Dendrochemical assessment of mercury releases from a pond and dredged-sediment landfill impacted by a chlor-alkali plant

Maillard, François; Girardclos, Olivier; Assad, Mohamad; Zappelini, Cyril; Mena, Julia Maria Pérez; Yung, Loïc; Guyeux, Christophe; Chrétien, Stéphane; Bigham, Gary N.; Cosio, Claudia; Chalot, Michel

doi:10.1016/j.envres.2016.03.034

Cited by 38 publications

(29 citation statements)

References 23 publications

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“…These sediments were originated from the effluents produced during the chlor-alkali Hg-cell process used for the electrolysis of NaCl. A detailed map of the industrial site was provided by Maillard et al (2016). ICP-AES analyses revealed that total Hg and total As were significantly increased in the dump compared to the levels in soil from an adjacent undisturbed forest.…”

Section: Site Descriptionmentioning

confidence: 99%

“…Hg-unexposed plants (ni-and i-) were grown in the same growth chamber, while Hg-exposed plants (ni+ and i+) were grown in a separate growth chamber. Hg-enriched soil (6.38 mg kg -1 Hg) from the industrial tailings described above was added to the Hg-contaminated growth chamber to create an Hg-enriched atmosphere as previously described (Assad et al, 2016). The soil was not in direct contact with the plants in any way but provided an atmospheric enrichment with Hg, similar to that observed in the natural environment.…”

Section: Pot Experiments With Hg-resistant Bacteria and Peppermentioning

confidence: 99%

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Bacterial diversity associated with poplar trees grown on a Hg-contaminated site: Community characterization and isolation of Hg-resistant plant growth-promoting bacteria

Durand

Maillard

Álvarez-López

et al. 2018

Science of The Total Environment

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Industrial waste dumps are rarely colonized by vegetation after they have been abandoned, indicating biological infertility. Revegetation of industrial tailings dumps is thus necessary to prevent wind erosion, metal leaching and has been shown to restore soil functions and ecosystem services. However, little is known about the microbial colonization and community structure of vegetated tailings following the application of restoration technologies. In this study, we investigated the rhizosphere and phyllosphere bacterial communities of a poplar tree plantation within a phytomanagement-based restoration program of a Hg-contaminated site. We used Illumina-based sequencing combined with culture-dependent approaches to describe plant-associated bacterial communities and to isolate growth-promoting bacteria (PGPB) and Hg-resistant bacteria. The genus Streptomyces was highly specific to the root community, accounting for 24.4% of the relative abundance but only representing 0.8% of the soil community, whereas OTUs from the Chloroflexi phylum were essentially detected in the soil community. Aboveground habitats were dominated by bacteria from the Deinococcus-Thermus phylum, which were not detected in belowground habitats. Leaf and stem habitats were characterized by several dominant OTUs, such as those from the phylum Firmicutes in the stems or from the genera Methylobacterium, Kineococcus, Sphingomonas and Hymenobacter in the leaves. Belowground habitats hosted more cultivable Hg-resistant bacteria than aboveground habitats and more Hg-resistant bacteria were found on the episphere than in endospheric habitats. Hg-resistant isolates exhibiting plant growth-promoting (PGP) traits, when used as inoculants of Capsicum annuum, were shown to increase its root dry biomass but not Hg concentration. The N-fixing and Hg-resistant species Pseudomonas graminis, observed in the poplar phyllosphere, may be a key microorganism for the restoration of industrial tailings dumps.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Pot Experiments With Hg-resistant Bacteria and Peppermentioning

confidence: 99%

Bacterial diversity associated with poplar trees grown on a Hg-contaminated site: Community characterization and isolation of Hg-resistant plant growth-promoting bacteria

Durand

Maillard

Álvarez-López

et al. 2018

Science of The Total Environment

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“…This method is known as dendrochemistry, i.e., the chronological analysis of elements in the annual growth rings of wood (Nabais et al 1999, Scharnweber et al 2016, Sensula et al 2017). An important assumption in dendrochemistry is that the elemental concentrations in a given growth ring are the result of environmental conditions at the time of wood formation (Berger et al 2004, Vaganov et al 2013, Maillard et al 2016. Dendrochemistry is still an evolving scientific field (Scharnweber et al 2016), whose applications include the biomonitoring of environmental pollution (Cocozza et al 2016), reconstruction of longer-term changes in environmental conditions, or the detection and dating of volcanic eruptions, etc.…”

