw, George |
| author_sort | Al Mahayni, T. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In this study, the effects of incubation time and the method of soil solution extraction and filtration on the empirical distribution coefficient (Kd) obtained by de-sorbing indigenous selenium (Se) and iodine (I) from arable and woodland soils under temperate conditions were investigated.
Incubation time had a significant soil- and element- dependent effect on the Kd values, which tended to decrease with the incubation time. Generally, a four-week period was sufficient for the desorption Kd value to stabilise. Concurrent solubilisation of soil organic matter (OM) and release of organically-bound Se and I was probably responsible for the observed decrease in Kd with time. This contrasts with the conventional view of OM as a sink for Se and I in soils. Selenium and I Kd values were not significantly affected by the method of soil solution extraction and filtration.
The results suggest that incubation time is a key criterion when selecting Se and I Kd values from the literature for risk assessments. Values derived from desorption of indigenous soil Se and I might be most appropriate for long-term assessments since they reflect the quasi-equilibrium state of their partitioning in soils. |
| first_indexed | 2025-11-14T19:58:40Z |
| format | Article |
| id | nottingham-45331 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:58:40Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-453312020-05-04T19:54:58Z https://eprints.nottingham.ac.uk/45331/ Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils Al Mahayni, T. Bailey, Elizabeth H. Crout, Neil M.J. Shaw, George In this study, the effects of incubation time and the method of soil solution extraction and filtration on the empirical distribution coefficient (Kd) obtained by de-sorbing indigenous selenium (Se) and iodine (I) from arable and woodland soils under temperate conditions were investigated. Incubation time had a significant soil- and element- dependent effect on the Kd values, which tended to decrease with the incubation time. Generally, a four-week period was sufficient for the desorption Kd value to stabilise. Concurrent solubilisation of soil organic matter (OM) and release of organically-bound Se and I was probably responsible for the observed decrease in Kd with time. This contrasts with the conventional view of OM as a sink for Se and I in soils. Selenium and I Kd values were not significantly affected by the method of soil solution extraction and filtration. The results suggest that incubation time is a key criterion when selecting Se and I Kd values from the literature for risk assessments. Values derived from desorption of indigenous soil Se and I might be most appropriate for long-term assessments since they reflect the quasi-equilibrium state of their partitioning in soils. Elsevier 2017-10 Article PeerReviewed Al Mahayni, T., Bailey, Elizabeth H., Crout, Neil M.J. and Shaw, George (2017) Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils. Journal of Environmental Radioactivity, 177 . pp. 84-90. ISSN 1879-1700 Soil indigenous selenium and iodine; Distribution coefficient (Kd); Incubation time; Soil solution = extraction; Rhizon soil moisture samplers http://www.sciencedirect.com/science/article/pii/S0265931X17304216 doi:10.1016/j.jenvrad.2017.06.004 doi:10.1016/j.jenvrad.2017.06.004 |
| spellingShingle | Soil indigenous selenium and iodine; Distribution coefficient (Kd); Incubation time; Soil solution = extraction; Rhizon soil moisture samplers Al Mahayni, T. Bailey, Elizabeth H. Crout, Neil M.J. Shaw, George Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title | Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title_full | Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title_fullStr | Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title_full_unstemmed | Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title_short | Effects of incubation time and filtration method on Kd of indigenous selenium and iodine in temperate soils |
| title_sort | effects of incubation time and filtration method on kd of indigenous selenium and iodine in temperate soils |
| topic | Soil indigenous selenium and iodine; Distribution coefficient (Kd); Incubation time; Soil solution = extraction; Rhizon soil moisture samplers |
| url | https://eprints.nottingham.ac.uk/45331/ https://eprints.nottingham.ac.uk/45331/ https://eprints.nottingham.ac.uk/45331/ |