PNAS Nexus
·
2023
·Vol. 2
·期 11
·
IF 0
Ge Qiuyue,Liu Yangyang,You Wenbo,Wang Wei,Li Kejian,Ruan Xuejun,Xie Lifang,Wang Tao,Zhang Liwu
The origin of life on Earth is an enigmatic and intricate conundrum that has yet to be comprehensively resolved despite recent significant developments within the discipline of archaeology and geology. Chemically, metal-sulfide minerals are speculated to serve as an important medium for giving birth in early life, while yet so far direct evidence to support the hypothesis for the highly efficient conversion of inorganic carbon into praxiological biomolecules remains scarce. In this work, we provide an initial indication that sphalerite, employed as a typical mineral, shows its enormous capability for promoting the conversion of inorganic carbon into elementary biomolecule formic acid (HCOOH) in airborne mineral-bearing aerosol microdroplet, which is over two orders of magnitude higher than that of the corresponding conventional bulk-like aqueous phase medium in the environment (e.g. river, lake, sea, etc.). This significant enhancement was further validated by a wide range of minerals and clays, including CuS, NiS, CoS, CdS, MnS, elemental sulfur, Arizona Test Dust, loess, nontronite, and montmorillonite. We reveal that the abundant interface of unique physical–chemical features instinct for aerosol or cloud microdroplets reduces the reaction energy barrier for the reaction, thus leading to extremely high HCOOH production (2.52 × 1014 kg year−1). This study unfolds unrecognized remarkable contributions of the considered scheme in the accumulation of prebiotic biomolecules in the ancient period of the Earth.
研究领域:
化学
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生物学
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地球科学
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DOI
PubMed
International Journal of Environmental Research and Public Health
·
2023
·Vol. 20
·期 6
·5047
·
IF 4.614
Lei Liao,Bin Chen,Kaikai Deng,Qiang He,Guijiao Lin,Jinsong Guo,Peng Yan
Algae–bacteria systems are used widely in wastewater treatment. N-hexanoyl-L-homoserine lactone (AHL) plays an important role in algal-bacteria communication. However, little study has been conducted on the ability of AHLs to regulate algal metabolism and the carbon fixation ability, especially in algae–bacteria system. In this study, we used theMicrocystis aeruginosa + Staphylococcus ureilyticusstrain as a algae–bacteria system. The results showed that 10 ng/L C6-HSL effectively increased the chlorophyll-a (Chl-a) concentration and carbon fixation enzyme activities in the algae–bacteria group and algae group, in which Chl-a, carbonic anhydrase activity, and Rubisco enzyme increased by 40% and 21%, 56.4% and 137.65%, and 66.6% and 10.2%, respectively, in the algae–bacteria group and algae group, respectively. The carbon dioxide concentration mechanism (CCM) model showed that C6-HSL increased the carbon fixation rate of the algae–bacteria group by increasing the CO2transport rate in the water and the intracellular CO2concentration. Furthermore, the addition of C6-HSL promoted the synthesis and secretion of the organic matter of algae, which provided biogenic substances for bacteria in the system. This influenced the metabolic pathways and products of bacteria and finally fed back to the algae. This study provided a strategy to enhance the carbon fixation rate of algae–bacteria consortium based on quorum sensing.Keywords:algae–bacteria system;C6-HSL;inorganic carbon;CCM model;carbon fixation capacity
研究领域:
微生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Yanxia Zhu,Jun Cheng,Xiaodan Xu,Hongxiang Lu,Yangang Wang,Xi Li,Weijuan Yang
CO 2 capture with microalgae has been put forward in response to global concern on greenhouse gas emission . However, the short residence time and slow diffusion of CO 2 in water limits the growth of microalgae. In order to improve CO 2 transfer from gas phase to liquid phase and utilization by algal cells, polyethylene glycol 200 (PEG 200) was used as CO 2 absorbent to promote growth of Nannochloropsis oceanica with the bubbling of 15 vol% CO 2 . Total inorganic carbon (TIC) absorbed in culture medium remained constant at 5.6 mM when 15 vol% CO 2 was bubbled continuously. PEG 200 in the medium provided additional CO 2 absorption from 0.6 to 4.8 mM when PEG 200 concentration increased from 0.5 to 4 mM. The specific growth rate of N. oceanica reached the maximum (1.41 d −1 ) with 1 mM PEG 200 in culture medium, which was 21.5% higher than the specific growth rate without PEG 200. About 79% of the increase in biomass was attributed to the increased TIC with more CO 2 dissolution in culture medium because of PEG 200, and about 21% was attributed to PEG 200 itself utilized as an organic carbon source. In conclusion, PEG 200 as a CO 2 absorbent can effectively capture flue-gas CO 2 for algal growth.
