CH4 isotopic signatures of emissions from oil and gas extraction sites in Romania

Wang, Yuxuan; Zhou, Yuting; Wei, Xudong; Chen, Yuxuan; Beiyuan, Jingzi; She, Jingye; Wang, Lulu; Liu, Juan; Liu, Yu; Wang, Jin; Cao, Jielong; Jiang, Yanfeng; Zheng, Siyu; Zhong, Qijian; Liu, Weifeng

doi:10.1525/elementa.2021.00092

Cited by 11 publications

(12 citation statements)

References 98 publications

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“…Some species in Mycobacterium have been reported to enhance the immunity in aquatic species like salmonids without any negative effects (Prathiviraj et al, 2021). However, several studies indicated that Mycobacterium might be a potential opportunistic pathogen to cause chronic long-term persistent infections in the gut of zebra fish (Wang et al, 2021;Wu et al, 2021). In our study, the relative The Israeli Journal of Aquaculture -Bamidgeh • IJA.73.2021.1520998 abundance of Mycobacterium was higher in CAs group, while no intestine health problem was observed during the cultivation process.…”

Section: Discussionmentioning

confidence: 41%

Effects of dietary compound acidifiers supplementation on growth performance and intestinal health of juvenile American eels (Anguilla rostrata) cultured in cement tanks

Zhang

Wang

Zhai

2021

Israeli Journal of Aquaculture - Bamidgeh

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This experiment was conducted to investigate the effects of compound acidifiers (CAs) on the growth performance and intestinal health of juvenile American eels (Anguilla rostrata) cultured in cement tanks. Six cement tanks with similar fish size and weight (approximately 4 g/fish and 87 kg/tank) were randomly divided into control group and CAs group with three replicates each. The fish of two groups were fed commercial diet and commercial diet supplemented with 4 g/kg CAs, respectively. The trial period was 56 days. The dietary CAs supplementation significantly increased final fish weight, weight gain rate, specific growth rate and feed intake (P<0.05). There were no significant differences in feeding rate, feed efficiency, and survival rate between the control group and CAs group (P>0.05). Protease activity in intestine was increased significantly by CAs supplementation (P<0.05). Lipase activity and amylase activity were similar between control group and CAs group (P>0.05). CAs supplementation significantly increased the villi length and thickness of the intestinal muscular layer (P<0.05). Dietary CAs supplementation increased the richness and the diversity of intestinal microbiota. At the phylum level, the higher relative abundances of Proteobacteria, Actinobacteria and Bacteroidetes and the lower relative abundance of Firmicutes were observed in CAs group compared to the control group. At the genus level, dietary CAs supplementation significantly increased the relative abundances of Faecalitalea, Sphingomonas, Sutterella and Mycobacterium (P<0.05). In conclusion, the dietary 4 g/kg CAs supplementation might improve the growth performance and intestinal health of juvenile American eels cultured in cement tanks.

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Section: Discussionmentioning

confidence: 41%

Effects of dietary compound acidifiers supplementation on growth performance and intestinal health of juvenile American eels (Anguilla rostrata) cultured in cement tanks

Zhang

Wang

Zhai

2021

Israeli Journal of Aquaculture - Bamidgeh

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“…A CRDS instrument (G4302, Picarro Inc., USA) was installed in the aircraft, and samples were taken from the outflow of the instrument into bags of 2 L (Supel™-Inert Multi-Layer Foil bags, Sigma-Aldrich Co. LLC, USA) when an increase in CH 4 mole fractions was observed. The method is described in detail in Menoud et al (2022b).…”

Section: Samplingmentioning

confidence: 99%

“…2. The fossil fuel sources partly overlap with the range of thermogenic CH 4 , but also spread towards lower δ 13 C or higher δ 2 H. This is due to the presence of natural gas of microbial origin in the coal reservoirs of Silesia, in Poland (Kotarba, 2001;Kotarba and Pluta, 2009;, and in Romania (Baciu et al, 2018;Fernandez et al, 2022;Menoud et al, 2022b). We concluded that this microbial CH 4 originates from the CO 2 reduction pathway as defined by Milkov and Etiope (2018), with relatively depleted δ 13 C (< −60 ‰) and relatively enriched δ 2 H (> −250 ‰).…”