Section: Introductionmentioning

confidence: 99%

Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land

Bārdule¹,

Bērtiņš²,

Buša³

et al. 2020

iForest

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Biogeosciences and Forestry Biogeosciences and Forestry Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land Arta Bardule (1-2) , Maris Bertins (2) , Lauma Busa (2) , Dagnija Lazdina (1) , Arturs Viksna (2) , Michaela Tvrdonova (3-4) , Viktor Kanicky (3-4) , Tomas Vaculovic (3-4) Fast growing tree species such as Populus spp. in short rotation woody crop (SRWC) systems could be an environmentally friendly and cost-effective approach to ensure sustainable biomass production and mitigate the negative impacts on the environment caused by more intensive management aimed to promote additional biomass increment. Knowledge on variation of major biologically important elements' and toxic heavy metals' occurrence in fertilised hybrid aspen tree rings in marginal land may have important and relevant implications for the management practice and evaluation of element fluxes in SRWC ecosystems. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to determine the relative amount of major elements (K, Ca, Mg, P) and heavy metals (Cd, Hg, Pb) in stem wood plane on straight line trajectory starting from pith to bark with measurement step 0.1 mm. While inductively coupled plasma mass spectrometry (ICP-MS) was used to determine average content of the mentioned elements in mechanically separated tree rings to quantify data obtained using LA-ICP-MS method and expressed in relative units. Stem disc samples were collected from six year old hybrid aspen trees growing in marginal agricultural land in the central part of Latvia (hemi-boreal climate conditions) that were initially fertilised with biogas production residues, sewage sludge, and wood ash. We concluded that the content of analysed major elements and heavy metals in the hybrid aspen tree rings varied considerably not only within the analysed stem plane (across tree rings) of one sample tree, but also within one annual ring with significant differences between the content of major elements in earlywood and latewood. Nevertheless, the results of the content of major elements and heavy metals in hybrid aspen tree rings highlighted the significant impact of the initially used fertiliser (especially wood ash) on the average content of elements. Hybrid aspens can be considered bioindicators of both the management activities and general growing conditions even if soil pH is close to neutrality, suggesting a limited mobility of the heavy metals.

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“…Previous studies that have quantified Hg in tree rings have either documented post‐Industrial Revolution increases corresponding with gradually increasing Hg concentrations in the atmosphere (Clackett et al, ; Peckham et al, ; Wright et al, ) or peaks in tree ring Hg corresponding with the timing of local industrial sources (Hojdová et al, ; Maillard et al, ; Navratil et al, ; Navratil et al, ). The present study differs in that the main feature of the measured tree ring Hg time series derives from a previously unidentified source.…”

Section: Discussionmentioning

confidence: 99%

Mercury Accumulation in Tree Rings: Observed Trends in Quantity and Isotopic Composition in Shenandoah National Park, Virginia

et al. 2020

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Recent studies have shown that mercury (Hg) concentrations in tree rings have the potential to archive historical Hg exposure from local, regional, and global sources. The southeastern United States has received elevated Hg deposition, yet no studies have evaluated tree ring Hg in this region. Here, we quantify Hg accumulation and isotopic composition in tree rings collected in Shenandoah National Park, Virginia. Cores were collected from three individuals of three tree species—white oak (Quercus alba), northern red oak (Quercus rubra), and pitch pine (Pinus rigida)—within the northern, central, and southern areas of the Park (n = 27 cores). The cores were analyzed for Hg content in 10‐year increments, with some cores dating back to the early 1800s. Overall, tree ring Hg concentrations (ranging from below detection to 4.4 ng/g) were similar to other studies and varied between species, with pitch pine having higher concentrations than the deciduous species. The most notable feature of the tree ring Hg time series was a peak that occurred during the 1930s through 1950s, coinciding with the use of Hg at a local industrial facility. Atmospheric modeling indicates that potential emissions from the plant likely had a stronger impact on the southern region of the Park, consistent with the latitudinal gradient in tree ring Hg concentrations. Mass‐dependent and mass‐independent fractionation of Hg isotopes suggests contributions from both regional anthropogenic and local industrial sources during this period. This study demonstrates the potential usefulness of tree ring dendrochemistry for identifying historical sources of atmospheric Hg exposure.

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Dendrochemical assessment of mercury releases from a pond and dredged-sediment landfill impacted by a chlor-alkali plant

Cited by 38 publications

References 23 publications

Bacterial diversity associated with poplar trees grown on a Hg-contaminated site: Community characterization and isolation of Hg-resistant plant growth-promoting bacteria

Bacterial diversity associated with poplar trees grown on a Hg-contaminated site: Community characterization and isolation of Hg-resistant plant growth-promoting bacteria

Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land

Mercury Accumulation in Tree Rings: Observed Trends in Quantity and Isotopic Composition in Shenandoah National Park, Virginia

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