研究领域:
环境科学
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生物技术
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藻类研究
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产品关联
DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 6
·1-14
·
IF 6.4
Zhang Tengyu,Zhang Jingxin,Zhang Pengshuai,Tong Yen Wah,He Yiliang,Yang Qing
Anaerobic digestion (AD) is a commonly used technology for facilitating carbon fixation by converting complex organic matter into volatile fatty acids and CH 4 ; however, the issue of CO 2 emission remains unresolved in AD. The formation of amorphous carbon has been identified as a more direct method of carbon fixation in AD. This study aimed to elucidate how amorphous carbon can be formed from organic matter or CO 2 by anaerobic microorganisms. The results showed that amorphous carbon was produced in the anaerobic digestion of inorganic and mixed carbon sources, with yields of 0.38 and 3 µg/10 5 cells, respectively. Its characteristics were analyzed using Raman microscopy. Isotope labeling revealed that CO 2 fixation into amorphous carbon primarily depends on the reversed oxidative tricarboxylic acid cycle (roTCA) and hydroxycaproate. Differential pulse voltammetry combined with gene abundance analysis indicated that flavin electron bifurcation (EB) is involved in electron transfer. The microbial isothermal calorimeter further measured the metabolic calorific value, demonstrating that anaerobic microorganisms can autotrophically fix CO 2 with energy provided by EB. Metagenomic analysis supported the large REDOX equivalents input from EB to sustain the roTCA cycle. This research contributes to understanding the mechanism of CO 2 fixation into solid carbon in anaerobic environments. Additionally, it provides new insights into the potential development of carbon-negative technologies in anaerobic biological treatment.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
PLANT SCIENCE
·
2025
·
IF 4.1
Zhizhuo Shao,Menglin Guo,Hong Wang,Wenhui Gu,Xiujun Xie,Guangce Wang
Pyropia yezoensis is an important intertidal economic macroalgae, which is periodically affected by various stresses, such as the limitation of inorganic carbon (C i ) deficiency. Under such environment, the redox homeostasis within the cells of Pyropia yezoensis is seriously affected, and the reactive oxygen species (ROS) signal transduction system would be activated to regulate the photosynthetic activity. Therefore, how P. yezoensis manage ROS to maintain effective photosynthetic carbon fixation has aroused great interest. Here, we characterize transformants overexpressing respiratory burst oxidase homolog ( Rboh ), an important gene that can actively produce ROS, at the levels of cellular physiology, biochemistry, and transcriptomics. Our data indicated the expression of Rboh significantly increased, accompanied by a significant upregulated expression of alpha-type carbonic anhydrase 3 (α CA3 ) and increased extracellular carbonic anhydrase activity in the Rboh overexpressing strains. Interestingly, compared with the wild type, the photosynthetic activity of transgenic strains was significantly higher under the low C i and high light condition, implying that the ROS signal triggered by overexpression of Rboh was involved in regulating the C i absorption and utilization in P. yezoensis when the C i source was limited. In summary, this study provided evidence supporting the correlation between the ROS production and the Ci utilization under stress environments in P. yezoensis .
