Pedosphere 31(6): 944--953, 2021
ISSN 1002-0160/CN 32-1315/P
©2021 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Assessment of compost and three biochars associated with Ailanthus altissima (Miller) Swingle for lead and arsenic stabilization in a post-mining Technosol
Ibrahim ALIDOU-ARZIKA1,2, Manhattan LEBRUN1,3, Florie MIARD1, Romain NANDILLON1, Gülriz BAYÇU2, Sylvain BOURGERIE1, Domenico MORABITO1
1University of Orléans, INRA USC1328, LBLGC EA1207, Orléans 45067 (France)
2Division of Botany, Department of Biology, Faculty of Science, Istanbul University, Istanbul 34134 (Turkey)
3Department of Bioscience and Territory, University of Molise, Pesche 86090 (Italy)
ABSTRACT
      The elevated presence of metal(loid)s in the environment significantly impacts ecosystems and human health and is generally largely due to industrial and mining activities. Thus, in the current study, we investigated and proposed an environmentally friendly method (phytomanagement) aimed at reducing the negative impacts associated with metal(loid) pollution through the use of soil amendments (biochar and compost) to permit Ailanthus altissima growth on a highly contaminated mining Technosol, with arsenic (As) and lead (Pb) contents of 539.06 and 11 453 mg kg-1, respectively. The objective was to examine the impacts of three biochars and compost on i) the physicochemical characteristics of soil, ii) metal(loid) immobilization in soil, and iii) A. altissima growth. We revealed that the application of biochar as a soil amendment improved soil conditions by increasing soil electrical conductivity, pH, and water-holding capacity. Moreover, concomitantly, we observed a large reduction (99%) in Pb mobility and availability following application of the hardwood biochar in combination with compost (HBCP). Thus, this combined soil amendment was most effective in promoting A. altissima growth. In addition, the HBCP treatment prevented As translocation in the upper parts of plants, although soil pore water As concentration was not diminished by amendment application.
Key Words:  amendment,metal(loid),mining soil,phytomanagement,soil pore water
Citation: Alidou-Arzika I, Lebrun M, Miard F, Nandillon R, Bay?u G, Bourgerie S, Morabito D. 2021. Assessment of compost and three biochars associated with Ailanthus altissima (Miller) Swingle for lead and arsenic stabilization in a post-mining Technosol. Pedosphere. 31(6): 944–953.
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