Fungal necromass presents a high potential for Mercury immobilization in soil
(2023) In Chemosphere 311(Part 1).- Abstract
Past industrial activities have generated many contaminated lands from which Mercury (Hg) escapes, primarily by volatilization. Current phytomanagement techniques aim to limit Hg dispersion by increasing its stabilization in soil. Although soil fungi represent a source of Hg emission associated with biovolatilization mechanisms, there is limited knowledge about how dead fungal residues (i.e., fungal necromass) interact with soil Hg. This study determined the Hg biosorption potential of fungal necromass and the chemical drivers of passive Hg binding with dead mycelia. Fungal necromass was incubated under field conditions with contrasting chemical properties at a well-characterized Hg phytomanagement experimental site in France. After... (More)
Past industrial activities have generated many contaminated lands from which Mercury (Hg) escapes, primarily by volatilization. Current phytomanagement techniques aim to limit Hg dispersion by increasing its stabilization in soil. Although soil fungi represent a source of Hg emission associated with biovolatilization mechanisms, there is limited knowledge about how dead fungal residues (i.e., fungal necromass) interact with soil Hg. This study determined the Hg biosorption potential of fungal necromass and the chemical drivers of passive Hg binding with dead mycelia. Fungal necromass was incubated under field conditions with contrasting chemical properties at a well-characterized Hg phytomanagement experimental site in France. After four months of incubation in soil, fungal residues passively accumulated substantial quantities of Hg in their recalcitrant fractions ranging from 400 to 4500 μg Hg/kg. In addition, infrared spectroscopy revealed that lipid compounds explained the amount of Hg biosorption to fungal necromass. Based on these findings, we propose that fungal necromass is likely an important factor in Hg immobilization in soil.
(Less)
- author
- Maillard, François LU ; Pflender, Stéphane ; Heckman, Katherine A. ; Chalot, Michel and Kennedy, Peter G.
- publishing date
- 2023-01
- type
- Contribution to journal
- publication status
- published
- keywords
- Fungal necromass, Hg biosorption, Hg cycle, Phytostabilization
- in
- Chemosphere
- volume
- 311
- issue
- Part 1
- article number
- 136994
- publisher
- Elsevier
- external identifiers
-
- scopus:85141291904
- pmid:36332737
- ISSN
- 0045-6535
- DOI
- 10.1016/j.chemosphere.2022.136994
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2022 Elsevier Ltd
- id
- 0ed153d2-c043-49ba-8804-5647e5a5bf7b
- date added to LUP
- 2024-06-02 15:09:29
- date last changed
- 2024-06-16 15:49:56
@article{0ed153d2-c043-49ba-8804-5647e5a5bf7b,
abstract = {{<p>Past industrial activities have generated many contaminated lands from which Mercury (Hg) escapes, primarily by volatilization. Current phytomanagement techniques aim to limit Hg dispersion by increasing its stabilization in soil. Although soil fungi represent a source of Hg emission associated with biovolatilization mechanisms, there is limited knowledge about how dead fungal residues (i.e., fungal necromass) interact with soil Hg. This study determined the Hg biosorption potential of fungal necromass and the chemical drivers of passive Hg binding with dead mycelia. Fungal necromass was incubated under field conditions with contrasting chemical properties at a well-characterized Hg phytomanagement experimental site in France. After four months of incubation in soil, fungal residues passively accumulated substantial quantities of Hg in their recalcitrant fractions ranging from 400 to 4500 μg Hg/kg. In addition, infrared spectroscopy revealed that lipid compounds explained the amount of Hg biosorption to fungal necromass. Based on these findings, we propose that fungal necromass is likely an important factor in Hg immobilization in soil.</p>}},
author = {{Maillard, François and Pflender, Stéphane and Heckman, Katherine A. and Chalot, Michel and Kennedy, Peter G.}},
issn = {{0045-6535}},
keywords = {{Fungal necromass; Hg biosorption; Hg cycle; Phytostabilization}},
language = {{eng}},
number = {{Part 1}},
publisher = {{Elsevier}},
series = {{Chemosphere}},
title = {{Fungal necromass presents a high potential for Mercury immobilization in soil}},
url = {{http://dx.doi.org/10.1016/j.chemosphere.2022.136994}},
doi = {{10.1016/j.chemosphere.2022.136994}},
volume = {{311}},
year = {{2023}},
}