Effect of Carbon Content in Wheat Straw Biochar on N2O and CO2 Emissions and Pakchoi Productivity Under Different Soil Moisture Conditions

Sustainability, Journal Year: 2023, Volume and Issue: 15(6), P. 5100 - 5100

Published: March 14, 2023

Agricultural soils are a primary source of greenhouse gas (GHG) emissions. Biochar is commonly used as soil amendment to prevent climate change by reducing GHG production, increasing carbon storage, improving moisture retention, and enhancing crop productivity. However, the impact biochar’s content under subsurface drip irrigation (SDI) has not been well studied. Here, we investigated effect different (C) contents in wheat biochar SDI depths on nitrous oxide (N2O), dioxide (CO2), distribution, Pakchoi A pot experiment was conducted using three depths, emitters buried at 0.05, 0.10, 0.15 m below soil’s surface, levels C named zero (CK), 50% (low (L)), 95% (high (H)) cultivation. The findings showed significantly decreased N2O CO2 Compared CK, L H treatments (18.20, 28.14%), (16.65, 17.51%), 11.05, 18.65%) SDI5, SDI10, SDI15, respectively. Similarly, (8.05, 31.46%), (6.96, 28.88%), (2.97, 7.89%) increased content. All plant growth parameters yield traits were enhanced SDI5. In summary, addition emissions compared performance yield, maintained treatment reduced emissions, treatment. Soil vertically horizontally with radial distance from emitter.

Language: Английский

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Highly effective adsorption and passivation of Cd from wastewater and soil by MgO- and Fe3O4-loaded biochar nanocomposites

Frontiers in Environmental Science, Journal Year: 2023, Volume and Issue: 11

Published: Aug. 9, 2023

Introduction: The application of Fe- (BC-Fe) and Mg-modified (BC-Mg) biochars for the remediation heavy-metal-contaminated soil has become a research hotspot in recent years. It is critical to select suitable biochar rejuvenation under same pollution condition. Methods: In this study, were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM). addition, adsorption passivation effects BC-Fe BC-Mg comprehensively evaluated through batch experiments incubation experiments, Cd-contaminated on plant growth also demonstrated pot experiments. Results: SEM, FTIR, XRD showed that MgO Fe 3 O 4 nanoparticles successfully loaded surface. maximum efficiencies Cd 52.63 66.23 mg g −1 , which was 9.05 7.19 times higher than original (7.32 ), respectively. Soil culture experiment 5% significantly reduced DTPA-Cd content 38.86% 50.85% at 120 days, promoted conversion acid-soluble oxidizable residual states. Pot revealed shoots maize 3.97 6.09 times, respectively, both increased dry fresh weights roots plants. Moreover, BC, BC-Fe, provided nutrients required activities dehydrogenase, urease, peroxidase. adsorption–passivation mechanism mainly included electrostatic attraction, while precipitation ion exchange. Discussion: Overall, results can be used as an efficient functional material heavy-metal remediation, study guidance selection passivator materials remediation.

Language: Английский

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Polycyclic Aromatic Hydrocarbons Occurrences in Biomass Char and Its Mitigation Approaches: A Mini Review

ChemBioEng Reviews, Journal Year: 2023, Volume and Issue: 10(4), P. 462 - 479

Published: July 7, 2023

Abstract Biochar is a porous fine‐grained substance produced from the pyrolysis technology of biomass that can be commercially used as soil conditioner to promote fertility. characterized by high carbon content, stability, and porosity. However, organic pollutants residue polycyclic aromatic hydrocarbons (PAHs) also formed during biochar. The concentration PAHs adversely degrades quality biochar for amendment application. Meanwhile, highly toxic‐PAHs may pose potential threat both human health environment. total yield mainly influenced condition feedstock resource. This review aims discuss conversion factors influence formation. key research findings this literature will lead some strategies minimize compound in controlling conditions through higher temperature, carrier gas flow, prolonged time or selecting suitable with lower lignin content.

Language: Английский

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Biochar alters the soil microbiological activity of sugarcane fields over time

Scientia Agricola, Journal Year: 2024, Volume and Issue: 81

Published: Jan. 1, 2024

Language: Английский

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Biochar influences phytoremediation of heavy metals in contaminated soils: an overview and perspectives

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(52), P. 61397 - 61425

Published: Oct. 24, 2024

Language: Английский

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