Insights into the hydrogen generation from water-iron rock reactions at low temperature and the key limiting factors in the process

Irfan, Muhammad; Zhou, Lei; Bai, Yang; Yuan, Shiwei; Liang, Tian-Tian; Liu, Yifan; Liu, Jin Feng; Yang, Shi‐Zhong; Gu, Ji‐Dong; Mu, Bo‐Zhong

doi:10.1016/j.ijhydene.2019.05.086

Cited by 13 publications

(4 citation statements)

References 77 publications

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“…The bioelectrochemical cell was then connected to the potentiostat station. The cathode potentials were separately set at −750, −800, −850, −900, −950 and −1,000 mV, and each test lasted for 72 h. The gaseous samples were removed from the headspace of the cathode chamber using gas‐tight syringes fitted with needles and analyzed for methane and hydrogen on the Gas‐Chromatography GC‐9890B (Linghua Instrument Co., Ltd, Shanghai) …”

Section: Methodsmentioning

confidence: 99%

Assessment of Five Electron‐Shuttling Molecules in the Extracellular Electron Transfer of Electromethanogenesis by using Methanosarcina barkeri

et al. 2020

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Electron-shuttling molecules (ESMs), natural or synthetic, are utilized by microorganisms as electron acceptors or donors to facilitate electron transfer. In this study, five ESMs, namely anthraquinone-2-carboxylic acid (AQC), 9,10-anthraquinone-2sulfonicacid (AQS), 9,10-anthraquinone-2,6-disulfonic acid (AQDS), Neutral red, and Thionin, were selected to assess their effects on electromethanogenesis under different electrochemical potentials and concentrations. Results showed that the rate of methanogenesis achieved in the presence of AQC was 7.4 times higher than that of the control (without ESMs) at À 850 mV (vs. Ag/AgCl). The effectiveness on methanogenesis followed AQC, Neutral Red, AQS, AQDS, and Thionin in a decreasing order. Compared with the control, the addition of ESMs did not affect the biomass of methanogens significantly. Meanwhile, qPCR analysis of the ccdA gene indicated that the abundance of the Cytochrome c gene and the extent of CO 2 reduction to methane correlated positively. The promoting effect of the selective ESMs on methanogenesis was mainly related to their electron transfer capabilities.

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Section: Methodsmentioning

confidence: 99%

Assessment of Five Electron‐Shuttling Molecules in the Extracellular Electron Transfer of Electromethanogenesis by using Methanosarcina barkeri

et al. 2020

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“…The origins of the hydrogen are most likely attributed to: (A) hydrogen generation from water-rock reactions. The abiotic H 2 is generated by the reaction of water with ultrabasic rocks or serpentinization under near-surface conditions and migration from the deep reservoirs (Lollar et al, 2014;Parnell and Blamey, 2017;Irfan et al, 2019;Wang et al, 2019;, (B) the interaction of water with freshly exposed rock surfaces (Hirose et al, 2011), (C) mixing with the considerable amount of microbial H 2 from the biological activity and decomposition of organic matter (Prinzhofer et al, 2019;Myagkiy et al, 2020).…”

Section: Hmentioning

confidence: 99%

Short-Term Seismic Precursor Anomalies of Hydrogen Concentration in Luojishan Hot Spring Bubbling Gas, Eastern Tibetan Plateau

et al. 2021

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The gas compositions (He, H2, CO2, CH4, Ar and N2) and isotope ratios (3He/4He and δ13C) were yearly investigated from April 2010 to April 2019 at the Luojishan spring located in the proximity of the Zemuhe Fault, eastern Tibetan Plateau. The continuous automatic monitoring of hydrogen concentrations in Luojishan hot spring bubbling gas for the purpose of earthquake prediction requires the discrimination of seismic precursor anomalies. Helium isotope ratios (3He/4He) in the bubbling gas of hot springs varied from 0.05 to 0.18 Ra (Ra = 3He/4He = 1.39 × 10−6 in the air), with a maximum mantle-derived He up to 2.2% of the total He measured in the Luojishan hot spring (assuming R/Ra = 8.0 for mantle). This suggests that Zemuhe Fault might act as a conduit for crustal-derived fluid. N2 concentrations in the majority of the hot spring was ≥80 vol%, and δ13CCO2 values varied from −13.2 to −9.3‰ (vs.PDB). Hydrogen concentration time series display a complex temporal pattern reflecting a wide range of different physical processes. There were short-term (5–60 h) seismic precursor anomalies of hydrogen concentration before natural earthquake. The anthropogenically-induced earthquakes provoke only post-earthquake responses. The concentration of hydrogen in bubbling gas of the Luojishan hot spring is sensitive to increase of stress in the Xianshuihe-Xiaojiang fault system. Monitoring the hydrogen concentrations with automatic gas stations may be promising tool for unraveling earthquake mechanisms and for predicting earthquakes.

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“…The ferrozine spectrophotometric method was used to measure Fe 2+ and Fe 3+ in the liquid samples 4 , 47 , 48 . The method measures the concentration of Fe 2+ based on the measurement of Fe 2+ –ferrozine complex formed from the reaction of Fe 2+ with ferrozine.…”

Section: Methodsmentioning

confidence: 99%

Tectonically-driven oxidant production in the hot biosphere

et al. 2022

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Genomic reconstructions of the common ancestor to all life have identified genes involved in H2O2 and O2 cycling. Commonly dismissed as an artefact of lateral gene transfer after oxygenic photosynthesis evolved, an alternative is a geological source of H2O2 and O2 on the early Earth. Here, we show that under oxygen-free conditions high concentrations of H2O2 can be released from defects on crushed silicate rocks when water is added and heated to temperatures close to boiling point, but little is released at temperatures <80 °C. This temperature window overlaps the growth ranges of evolutionary ancient heat-loving and oxygen-respiring Bacteria and Archaea near the root of the Universal Tree of Life. We propose that the thermal activation of mineral surface defects during geological fault movements and associated stresses in the Earth’s crust was a source of oxidants that helped drive the (bio)geochemistry of hot fractures where life first evolved.

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Insights into the hydrogen generation from water-iron rock reactions at low temperature and the key limiting factors in the process

Cited by 13 publications

References 77 publications

Assessment of Five Electron‐Shuttling Molecules in the Extracellular Electron Transfer of Electromethanogenesis by using Methanosarcina barkeri

Assessment of Five Electron‐Shuttling Molecules in the Extracellular Electron Transfer of Electromethanogenesis by using Methanosarcina barkeri

Short-Term Seismic Precursor Anomalies of Hydrogen Concentration in Luojishan Hot Spring Bubbling Gas, Eastern Tibetan Plateau

Tectonically-driven oxidant production in the hot biosphere

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