Use of Brassica juncea and Dactylis glomerata for the phytostabilization of mine soils amended with compost or biochar

Chemosphere
Donato ViscontiR Clemente

Abstract

Phytostabilization of mine soils contaminated by potentially toxic elements (PTEs) requires plants tolerant to PTE toxicity and to the poor soil physico-chemical characteristics of these areas. A pot experiment was carried out to assess the phytostabilization potential of Brassica juncea and Dactylis glomerata in mine soils amended with compost and biochar. Furthermore, the Environmental Risk of the soils and the effects of the phytostabilization process on the microbiological population size and activity in the soils were also determined. According to the Ecological Risk Index (ERI) the soils studied presented "very high risk" and As, Cd and Pb were the target elements for phytostabilization. Both amendments improved soil conditions (e.g., increasing total-N and total organic-C concentrations) and contributed to PTE (Cd, Pb and Zn) immobilization in the soil. Compost showed a more marked effect on soil microbial biomass and nutrients release in soil, which led to higher B. juncea and D. glomerata biomass in compost treated soils. Biochar treatment showed a positive effect only on D. glomerata growth, despite it provoked strong PTE immobilization in both soils. The addition of both amendments resulted in an overall reduction of...Continue Reading

Citations

May 20, 2021·Environmental Geochemistry and Health·Héctor M Conesa, Isabel Párraga-Aguado
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Agata BorowikJan Kucharski

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