Contribution of microbial activity to formation of organically bound chlorine during batch incubation of forest soil using 37Cl as a tracer

Osswald, Aurélie; Poszwa, Anne; Bueno, Maı̈té; Arnaudguilhem, Carine; Billet, David; Thiry, Yves; Leyval, Corinne

doi:10.1016/j.soilbio.2016.06.012

Cited by 9 publications

(6 citation statements)

References 49 publications

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“…KNO 3 solution was used referring to some previous studies. 9,74,75 We confirmed that the KNO 3 solution does not induce chlorination by comparing Cl concentrations after washing by ultrapure water and KNO 3 solution (Figure S7).…”

Section: ■ Conclusionsupporting

confidence: 56%

Quantitative Speciation of Insoluble Chlorine in Environmental Solid Samples

Mukai¹,

Fujimori²,

Shiota³

et al. 2019

ACS Omega

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Since organically bound chlorine (organo-Cl) has been determined by different methods depending on samples and study fields, it has been difficult to compare organo-Cl in different environments. Here, we focused on Cl in water-insoluble fractions (insoluble Cl) and applied Cl K-edge X-ray absorption spectroscopy in conjunction with combustion ion chromatography. Quantitative speciation of insoluble Cl enabled us to compare the concentrations of Cl bonded with aromatic carbon (aromatic-Cl) and aliphatic carbon (aliphatic-Cl) as well as organo-Cl across different types of environmental solid samples (soils, particulate matter, dust, and ashes). The concentrations of organo-Cl in house dust and urban particulate matter exceeded those in forest soils, suggesting that house dust and urban particulate matter may be important pools of organochlorine compounds (OCs). Further, by studying representative samples with concentrations of some individual organochlorine compounds (OCs), we evaluated the mass balance of identified/unidentified organo-Cl. The percentages of identified Cl to organo-Cl were up to 1% in all samples evaluated, suggesting the ubiquitous presence of unidentified OCs. We also estimated the chemical forms of insoluble inorganic Cl and tested the plots of organo-Cl versus total organic carbon to find the difference between samples. This work shows that the quantitative speciation of insoluble Cl is effective for crosscomparison of organo-Cl in different environmental solid samples.

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Section: ■ Conclusionsupporting

confidence: 56%

Quantitative Speciation of Insoluble Chlorine in Environmental Solid Samples

Mukai¹,

Fujimori²,

Shiota³

et al. 2019

ACS Omega

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“…However, overall anthropogenic sources were estimated to contribute to less than 10% of the global CF production of 700-820 Gg/y [5]. Natural CF emissions have been reported from numerous terrestrial and aquatic environments such as forest soils [6][7][8][9], rice fields [10], groundwater [11], oceans [12], and hypersaline lakes [13,14]. The formation of CF is mediated by biotic and abiotic processes, including burning of vegetation, chemical production by reactive iron species, and enzymatic halogenation [15].…”

Section: Introductionmentioning

confidence: 99%

Metagenomic- and Cultivation-Based Exploration of Anaerobic Chloroform Biotransformation in Hypersaline Sediments as Natural Source of Chloromethanes

Peng

Bosma

et al. 2020

Microorganisms

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Chloroform (CF) is an environmental contaminant that can be naturally formed in various environments ranging from forest soils to salt lakes. Here we investigated CF removal potential in sediments obtained from hypersaline lakes in Western Australia. Reductive dechlorination of CF to dichloromethane (DCM) was observed in enrichment cultures derived from sediments of Lake Strawbridge, which has been reported as a natural source of CF. No CF removal was observed in abiotic control cultures without artificial electron donors, indicating biotic CF dechlorination in the enrichment cultures. Increasing vitamin B12 concentration from 0.04 to 4 µM in enrichment cultures enhanced CF removal and reduced DCM formation. In cultures amended with 4 µM vitamin B12 and 13C labelled CF, formation of 13CO2 was detected. Known organohalide-respiring bacteria and reductive dehalogenase genes were neither detected using quantitative PCR nor metagenomic analysis of the enrichment cultures. Rather, members of the order Clostridiales, known to co-metabolically transform CF to DCM and CO2, were detected. Accordingly, metagenome-assembled genomes of Clostridiales encoded enzymatic repertoires for the Wood-Ljungdahl pathway and cobalamin biosynthesis, which are known to be involved in fortuitous and nonspecific CF transformation. This study indicates that hypersaline lake microbiomes may act as a filter to reduce CF emission to the atmosphere.

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“…Since TMAH is one of the most popular thermochemolysis reagents [14], the studies about TMAH thermochemolysis have been reviewed for its application on the analyses of humic acids [52,84,90,102,103], humic-like substances [104e107], fatty acids [82,88,102,108], phenolic compounds [16,19,81,109], amino acids [64,110], aromatic and aliphatic compounds [29,111], and carbamates [112]. In addition, TMAH is not only a thermochemolysis reagent but is also used as an effective silicon etching solvent [113e115], for dissolution of E. crypticus [116], as a strong base catalyst for transesterification [117], as an extraction solvent for mercury [42,118e121], and Sulfur atom detection [17,122], as a dispersant [123], as a balance-fluid in the fabrication of functionalized-porosity layered-ceramics processes [124], as a digestion solvent for biological samples [125,126], for pH adjustment of solutions [127,128], and for extraction of different halogen elements in soils, such as fluorine [129], chloride [130,131], bromine [132,133], and iodine [134e137]. The detection of iodine can be useful for two main types of applications; the first, measurements of the concentration and distribution of iodine in soils [138e140], and the transference of iodine in different forms between soils and plants [141e146], as well as foods [147,148], have been combined with characterization by inductively coupled...…”

Section: Applicationsmentioning

confidence: 99%

The search for organic compounds with TMAH thermochemolysis: From Earth analyses to space exploration experiments

He¹,

Buch²,

Szopa³

et al. 2020

TrAC Trends in Analytical Chemistry

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Tetramethylammonium hydroxide (TMAH) is one of the most popular methylation reagents that have been increasingly used for the detection of organic compounds within a wide range of samples, such as soil, coal, lacquer, lignin, polymers and for in situ analysis of solid samples by space experiments. The analytical methods and instruments, experimental conditions, and the qualitative and quantitative analysis of organic compounds using TMAH thermochemolysis for the last 10 years were reviewed; additionally, the mechanism of TMAH thermochemolysis and TMAH degradation are overviewed herein. The objective of this paper is to give a broad view of the TMAH thermochemolysis analysis, to demonstrate how the technique can be used for the detection of organics on Mars and other planets, and to promote cooperation between different disciplines which may use thermochemolysis.

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Contribution of microbial activity to formation of organically bound chlorine during batch incubation of forest soil using 37Cl as a tracer

Cited by 9 publications

References 49 publications

Quantitative Speciation of Insoluble Chlorine in Environmental Solid Samples

Quantitative Speciation of Insoluble Chlorine in Environmental Solid Samples

Metagenomic- and Cultivation-Based Exploration of Anaerobic Chloroform Biotransformation in Hypersaline Sediments as Natural Source of Chloromethanes

The search for organic compounds with TMAH thermochemolysis: From Earth analyses to space exploration experiments

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