Biochar dose determines methane uptake and methanotroph abundance in Haplic Luvisol

Kubaczyński, Adam; Walkiewicz, Anna; Pytlak, Anna; Grządziel, Jarosław; Gałązka, Anna; Brzezińska, Małgorzata

doi:10.1016/j.scitotenv.2021.151259

Cited by 23 publications

(11 citation statements)

References 91 publications

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“…As shown in Figure 3c,d, Methylocystis in biofilm and planktonic cells, respectively, contributed 42.08% and 23.58% to methane metabolism, which was different from previously reported microbes in AMO‐BESs (Bordel et al, 2019; Kubaczyński et al, 2022). Interestingly, Methylocystis not only made the greatest contribution to nitrate reduction in the cathodic chamber but also played an irreplaceable role in methane metabolism in the anodic chamber.…”

Section: Resultscontrasting

confidence: 83%

“…For example, the nitrite accumulation percentage (the ratio of nitrite production to nitrate removal) was up to (89.51 ± 4.39%) when the DAMO-BES were operated with 50 mmol/L phosphate buffer solution at pH 7 and 30 C. According to the abundance of functional enzyme genes and the nitrite accumulation phenomena, it was speculated that most NO 3 À was reduced to NO 2 À , accompanied by a little N 2 O and N 2 (Figure 4a). As shown in Figure 3c,d, Methylocystis in biofilm and planktonic cells, respectively, contributed 42.08% and 23.58% to methane metabolism, which was different from previously reported microbes in AMO-BESs (Bordel et al, 2019;Kubaczy nski et al, 2022). Interestingly, Methylocystis not only made the greatest contribution to nitrate reduction in the cathodic chamber but also played an irreplaceable role in methane metabolism in the anodic chamber.…”

Section: Metagenomics Profilecontrasting

confidence: 73%

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Simultaneous denitrification and electricity generation in a methane‐powered bioelectrochemical system

Chen

Guo

Zhang

et al. 2023

Water Environment Research

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Bioelectrochemical system is a novel method for controlling down nitrate pollution, yet the feasibility of using methane as the electron donors for denitrification in this system remains unknown. In this study, using the effluent from mother BESs as inocula, a denitrifying anaerobic methane oxidation bioelectrochemical system was successfully started up in 92 days. When operated with 50 mmol/L phosphate buffer solution at pH 7 and 30°C, the maximum methane consumption, nitrate, and total nitrogen removal load reached 0.23 ± 0.01 mmol/d, 551.0 ± 22.1 mg N/m3/d, and 64.0 ± 18.8 mg N/m3/d, respectively. Meanwhile, the peak voltage of 93 ± 4 mV, the anodic coulombic efficiency of 6.99 ± 0.20%, and the maximum power density of 219.86 mW/m3 were obtained. The metagenomics profiles revealed that the dominant denitrifying bacteria in the cathodic chamber reduced most nitrate to nitrite through denitrification and assimilatory reduction. In the anodic chamber, various archaea including methanotrophs and methanogens converted methane via reverse methanogenesis to form formate (or H2), acetate, and methyl compounds, which were than utilized by electroactive bacteria to generate electricity.Practitioner Points A denitrifying anaerobic methane oxidation BES was successfully started up in 92 d. Simultaneous removal of methane and nitrate was achieved in the DAMO‐BES. Functional genes related to AMO and denitrification were detected in the DAMO‐BES. Methylocystis can mediate AMO in the anode and denitrification in the cathode.

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Section: Resultscontrasting

confidence: 83%

Section: Metagenomics Profilecontrasting

confidence: 73%

Simultaneous denitrification and electricity generation in a methane‐powered bioelectrochemical system

Chen

Guo

Zhang

et al. 2023

Water Environment Research

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“…For CH 4 , because paddy soil is the main source of CH 4 emissions, most previous studies on CH 4 emissions were conducted in paddy soil, and it has mostly been found that biochar addition inhibited soil CH 4 emissions [23][24][25]. However, some studies have also found that biochar addition promoted CH 4 emissions [26,27].…”

