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Simultaneous attenuation of phytoaccumulation of Cd and As in soil treated with inorganic and organic amendments
2019
Yao, Aijun | Ju, Lin | Ling, Xiaodan | Liu, Chong | Wei, Xiange | Qiu, Hao | Tang, Yetao | Morel, Jean-Louis | Qiu, Rongliang | Li, Charlie | Wang, Shizhong | Sun Yat-sen University [Guangzhou] (SYSU) | Shanghai Jiao Tong University [Shanghai] | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | University of California [Davis] (UC Davis) ; University of California (UC)
International audience | A novel FeSiCa rich material (IS), chicken manure (CM) and its biochar were investigated for their efficiency in simultaneous remediation of Cd and As uptake by the vegetable Brassica chinensis L. Wet chemistry analysis and X-ray powder diffraction, scanning electron microscopy/energy dispersive X-ray spectroscopy as well as Fourier transform infrared spectroscopy were used to reveal the mechanisms responsible for Cd and As fixation in the amended soils. The IS treatment performed best in reducing Cd uptake, while the combination of IS and CM was the optimal one for As fixation. The precipitation/co-precipitation (in cadmium silicate/phosphate/phosphate hydroxide, cadmium iron and manganese oxides under alkaline conditions, and calcium/magnesium/ferric arsenates) and specific chemisorption (by amorphous iron/manganese oxides) were proved to be more efficient in simultaneously lowering As and Cd phytoavailability than was organic complexation. These findings demonstrate that FeSiCa and FeSiCaC amendments are highly efficient and promising in-situ remediation systems for safe crop production on soils contaminated with Cd and As.
Afficher plus [+] Moins [-]Influence of the residence time of street trees and their soils on trace element contamination in Paris (France)
2019
Quenea, Katell | Andrianjara, Iry | Rankovic, Aleksandar | Gan, Erika | Aubry, Emmanuel | Lata, Jean-Christophe | Barot, Sébastien | Castrec-Rouelle, Maryse | Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) ; École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) | Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris) ; Institut National de la Recherche Agronomique (INRA)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire d'Agronomie de la ville de Paris ; Direction des Espaces Verts et de l'Environnement (DEVE) | Institut du Développement Durable et des Relations Internationales (IDDRI) ; Institut d'Études Politiques [IEP] - Paris | Tomsk Polytechnic University [Russie] (UPT) | Ile-de-France region (R2DS); GIS "Climate, Environment, Society" (CCTV2 Project); PIR IngEcoTech (IESUM project); Sorbonne Universities (Dens' project, Convergences program)
International audience | With the actual increasing interest for urban soils, the evaluation of soil contamination by trace elements and the dynamics of this contamination appear mandatory to preserve plant and thereby human health. Street trees and the associated soil placed in pits located nearby roads could represent convenient indicators of urban and vehicle traffic influences on soils and plants. However, data on these soils remain scarce, many studies investigating park soils rather than street tree soils. Furthermore, trace elements could be one of the main factors causing the observed urban tree decline, while practitioners more and more question the possible reuse of these soils after the death of trees as well as tree litter collected in the streets. We evaluated the contamination in anthropogenic trace elements (TE), namely Zn, Pb, and Cd, of street trees (Tilia tomentosa) and their soils distributed all over Paris (France). Street tree soils are imported from rural areas at the plantation of each new tree so that tree age corresponds to the time of residence of the soil within an urban environment allowing the evaluation of temporal trends on TE concentration in soils and trees. The TE concentration revealed an important soil pollution, especially for the older soils (mean age of 80 years old). The consideration of the residence time of trees and soils in an urban environment evidenced an accumulation of Zn and Pb (ca. 4.5 mg kg−1 year−1 and 4 mg kg−1 year−1 for Zn and Pb, respectively). However, leaf concentrations in TE were low and indicate that soil-root transfer was not significant compared to the contamination by atmospheric deposition. These results underlined the necessity to deepen the evaluation of the recycling of urban soils or plants submitted to urban contamination.
Afficher plus [+] Moins [-]Influence of the residence time of street trees and their soils on trace element contamination in Paris (France)
2019
Quenea, Katell | Andrianjara, Iry | Rankovic, Aleksandar | Gan, Erika | Aubry, Emmanuel | Lata, Jean-Christophe | Barot, Sébastien | Castrec-Rouelle, Maryse | Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) ; École Pratique des Hautes Études (EPHE) ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) | Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris) ; Institut National de la Recherche Agronomique (INRA)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire d'Agronomie de la ville de Paris ; Direction des Espaces Verts et de l'Environnement (DEVE) | Institut du Développement Durable et des Relations Internationales (IDDRI) ; Institut d'Études Politiques [IEP] - Paris | Tomsk Polytechnic University [Russie] (UPT) | Ile-de-France region (R2DS); GIS "Climate, Environment, Society" (CCTV2 Project); PIR IngEcoTech (IESUM project); Sorbonne Universities (Dens' project, Convergences program)
International audience | With the actual increasing interest for urban soils, the evaluation of soil contamination by trace elements and the dynamics of this contamination appear mandatory to preserve plant and thereby human health. Street trees and the associated soil placed in pits located nearby roads could represent convenient indicators of urban and vehicle traffic influences on soils and plants. However, data on these soils remain scarce, many studies investigating park soils rather than street tree soils. Furthermore, trace elements could be one of the main factors causing the observed urban tree decline, while practitioners more and more question the possible reuse of these soils after the death of trees as well as tree litter collected in the streets. We evaluated the contamination in anthropogenic trace elements (TE), namely Zn, Pb, and Cd, of street trees (Tilia tomentosa) and their soils distributed all over Paris (France). Street tree soils are imported from rural areas at the plantation of each new tree so that tree age corresponds to the time of residence of the soil within an urban environment allowing the evaluation of temporal trends on TE concentration in soils and trees. The TE concentration revealed an important soil pollution, especially for the older soils (mean age of 80 years old). The consideration of the residence time of trees and soils in an urban environment evidenced an accumulation of Zn and Pb (ca. 4.5 mg kg−1 year−1 and 4 mg kg−1 year−1 for Zn and Pb, respectively). However, leaf concentrations in TE were low and indicate that soil-root transfer was not significant compared to the contamination by atmospheric deposition. These results underlined the necessity to deepen the evaluation of the recycling of urban soils or plants submitted to urban contamination.
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