This title appears in the Scientific Report :
2008
Please use the identifier:
http://hdl.handle.net/2128/4609 in citations.
Please use the identifier: http://dx.doi.org/10.1021/es800196z in citations.
Bioaccessibility of environmentally Aged 14C-Atrazine Residues in an Agriculturally Used Soil and its Particle-Size Aggregates
Bioaccessibility of environmentally Aged 14C-Atrazine Residues in an Agriculturally Used Soil and its Particle-Size Aggregates
After 22 years of aging under natural conditions in an outdoor lysimeter the bioaccessibility of C-14-labeled atrazine soil residues to bacteria was tested. Entire soil samples as well as sand-sized, silt-sized, and clay-sized aggregates (> 20, 20-2, and < 2 mu m aggregate size, respectively)...
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Personal Name(s): | Jablonowski, N. D. |
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Modler, J. / Schäffer, A. / Burauel, P. | |
Contributing Institute: |
Agrosphäre; ICG-4 |
Published in: | Environmental Science & Technology, 42 (2008) 16, S. 5904 - 5910 |
Imprint: |
Columbus, Ohio
American Chemical Society
2008
|
Physical Description: |
5904 - 5910 |
DOI: |
10.1021/es800196z |
Document Type: |
Journal Article |
Research Program: |
Terrestrische Umwelt |
Series Title: |
Environmental Science and Technology
42 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1021/es800196z in citations.
After 22 years of aging under natural conditions in an outdoor lysimeter the bioaccessibility of C-14-labeled atrazine soil residues to bacteria was tested. Entire soil samples as well as sand-sized, silt-sized, and clay-sized aggregates (> 20, 20-2, and < 2 mu m aggregate size, respectively) were investigated under slurried conditions. The mineralization of residual radioactivity in the outdoor lysimeter soil reached up to 4.5% of the total C-14-activity after 16 days, inoculated with Pseudomonas sp. strain ADP. The control samples without inoculated bacteria showed a mineralization maximum of only about 1% after 44 days of incubation. Mineralization increased in the clay-sized aggregates up to 6.2% of the total residual 14C-activity within 23 days. With decreasing soil aggregate sizes, residual C-14-activity increased per unit of weight, but only minor differences of the mineralization in the soil and soil size aggregates using mineral-media for incubation was observed. Using additional Na-citrate in the incubation,the extent of mineralization increased to 6.7% in soil after 23 days following incubation with Pseudomonas sp. strain ADP. These results show that long-term aged IT-atrazine residues are still partly accessible to the atrazine degrading microorganism Pseudomonas sp. strain ADP. |