Drivers to improve metal(loid) phytoextraction with a focus on microbial degradation of dissolved organic matter in soils
Language
en
Article de revue
This item was published in
International Journal of Phytoremediation. 2024, vol. 26, n° 1, p. 63-81
Taylor & Francis
English Abstract
Bioaugmentation of soils can increase the mobilization of metal(loid)s from the soil-bearing phases. However, once desorbed, these metal(loid)s are mostly complexed to the dissolved organic matter (DOM) in the soil solution, ...Read more >
Bioaugmentation of soils can increase the mobilization of metal(loid)s from the soil-bearing phases. However, once desorbed, these metal(loid)s are mostly complexed to the dissolved organic matter (DOM) in the soil solution, which can restrict their availability to plants (roots mainly taking up the free forms) and then the phytoextraction performances. Firstly the main drivers influencing phytoextraction are reminded, then the review focuses on the DOM role. After having reminding the origin, the chemical structure and the lability of DOM, the pool of stable DOM (the most abundant in the soil) most involved in the complexation of metal(loid)s is addressed in particular by focusing on carboxylic and/or phenolic groups and factors controlling metal(loid) complexation with DOM. Finally, this review addresses the ability of microorganisms to degrade metal(loid)-DOM complexes as an additional lever for increasing the pool of free metal(loid) ions, and then phytoextraction performances, and details the origin of microorganisms and how they are selected. The development of innovative processes including the use of these DOM-degrading microorganisms is proposed in perspectives.Read less <
English Keywords
bacteria
bioaugmentation
carboxylic acid groups
complexing agent
phenolic groups
phytomanagement
ANR Project
Biofortified and climate-resilient food and fodder production on marginal soils - ANR-20-FASU-0003
Origin
Hal imported