Section: Introductionmentioning

confidence: 99%

Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Zhou

et al. 2023

IJERPH

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Biochar addition has been recommended as a potential strategy for mitigating climate change. However, the number of studies simultaneously investigating the effects of biochar addition on CO2, N2O and CH4 emissions and sequentially global warming potential (GWP) is limited, especially concerning its effect on native soil organic carbon (SOC) mineralization. An incubation experiment was conducted to investigate soil physicochemical properties, CO2, N2O and CH4 emissions and GWP in the treatments with 0% (CK), 1% (BC1) and 4% (BC4) cornstalk biochar additions, and clarify the priming effect of biochar on native SOC mineralization by the 13C tracer technique. Generally, biochar addition increased soil pH, cation exchange capacity, SOC and total nitrogen, but decreased NH4+-N and NO3--N. Compared with CK, BC1 and BC4 significantly reduced CO2 emissions by 20.7% and 28.0%, and reduced N2O emissions by 25.6% and 95.4%, respectively. However, BC1 significantly reduced CH4 emission by 43.6%, and BC4 increased CH4 emission by 19.3%. BC1 and BC4 significantly reduced the GWP by 20.8% and 29.3%, but there was no significant difference between them. Biochar addition had a negative priming effect on native SOC mineralization, which was the reason for the CO2 emission reduction. The negative priming effect of biochar was attributed to the physical protection of native SOC by promoting microaggregate formation and preferentially using soluble organic carbon in biochar. The N2O emission decrease was rooted in the reduction of nitrification and denitrification substrates by promoting the microbial assimilation of inorganic nitrogen. The inconsistency of CH4 emissions was attributed to the different relative contributions of CH4 production and oxidation under different biochar addition ratios. Our study suggests that 1% should be a more reasonable biochar addition ratio for mitigating greenhouse gas emissions in sandy loam, and emphasizes that it is necessary to furtherly investigate nitrogen primary transformation rates and the relative contributions of CH4 production and oxidation by the 15N and 13C technique, which is helpful for comprehensively understanding the effect mechanisms of biochar addition on greenhouse gas emissions.

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“…In the first few months of the experiment, biochar could produce a positive priming effect of SOC in the inceptisol, while it changed to a negative priming effect with increasing time in entisol, oxisol, and vertisol; incubation temperature was the key factor affecting the aging biochar, and the negative priming effect was more significant in the biochar under high temperature aging. Kubaczynski et al [31] prepared woody biochar at lower temperatures (350°C-400°C), with Haplic Luvisol soil and a biochar application dosage of 0-30 Mg/ha, and the following conclusions were drawn from 5 years of experimental observations. The addition of fresh biochar increased redox potential (Eh), soil pH, DOC concentration, and SOC concentration.…”

Section: Long-term Resultsmentioning

confidence: 99%

Effect of Biochar on the Stability of Soil Organic Carbon in the Context of Global Warming

Yuan¹

2023

HSET

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Since the industrial revolution, the mean global temperature has increased by more than 0.6°C, and this has led to serious ecoenvironmental problems, such as melting ice sheets, retreating glaciers, species extinction and extreme weather-climate events, which have substantially affected human social life. The issue of how to reduce global warming has become a worldwide concern. Soil is one of the primary carbon emission sources, and maintaining the stability of soil organic carbon (SOC) plays a crucial part in reducing soil carbon emission. Soil-biochar has great potential as a natural carbon sequestration solution. Biochar produces positive/negative stimulation effects on soil organic carbon when applied to soil. In this review, the direct and indirect effects of biochar on the soil environment are described, with a focus on priming effects and influencing factors of biochar. In terms of direct effects, biochar and its surface dissolved organic carbon can directly replenish the organic carbon source required by the soil carbon cycle. In terms of indirect effects, biochar can influence SOC mineralization by affecting the species, number, and activity of microorganisms in soil. Soil properties, vegetation type, biochar raw material, and pyrolysis temperature as well as their aging effects are the key factors affecting soil-biochar carbon sequestration. This review will contribute to the understanding of the contribution of biochar to the reduction of soil emissions.

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Biochar dose determines methane uptake and methanotroph abundance in Haplic Luvisol

Cited by 23 publications

References 91 publications

Simultaneous denitrification and electricity generation in a methane‐powered bioelectrochemical system

Simultaneous denitrification and electricity generation in a methane‐powered bioelectrochemical system

Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Effect of Biochar on the Stability of Soil Organic Carbon in the Context of Global Warming

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