Clay-hydrochar composites mitigated CH4 and N2O emissions from paddy soil: A whole rice growth period investigation

Li, Huiting; Chen, Danyan; Xue, Lihong; He, Huayong; Feng, Yanfang; Yang, Ji; Yang, Linzhang; Chu, Qingnan

doi:10.1016/j.scitotenv.2021.146532

Cited by 27 publications

(11 citation statements)

References 48 publications

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“…The NPC and NHC treatments significantly increased the root activity by 1.8-fold and 2.6-fold, TAA by 1.89-fold and 1.77-fold, and AAA by 2.07-fold and 1.94-fold, compared to the control, respectively (Figure 6d−f). Incorporating oxygen nanobubbles into soil stimulated root development, agreeing with previous studies' work on oxygen nanobubble-loaded zeolite application to stimulate root activity of rice 19 and plant growth. 69 Stimulated root respiration via oxygen released from ONBC might be responsible for improving root activity.…”

Section: Acs Sustainablesupporting

confidence: 90%

“…The maximum likelihood method was implemented to assess the parameters, where the optimal Pvalue > 0.05 represented data that were not significantly different from the equation model. 19 The primary factors affecting Cu accumulation in shoots were iron plaque (−1.552, P < 0.01), bacterial genes involved in Cu stabilization (−0.597, P < 0.05), and soil pH (−0.316, P < 0.01) (Figure 7a). These all showed significant correlations and inhibitory roles in Cu accumulation in shoots.…”

Section: Acs Sustainablementioning

confidence: 99%

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Oxygen Nanobubble-Loaded Biochars Mitigate Copper Transfer from Copper-Contaminated Soil to Rice and Improve Rice Growth

Chu

Sha

Feng

et al. 2023

ACS Sustainable Chem. Eng.

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Copper (Cu)-contaminated paddy soil has caused substantial concerns for human health through biomagnification in the soil–rice–human chain. In this study, oxygen nanobubble-loaded biochars (ONBC), including pyrochars (NPC) and hydrochars (NHC), were used to amend Cu-contaminated paddy soils and reduce rice Cu toxicity. The ONBC amendment improved the rhizospheric redox potential and dissolved oxygen concentration via slow, continuous oxygen release, promoting root iron plaque formation and effectively inhibiting root Cu influx. Moreover, the ONBC amendment improved soil microbial diversity. The abundance of bacterial genes involved in cytosolic Cu complexation and Cu export to the periplasm space for Cu stabilization markedly improved. The sequestered Cu in root iron plaque and soil bacteria inhibited Cu influx into the shoots to avoid Cu overaccumulation in the edible parts. This was reflected by the Cu content decreasing by 1.91-fold and 2.38-fold in shoots under NPC and NHC treatments, respectively. Furthermore, the improved oxygen-enriched rhizosphere environment via the ONBC amendment promoted root activity and the abundance of bacterial genes involved in nutrients mineralization, further promoting shoot biomass by 1.46-fold and 2.29-fold under NPC and NHC treatments, respectively. This study proposes an environmentally friendly strategy to mitigate Cu transfer from soil to crops and improve crop productivity.

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Section: Acs Sustainablesupporting

confidence: 90%

Section: Acs Sustainablementioning

confidence: 99%

Oxygen Nanobubble-Loaded Biochars Mitigate Copper Transfer from Copper-Contaminated Soil to Rice and Improve Rice Growth

Chu

Sha

Feng

et al. 2023

ACS Sustainable Chem. Eng.

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“…15 Specifically, biochar and hydrochar addition alters the composition of soil organic carbon (SOC) though physical mixing. 16 Such amendments could also mitigate CO 2 , CH 4 , and N 2 O emissions, 17 thereby affecting biogeochemical cycles and carbon neutrality. Therefore, applying biochar and hydrochar prepared from agricultural waste to achieve carbon neutrality has important value.…”

Section: ■ Introductionmentioning

confidence: 99%

Biochar and Hydrochar from Agricultural Residues for Soil Conditioning: Life Cycle Assessment and Microbially Mediated C and N Cycles

Wang

Shao

et al. 2022

ACS Sustainable Chem. Eng.

