ETDA as a legacy soil chelatant: a comparative study to a more environmentally sensitive alternative for metal removal by Pistia stratiotes L.
| العنوان: | ETDA as a legacy soil chelatant: a comparative study to a more environmentally sensitive alternative for metal removal by Pistia stratiotes L. |
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| المؤلفون: | Lebrun, Manhattan, Szakova, Jirina, Drabek, Ondrej, Tejnecky, Vaclav, Hough, Rupert, Beesley, Luke, Wang, Hailong, Trakal, Lukas |
| المصدر: | Environmental Science and Pollution Research. 30(29):74314-74326 |
| مصطلحات موضوعية: | Soil chelatants, DOC leaching, Metal speciation modeling, Rhizofiltration, Water lettuce, Miljövetenskap, Environmental Science |
| الوصف: | The accuracy of environmental risk assessment depends upon selecting appropriate matrices to extract the most risk-relevant portion of contaminant(s) from the soil. Here, we applied the chelatants EDTA and tartaric acid to extract a metal-contaminated soil. Pistia stratiotes was applied as an indicator plant to measure accumulation from the metal-laden bulk solutions generated, in a hydroponic experiment lasting 15 days. Speciation modeling was used to elucidate key geo-chemical mechanisms impacting matrix and metal-specific uptake revealed by experimental work. The highest concentrations of soil-borne metals were extracted from soil by EDTA (7.4% for Cd), but their uptake and translocation to the plant were restricted due to the formation of stable metal complexes predominantly with DOC. Tartaric acid solubilized metals to a lesser extent (4.6% for Cd), but a higher proportion was plant available due to its presence mainly in the form of bivalent metal cations. The water extraction showed the lowest metal extraction (e.g., 3.9% for Cd), but the metal species behaved similarly to those extracted by tartaric acid. This study demonstrates that not all extractions are equal and that metal-specific speciation will impact accurate risk assessment in soil (water)-plant systems. In the case of EDTA, a deleterious impact on DOC leaching is an obvious drawback. As such, further work should now determine soil and not only metal-specific impacts of chelatants on the extraction of environmentally relevant portions of metal(loid)s. |
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| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-132354 https://doi.org/10.1007/s11356-023-27537-6 |
| قاعدة البيانات: | SwePub |
Find this article in full text from Springer Verlag. | تدمد: | 09441344 16147499 |
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| DOI: | 10.1007/s11356-023-27537-6 |