Carbon Sequestration Strategies in Soil Using Biochar: Advances, Challenges, and Opportunities

Environmental Science & Technology, Год журнала: 2023, Номер 57(31), С. 11357 - 11372

Опубликована: Июль 26, 2023

Biochar, a carbon (C)-rich material obtained from the thermochemical conversion of biomass under oxygen-limited environments, has been proposed as one most promising materials for C sequestration and climate mitigation in soil. The contribution biochar hinges not only on its fused aromatic structure but also abiotic biotic reactions with soil components across entire life cycle environment. For instance, minerals microorganisms can deeply participate mineralization or complexation labile (soluble easily decomposable) even recalcitrant fractions biochar, thereby profoundly affecting cycling Here we identify five key issues closely related to application review outstanding advances. Specifically, terms use pyrochar, hydrochar, stability soil, effect flux speciation changes emission nitrogen-containing greenhouse gases induced by production application, barriers are expounded. By elaborating these critical issues, discuss challenges knowledge gaps that hinder our understanding provide outlooks future research directions. We suggest combining mechanistic biochar-to-soil interactions long-term field studies, while considering influence multiple factors processes, is essential bridge gaps. Further, standards should be widely implemented, threshold values urgently developed. Also needed comprehensive prospective assessments restricted account contributions contamination remediation, quality improvement, vegetation accurately reflect total benefits

Язык: Английский

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Sewage sludge derived biochar for environmental improvement: Advances, challenges, and solutions

Water Research X, Год журнала: 2023, Номер 18, С. 100167 - 100167

Опубликована: Янв. 1, 2023

With the rapid growth yield of global sewage sludge, rational and effective treatment disposal methods are becoming increasingly needed. Biochar preparation is an attractive option for sludge treatment, excellent physical chemical properties derived biochar make it environmental improvement. Here, current application state was comprehensively reviewed, advances in mechanism capacity water contaminant removal, soil remediation, carbon emission reduction were described, with particular attention to key challenges involved, e.g., possible risks low efficiency. Several new strategies overcoming barriers realize highly efficient improvement highlighted, including modification, co-pyrolysis, feedstock selection pretreatment. The insights offered this review will facilitate further development biochar, towards addressing obstacles its crisis.

Язык: Английский

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Formation of soil organic carbon pool is regulated by the structure of dissolved organic matter and microbial carbon pump efficacy: A decadal study comparing different carbon management strategies

Global Change Biology, Год журнала: 2023, Номер 29(18), С. 5445 - 5459

Опубликована: Июль 9, 2023

To achieve long-term increases in soil organic carbon (SOC) storage, it is essential to understand the effects of management strategies on SOC formation pathways, particularly through changes microbial necromass (MNC) and dissolved (DOC). Using a 14-year field study, we demonstrate that both biochar maize straw lifted ceiling, but different pathways. Biochar, while raising DOC content, decreased substrate degradability by increasing aromaticity. This resulted suppressed abundance enzyme activity, which lowered respiration, weakened vivo turnover ex modification for MNC production (i.e., low pump "efficacy"), led lower efficiency decomposing MNC, ultimately resulting net accumulation MNC. In contrast, incorporation increased content aromaticity DOC. The enhanced nutrient such as total nitrogen phosphorous, stimulated population thereby boosting respiration enhancing "efficacy" production. C added plots were estimated 27.3-54.5 41.4 Mg ha-1 , respectively. Our results demonstrated was more efficient lifting stock via exogenous stable input stabilization, although latter showed "efficacy". Meanwhile, significantly promoted also mineralization, smaller increase (by 50%) compared 53%-102%). address decadal-scale application pool soil, understanding causal mechanisms can allow practices maximize content.

Язык: Английский

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Sewage sludge derived biochar and its potential for sustainable environment in circular economy: Advantages and challenges

Chemical Engineering Journal, Год журнала: 2023, Номер 471, С. 144495 - 144495

Опубликована: Июнь 28, 2023

Язык: Английский

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Biochar from agricultural crop residues: Environmental, production, and life cycle assessment overview

Resources Conservation & Recycling Advances, Год журнала: 2023, Номер 19, С. 200173 - 200173

Опубликована: Июль 18, 2023

In circular economies, it is imperative to implement effective environmental management solutions address resource depletion. Over the past few years, there has been a growing recognition of potential agricultural crop waste in mitigating greenhouse gas (GHG) emissions and promoting global carbon neutrality. Despite lacking practical options, open-field burning residue contributes significantly air pollution. This challenge may be addressed by producing biochar through pyrolysis residues. A application agriculture can contribute reducing warming sequestration atmospheric from soil. As part life cycle assessment biochar, yield during its production are critical factors, which emphasize importance selecting method suitable for biochar. The objective this paper present comprehensive overview agronomic advantages associated with along detailed analysis (LCA). Furthermore, provides an how facilitate local energy sustainable within nexus agroecosystems, environment, energy.