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Value-added biochar or hydrochar converted from agricultural waste has the potential to improve soil performance. However, how biochar and hydrochar addition affect ecological responses is not clear. Here, we examined the physicochemical property of biochar and hydrochar from straw (RS) and manure (SM), identified relevant eco-friendly pretreatment methods through life cycle assessment (LCA) methodology, and investigated their influences on soil properties and C and N cycles. The results showed that biochar prepared at 500 and 700 °C and hydrochar prepared at 250 °C for 4, 6, and 8 h had better physicochemical properties. The LCA results revealed that RBC500, RS250-4, and SM250-4 had lower environmental burdens in the preparation process. Moreover, biochar and hydrochar addition could promote the soil C and N cycles to varying degrees, especially in the case of SM250-4, which could simultaneously promote the degradation of cellulose, lignin, and chitin and reduce the emission of CO2 and N2O. Overall, SM250-4 application had a beneficial effect on carbon neutralization. These novel results compensate for the deficiency of research on the phaeozem improvement effects of biochar and hydrochar.

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“…Similar enrichment of (composted) SS with zeolite brought the higher water-soluble and total macro-nutrient content, as well as lower phytotoxicity of the obtained blended organo-mineral matter [24]. Co-pyrolysis of pre-biochar feedstock and bentonite or kaolin increased chemical and thermal stability, recalcitrancy, aromatic structures in biochar [25,26], other copyrolyzed organo-mineral clays and biochar improved sorption ability of products: the produced biochars efficiently bound ciprofloxacin [27], removed Cr(VI) from aqueous solution [28], mitigated greenhouse gas emissions (GHG) by sorption of CH 4 and N 2 O emitted from soil [29]. Another approach to decrease the toxicity of SS-contaminating heavy metals is co-pyrolysis of SS with other biomass [30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomass

Lónová

Holátko

Hammerschmiedt

et al. 2022

Chem. Biol. Technol. Agric.

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Background Sewage sludge (SS) has been considered a potent source of soil nutrients. However, its direct application to agricultural soils have been discouraged owing to its toxic nature. Therefore, conversion and modification of SS to decrease its toxicity has resulted in advanced methods. Co-pyrolysis of SS with other amendments is an ideal treatment resulting in an environmentally safe and nutrient rich final products with additional properties to sequester carbon. In the present study, a novel biochar was produced through the microwave pyrolysis of SS mixed with zeolite and sawdust. The pyrolysis product was thus characterized for elemental composition, polycyclic aromatic hydrocarbons, via Fourier Transform Infrared Spectroscopy (FTIR), and for its effects on soil microbial characteristics, soil health and plant biomass after soil application. Results Results revealed that, the SS modification resulted in stable product with higher nutrients which further depend on the type and ratio of feedstock used. Its application to soil significantly improved soil chemical and microbiological properties and altered lettuce biomass. Conclusions We concluded that sawdust feedstock promoted nutrient availability in the resulting biochar and induced higher activity of nutrient mineralizing enzymes, whereas zeolite slowed down the release of nutrients from soil and putatively immobilized enzymes. This joint effect of sewage sludge biochar, sawdust and zeolite benefited the plant acquisition of nutrients in comparison with the microbial nutrient uptake. We thus conclude that microwave pyrolyzed SS could be used as a soil enhancer. Graphical Abstract

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Clay-hydrochar composites mitigated CH4 and N2O emissions from paddy soil: A whole rice growth period investigation

Cited by 27 publications

References 48 publications

Oxygen Nanobubble-Loaded Biochars Mitigate Copper Transfer from Copper-Contaminated Soil to Rice and Improve Rice Growth

Oxygen Nanobubble-Loaded Biochars Mitigate Copper Transfer from Copper-Contaminated Soil to Rice and Improve Rice Growth

Biochar and Hydrochar from Agricultural Residues for Soil Conditioning: Life Cycle Assessment and Microbially Mediated C and N Cycles

Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomass

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