Thermal stability of arsenic complexes in soils
| العنوان: | Thermal stability of arsenic complexes in soils |
|---|---|
| المؤلفون: | Zdena Lnenickova, Bohuslava Cejkova, Barbora Doušová, Iva Jackova, Frantisek Buzek |
| المصدر: | Journal of Hazardous Materials. 416:125715 |
| بيانات النشر: | Elsevier BV, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Environmental Engineering, Iron, Health, Toxicology and Mutagenesis, 0211 other engineering and technologies, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Arsenic, Soil, Dissolved organic carbon, Vadose zone, Soil Pollutants, Environmental Chemistry, Thermal stability, Leaching (agriculture), Waste Management and Disposal, Czech Republic, 0105 earth and related environmental sciences, 021110 strategic, defence & security studies, Pollution, Amorphous solid, chemistry, Environmental chemistry, Soil water, River catchment |
| الوصف: | The release of soil arsenic (As) in an unsaturated zone under oxidative conditions and at two temperatures simulating the seasonal effect (15 °C and 23 °C) was studied in four cultivated soils from the Elbe River catchment (Czech Republic, Central Europe). The soils with a low geogenic As background contained from 10 to 50 µg.g−1 of As, mostly originating from atmospheric deposition in the past. The temperature effect on the stability of As in soils was studied in connection with the stability of hydrated iron (Fe) oxides and dissolved organic carbon (DOC), as essential binding partners of As in soils. The temperature impact on As release was related to the actual As binding in soil determined by the sequential leaching. With predominant As binding to amorphous and poorly crystalline Fe phases the higher temperature (23 °C) increased As release up to twice compare to 15 °C. In the soils with a low total Fe and the preferential As binding to well-crystallised Fe phases the temperature effect on As release was negligible. Unlike Fe, the release of DOC is strongly temperature dependent, therefore As mobilisation was controlled by the DOC concentration. A higher experimental temperature (23 °C) supported the formation of DOC and the consequent release of As and Fe into the soil solution. |
| تدمد: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2021.125715 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ae55f9a3a94c978af6b9763a201ee05 https://doi.org/10.1016/j.jhazmat.2021.125715 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....5ae55f9a3a94c978af6b9763a201ee05 |
| قاعدة البيانات: | OpenAIRE |
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