Influence of Ecological Restoration on Mercury Mobility and Microbial Activities on Former Guyanese Mining Sites - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Applied Sciences Année : 2021

Influence of Ecological Restoration on Mercury Mobility and Microbial Activities on Former Guyanese Mining Sites

Résumé

As rehabilitation efforts in Guyana are recent, there is little information on the effect of different ecological rehabilitation protocols for Guyana's mining sites on biogeochemical cycles and mercury mobility. This study was conducted to assess the impact of different ecological restoration protocols on soil quality with the use of soil microbial indicators and by estimating the mercury mobility. We sampled soil from six rehabilitated mining sites in French Guyana with different ecological restoration procedures. We carried out measurements of enzymatic activities and an analysis of mercury environmental speciation to assess its potential toxicity according to a mobility gradient. The results obtained in this study show that the rehabilitation of mining sites has been carried out in a heterogeneous manner and soil quality is very variable, even in nearby sites. Sites that have been rehabilitated with fabaceous species have positive soil quality indicators. In addition, the results highlight a change in mercury mobility that is 82.1% correlated after co-inertia analysis with soil texture properties, which also confirms a direct effect of rehabilitation on mercury mobility. The non-restored sites had a much higher potential of mercury mobility and toxicity than the sites where ecological restoration was successful. These results highlight the positive effect of controlled rehabilitation and ecological restoration on microbiological activities and the potential toxicity of mercury.
Fichier principal
Vignette du fichier
applsci-11-02231-v2.pdf (1.5 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03985837 , version 1 (16-02-2023)

Licence

Paternité

Identifiants

Citer

Ewan Couic, Vanessa Alphonse, Alexandre Livet, Stéphanie Giusti-Miller, Noureddine Bousserrhine. Influence of Ecological Restoration on Mercury Mobility and Microbial Activities on Former Guyanese Mining Sites. Applied Sciences, 2021, 11 (5), pp.2231. ⟨10.3390/app11052231⟩. ⟨hal-03985837⟩
49 Consultations
40 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More