Section: The European Methane Isotope Database (Emid)mentioning

confidence: 99%

“…The resulting isotopic source signatures were gathered in a publicly available database, with the first version made accessible on 1 October 2020 (Menoud et al, 2020a), and described in a publicly available report (Menoud et al, 2020b). The European data were used in several publications over the past two years by Menoud et al (2020cMenoud et al ( , 2022b, Maazallahi et al (2020), Defratyka et al (2021), Bakkaloglu et al (2021, Bakkaloglu et al (2022). These studies emphasised the benefits from regional estimates of source CH 4 isotopic composition.…”

Section: Introductionmentioning

confidence: 99%

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New contributions of measurements in Europe to the global inventory of the stable isotopic composition of methane

Menoud

Veen

Lowry

et al. 2022

Earth Syst. Sci. Data

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Abstract. Recent climate change mitigation strategies rely on the reduction of methane (CH4) emissions. Carbon and hydrogen isotope ratio (δ13CCH4 and δ2HCH4) measurements can be used to distinguish sources and thus to understand the CH4 budget better. The CH4 emission estimates by models are sensitive to the isotopic signatures assigned to each source category, so it is important to provide representative estimates of the different CH4 source isotopic signatures worldwide. We present new measurements of isotope signatures of various, mainly anthropogenic, CH4 sources in Europe, which represent a substantial contribution to the global dataset of source isotopic measurements from the literature, especially for δ2HCH4. They improve the definition of δ13CCH4 from waste sources, and demonstrate the use of δ2HCH4 for fossil fuel source attribution. We combined our new measurements with the last published database of CH4 isotopic signatures and with additional literature, and present a new global database. We found that microbial sources are generally well characterised. The large variability in fossil fuel isotopic compositions requires particular care in the choice of weighting criteria for the calculation of a representative global value. The global dataset could be further improved by measurements from African, South American, and Asian countries, and more measurements from pyrogenic sources. We improved the source characterisation of CH4 emissions using stable isotopes and associated uncertainty, to be used in top-down studies. We emphasise that an appropriate use of the database requires the analysis of specific parameters in relation to source type and the region of interest. The final version of the European CH4 isotope database coupled with a global inventory of fossil and non-fossil δ13CCH4 and δ2HCH4 source signature measurements is available at https://doi.org/10.24416/UU01-YP43IN (Menoud et al., 2022a).

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“…Tl is present in the soil in very small amounts; i.e., less than 1 mg/kg [10,12,13], but it is reported to be highly toxic [14][15][16] even more toxic than Hg, Cd, Pb, Cu, and Zn [17,18]. The range of Tl detection in areas of pyrite deposits was from 5 to 15 mg/kg, and near sulfide deposits was from 40 to 124 mg/kg [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Toxic Effects of Thallium on Biological Indicators of Haplic Chernozem Health: A Case Study

et al. 2021

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Thallium (Tl) was introduced into Haplic Chernozem in the amounts of 3, 30, and 300 mg/kg, and biological indicators were observed at 10, 30, and 90 days after incubation in the laboratory experiment. An increase in biological activities; i.e., the total number of bacteria, Azotobacter spp. abundance, enzymes (catalase, dehydrogenases), and phytotoxic indicators (germination rate of radish) after 30 days of Tl exposure were noted. The total number of bacteria and Azotobacter spp. abundance, enzyme activity, and phytotoxicity were more sensitive (16–76%) and informative (12–65%) indicators compared to the control, respectively. Integral biological indicators of soil state (IIBS) noted at 10, 30, and 90 days decreased at a dose of 30 and 300 mg/kg by 13–43% in relation to the control. An increase in Tl concentration and duration of exposure (up to 90 days) inhibited biological properties and caused ecotoxicological effects, respectively. We concluded that the use of individual indicators served as an indicator of the state of the soil.

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CH4 isotopic signatures of emissions from oil and gas extraction sites in Romania

Cited by 11 publications

References 98 publications

Effects of dietary compound acidifiers supplementation on growth performance and intestinal health of juvenile American eels (Anguilla rostrata) cultured in cement tanks

Effects of dietary compound acidifiers supplementation on growth performance and intestinal health of juvenile American eels (Anguilla rostrata) cultured in cement tanks

New contributions of measurements in Europe to the global inventory of the stable isotopic composition of methane

Toxic Effects of Thallium on Biological Indicators of Haplic Chernozem Health: A Case Study

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