Dynamic of arsenic present in naturally enriched soil: focus on plant transfer and earthworms impact
We proposed here to investigate a naturally arsenic (As) enriched soil using laboratory experiments (rhizoboxes and microcosms). After a characterisation of the arsenic repartition in soil using sequential extractions, the study focused on As transfer in two plants: a fern (Pteris vittata) L. and a tomato species (Lycospersicon esculenturn Mill.). Phosphate addition was also tested in order to highlight a potential risk linked to the use of fertilizers. The second part of the study investigates As dynamics: earthworms by their bburrowing and casting activiies were assumed to influence As availability. Indeed, earthworms may induce a modification of As speciation in the systern Main results show a significant As accumulation in the plants studied as well as a clear influence of phosphate addition. Nevertheless, impact of earthworm bioturbation on As moility seems to be quite limited.
arsenic earthworm geogene origin plant soil transfer
V. Matera N. Grisel C. Degen R. C. Le Bayon Karl Foellmi1, J. M. Gobat
Laboratory of Geochemistry Sedimentology and Mineralogy, Geological Institute, Neuchatel University, Laboratory Soil & Vegetation, Biological Institute, Neuchatel University, CH-2009 Neuchatel, Switzer
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
852-853
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）