Язык: Английский

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Biomass residue to carbon dioxide removal: quantifying the global impact of biochar

Biochar, Год журнала: 2023, Номер 5(1)

Опубликована: Окт. 11, 2023

Abstract The Climate Change Conference of Parties (COP) 21 in December 2015 established Nationally Determined Contributions toward reduction greenhouse gas emissions. In the years since COP21, it has become increasingly evident that carbon dioxide removal (CDR) technologies must be deployed immediately to stabilize concentration atmospheric gases and avoid major climate change impacts. Biochar is a carbon-rich material formed by high-temperature conversion biomass under reduced oxygen conditions, its production one few CDR methods can at scale large enough counteract effects within next decade. Here we provide generalized framework for quantifying potential contribution biochar make achieving national emissions goals, assuming use only sustainably supplied biomass, i.e., residues from existing agricultural, livestock, forestry wastewater treatment operations. Our results illustrate significant role play world-wide strategies, with 6.23 ± 0.24% total GHG 155 countries covered based on 2020 data over 100-year timeframe, more than 10% 28 countries. Concentrated regions high relative were identified South America, northwestern Africa eastern Europe. Graphical abstract

Язык: Английский

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Biochar from coconut residues: An overview of production, properties, and applications

Industrial Crops and Products, Год журнала: 2023, Номер 204, С. 117300 - 117300

Опубликована: Авг. 14, 2023

Язык: Английский

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Benefits and limitations of biochar for climate-smart agriculture: a review and case study from China

Biochar, Год журнала: 2023, Номер 5(1)

Опубликована: Ноя. 24, 2023

Abstract Biochar has gained significant attention in agricultural and environmental research over the last two decades. This comprehensive review evaluates effects of biochar on soil organic carbon (SOC), emission non-CO 2 greenhouse gases, crop yield, including related mechanisms major influencing factors. The impacts SOC, methane nitrous oxide emissions, yield are controlled by properties management practices. High-temperature produced from lignin-rich feedstocks may decrease emissions acidic soils strengthen long-term sequestration due to its stable aromatic structure. In contrast, low-temperature manure increase low-fertility soils. Applying farmlands China can SOC content 1.9 Pg C reduce 25 20 Mt CO -eq year −1 , respectively, while increasing yields 19%. Despite evidence positive biochar, future needs explore potential factors that could weaken or hinder capacity address climate change secure production. We conclude is not a universal solution for global cropland; however, targeted applications fields, landscapes, regional scales, especially low fertility sandy soils, realize benefits as climate-smart measure. Highlights findings biochar's sequestration, GHG mitigation, production were summarized. impact functioning reviewed. mitigation quantified. Graphical

Язык: Английский

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Pyrogenic organic matter decreases while fresh organic matter increases soil heterotrophic respiration through modifying microbial activity in a subtropical forest

Biology and Fertility of Soils, Год журнала: 2024, Номер 60(4), С. 509 - 524

Опубликована: Март 27, 2024

Язык: Английский

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Effects of microplastics on soil carbon pool and terrestrial plant performance

Carbon Research, Год журнала: 2024, Номер 3(1)

Опубликована: Апрель 19, 2024

Abstract Soil, as a primary repository of plastic debris, faces an escalating influx microplastics. Microplastics have the potential to decrease soil bulk density and pH, well alter pore structure aggregation. These changes in physicochemical properties subsequently lead habitat degradation for microbes environmental shifts that impact plant growth. Masquerading carbon storage, microplastics can distort assessments pool by introducing plastic-carbon associated leachates, influencing organic matter (SOM) turnover through priming effects (e.g., dilution, substrate switching, co-metabolisms). Additionally, influence distribution particulate mineral-associated matter, consequently affecting accumulation stability carbon. Furthermore, also chemodiversity dissolved (DOM) soils increasing DOM aromaticity molecular weight while deepening its humification degree. The observed may be attributed inputs from microplastic-derived along with organo-organic organo-mineral interactions coupled microbial processes. Acting inert source carbon, create distinct ecological niche growth contribute necromass formation pathways. Conventional reduce contribution stable whereas bio-microplastics tend increase it. exert wide range on performance both internal external factors, seed germination, vegetative reproductive growth, inducing ecotoxicity genotoxicity. impacts arise alterations environment or uptake plants. Future research should aim elucidate storage within fractions, paying closer attention rhizosphere dynamics such stabilization mineral protection rhizodeposits soils. Graphical

Язык: Английский

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