研究领域:
海洋生物学
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植物生理学
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分子遗传学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·Vol. 9
·期 4
·105785
·
IF 5.909
Jinjia Guo,Yongmei Wang,Zhao Luo,Feng Zhang,Dewang Yang
Carbon cycle in coastal water is a significant dynamic component of global carbon budget , however, the diverse sources, carbon sinks and their complex interactions remained poorly understood. In order to detect the dissolved inorganic carbon (DIC) and their interactions, gas-liquid Raman spectroscopy was built and applied to simultaneously detect the constituents of air, dissolved CO 2 , HCO 3 - and chlorophyll in coastal water. The linear fitting curve between peak intensity and concentration was built for the quantitative analysis of HCO 3 - and CO 2 , meanwhile, the fluorescence peaks of chlorophyll at 679 nm were detected for the qualitative analysis. For the multi-components analysis, typical Raman spectra of the constituents of air, dissolved CO 2 , HCO 3 - in seawater, and the fluorescence spectra of chlorophyll in seawater were detected. Results showed that the time dependent change of CO 2 and O 2 in the air exhibited a contrary tendency, while that of dissolved CO 2 and O 2 was curved like a cosine. The changing tendency of relative concentrations of dissolved CO 2 was about 2 h earlier than CO 2 in air, due to the life activity of microorganisms driving the gas exchange at the air-sea interface. Furthermore, the study makes a study on the relationship between DIC and chlorophyll based on the detection of HCO 3 - and chlorophyll in coastal water, indicating that this gas-liquid Raman spectroscopy could successfully provide real-time analysis of multicomponent DIC in the air-sea exchanging process.
研究领域:
海洋化学
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环境光谱学
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碳循环
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分析化学
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生物地球化学
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DOI
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2024
·
IF 11.2
Weizhong Huo,Tong Hu,Yuchao Shao,Rong Ye,Ajmal Muhammad,Wenjing Lu
In this study, the role of inorganic carbon in chain elongation fermentation was investigated by examining its effects at different carbonate concentrations. The results demonstrated that higher yield of caproate (6.3±0.3 g/L - 7.4±0.2 g/L) was achieved with a NaHCO 3 concentration of 2.5-5.0 g/L. Building upon these findings, a chain elongation process for food waste was developed. The caproate productions of control, CO 2 and Na 2 CO 3 trials were 4.6±0.2 g/L, 7.3±0.1 g/L, and 8.3±0.2 g/L, respectively. Chain elongation fermentation of food waste (1t TS) with Na 2 CO 3 enhancement could synthesize 116.9 kg of caproate and 72.5 kg of carbon could be converted in caproate, accounting for 15.5% of the total organic carbon in the food waste. This study provided a comprehensive exploration of the chain elongation process for food waste, offering insights for further optimization and enhancement of food waste chain elongation performance coupling inorganic carbon utilization.
研究领域:
环境工程
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生物技术
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废物管理
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 16
·20936-20945
·
IF 2.478
Yu Jiatao,Li Wenhui,Zhang Kunming,Han Xiuxun
The CsPbI 2 Br perovskite solar cells (PSCs) based on the carbon electrodes are considered as promising photovoltaic devices with low cost and excellent thermal stability. Although the power conversion efficiency (PCE) has made remarkable progress, recombination originating from surface defect states of perovskite is still serious. In this work, CsPbI 2 Br layer was treated by n-propyltrimethoxysilane (NPTMS) before covering carbon electrode, and effects of NPTMS modification on the microstructure and optoelectronic properties of CsPbI 2 Br films were systematically studied. We found that NPTMS effectively passivated the CsPbI 2 Br surface states and inhibited nonradiative recombination via the strong coordination of O atom with the surface atoms. As a result, the power conversion efficiency of the CsPbI 2 Br perovskite solar cell increased from 8.78 to 10.22%.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）