Pyrogenic Carbon Promotes Anaerobic Oxidation of Methane Coupled with Iron Reduction via the Redox-Cycling Mechanism

被引:10
作者
Zhang, Xueqin [1 ]
Xie, Mengying [1 ]
Cai, Chen [2 ]
Rabiee, Hesamoddin [1 ,3 ,4 ]
Wang, Zhiyao [1 ]
Virdis, Bernardino [1 ]
Tyson, Gene W. [5 ]
McIlroy, Simon J. [5 ]
Yuan, Zhiguo [6 ]
Hu, Shihu [1 ]
机构
[1] Univ Queensland, Fac Engn Architecture & Informat Technol, Australian Ctr Water & Environm Biotechnol ACWEB, Brisbane, Qld 4067, Australia
[2] Univ Sci & Technol China, Dept Environm Sci & Engn, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China
[3] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia
[4] Univ Southern Queensland, Ctr Future Mat, Springfield, Qld 4300, Australia
[5] Queensland Univ Technol QUT, Translat Res Inst, Ctr Microbiome Res, Sch Biomed Sci, Woolloongabba, Qld 4001, Australia
[6] City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Peoples R China
基金
澳大利亚研究理事会;
关键词
anaerobic oxidation of methane; anaerobic methanotrophic archaea; methane mitigation; extracellular electron transfer; Methanoperedenaceae; EXTRACELLULAR ELECTRON-TRANSFER; CONTAINING FUNCTIONAL-GROUPS; MICROBIAL REDUCTION; ARCHAEAL; BIOCHAR; MICROORGANISMS;
D O I
10.1021/acs.est.3c05907
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Pyrogenic carbon (PC) can mediate electron transfer and thus catalyze biogeochemical processes to impact greenhouse gas (GHG) emissions. Here, we demonstrate that PC can contribute to mitigating GHG emissions by promoting the Fe(III)-dependent anaerobic oxidation of methane (AOM). It was found that the amendment PCs in microcosms dominated by Methanoperedenaceae performing Fe(III)-dependent AOM simultaneously promoted the rate of AOM and Fe(III) reduction with a consistent ratio close to the theoretical stoichiometry of 1:8. Further correlation analysis showed that the AOM rate was linearly correlated with the electron exchange capacity, but not the conductivity, of added PC materials, indicating the redox-cycling electron transfer mechanism to promote the Fe(III)-dependent AOM. The mass content of the C=O moiety from differentially treated PCs was well correlated with the AOM rate, suggesting that surface redox-active quinone groups on PCs contribute to facilitating Fe(III)dependent AOM. Further microbial analyses indicate that PC likely shuttles direct electron transfer from Methanoperedenaceae to Fe(III) reduction. This study provides new insight into the climate-cooling impact of PCs, and our evaluation indicates that the PC-facilitated Fe(III)-dependent AOM could have a significant contribution to suppressing methane emissions from the world's reservoirs.
引用
收藏
页码:19793 / 19804
页数:12
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