Biochar for Soil Carbon Sequestration: Current Knowledge, Mechanisms, and Future Perspectives

Li, Simeng; Tasnady, Desarae

doi:10.3390/c9030067

Cited by 31 publications

(12 citation statements)

References 163 publications

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“…The ratios of H/C and O/C have often been used as the thermal stability indices of biochar [40][41][42]. The H/C and O/C ratios of the 400 • C and the 600 • C biochars (Table 1) were not significantly different and their values were within the highly condensed charcoal region of the van Krevelen plot [31,32].…”

Section: Discussionmentioning

confidence: 99%

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Carbon Mineralization Dynamics of Switchgrass (Panicum virgatum) Biochar in a Northern Florida Soil

Hsieh,

Hatakka

2024

Sustainability

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Biochar has been considered one of the viable solutions for atmospheric carbon sequestration because of its resistance to mineralization in soils. However, our knowledge of the mineralization rates of biochar in soils is still inconclusive due to the drawbacks of either the study methods or insufficient characterization of the studied materials or both. The objectives of this study were (1) to characterize switchgrass (SG) biochar by multi-element scanning thermal analysis (MESTA), and (2) to determine the mineralization rates of the SG biochar carbon (BC) in soil by the 13C tracer method. The results indicated that the 400 °C and the 600 °C SG biochars were not significantly different in chemical composition or thermal stability. A MESTA thermogram of the SG feedstock can predict the yield and thermal stability of the resulting biochar. The 13C tracer determined the mineralization rates and deduced the corresponding mean residence times (MRTs) of the BC, SG-C, and native SOC to be 347 years, 4 years, and 65 years, respectively. The MRT of BC should be a minimal estimate because of the limited incubation period. Even so, the MRT was already two orders of magnitude greater than that of the SG feedstock indicating the carbon sequestration potential of the biochar in soil.

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Section: Discussionmentioning

confidence: 99%

“…Since biochar may exhibit a range of properties, it is important to characterize biochar sufficiently in order to compare the results among various studies. The common indices that characterize the stability of biochar in soils have been the H/C and O/C ratios [19,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Carbon Mineralization Dynamics of Switchgrass (Panicum virgatum) Biochar in a Northern Florida Soil

Hsieh,

Hatakka

2024

Sustainability

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“…The aromatic nature of SCB-750 composed of a larger proportion of π electron rings (donor) and showed stronger affinity toward p-amino sulfonamide aromatic rings of SMX molecule rings (acceptor) via π -π EDA interactions. 101,102 Further, the pH of the solution was a major decisive parameter for SMX removal which ultimately revealed the role of electrostatic interaction as a mechanism route. 103 Specifically, at a pH < pH zpc and pH > 7, the predominated electrostatic repulsive forces hindered the SMX removal rate owing to similar charge over SCB-750 and SMX molecules.…”

Section: Reusability and Regenerationmentioning

confidence: 99%

Unveiling Biochar Quality Index: A Factor Analysis Mediated Ranking Approach to Select Best Ranked Biochar for Adsorptive Removal of Sulfamethoxazole

Chauhan,

Taksal,

Chowdhury

et al. 2024

Ind. Eng. Chem. Res.

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In recent times, biochars have been synthesized for multiple applications, yet the global biochar industry lacks a standardized quantitative framework for assessing quality, particularly for the abatement of emerging contaminants from aqueous environments via adsorption. The present study establishes a first of its kind effort to construct a Biochar Quality Index (BCQI) using five distinct agroforestry waste biomasses with its application focused on the adsorptive removal of a model sulfonamide antibiotic, i.e., sulfamethoxazole (SMX). Physicochemical attributes of biochars synthesized at 550 °C, 650 °C, and 750 °C were quantified using selected parameters. Through correlation analysis, parameter selection was executed, followed by weight derived through factor analysis (FA). The BCQI scores were then arithmetically aggregated for biochar ranking and categorization. The FA results indicate that sugarcane bagasse biochar prepared at 750 °C (SCB-750) ranks highest, scoring 84.39, while rice husk biochar prepared at 550 °C ranks lowest with a BCQI score of 18.34. The BCQI calculations were further verified via batch adsorption experiments for SMX removal. The maximum SMX removal and adsorption capacity obtained by SCB-750 were 71.77% and 35.09 mg g −1 , respectively, at 10 mg L −1 initial SMX concentration and 0.8 g L −1 dose. Additionally, the kinetics and isotherm studies along with the effect of water chemistry operational parameters and reusability experiments were investigated. On the basis of the results, an SMX removal mechanism was proposed.

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“…Syngas and bio-oil are formed in addition to biochar as a result of this process. Biochar is a stable product with a half-life of several hundred to several thousand years, which has emerged as a promising solution for soil carbon sequestration [160,161]. Compared to burning or decomposing crop residues, which retain only ~3% and 10−20% carbon, respectively, biochar retains about 50% of its original content [162].…”

Section: Technologies For Co 2 Sequestration By Terrestrial Ecosystem...mentioning

confidence: 99%

Carbon Footprint Reduction and Climate Change Mitigation: A Review of the Approaches, Technologies, and Implementation Challenges

Lobus,

Knyazeva,

Popova

et al. 2023

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Since the Industrial Revolution, human economic activity and the global development of society in general have been heavily dependent on the exploitation of natural resources. The use of fossil fuels, deforestation, the drainage of wetlands, the transformation of coastal marine ecosystems, unsustainable land use, and many other unbalanced processes of human activity have led to an increase both in the anthropogenic emissions of climate-active gases and in their concentration in the atmosphere. It is believed that over the past ~150 years these phenomena have contributed to an increase in the global average temperature in the near-surface layer of the atmosphere by ~1 °C. Currently, the most pressing tasks facing states and scientific and civil societies are to reduce anthropogenic CO2 emissions and to limit the global air temperature increase. In this regard, there is an urgent need to change existing production systems in order to reduce greenhouse gas emissions and to sequester them. In this review, we consider up-to-date scientific approaches and innovative technologies, which may help in developing roadmaps to reduce the emissions of climate-active gases, control rising temperatures, decarbonize economies, and promote the sustainable development of society in general.

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Biochar for Soil Carbon Sequestration: Current Knowledge, Mechanisms, and Future Perspectives

Cited by 31 publications

References 163 publications

Carbon Mineralization Dynamics of Switchgrass (Panicum virgatum) Biochar in a Northern Florida Soil

Carbon Mineralization Dynamics of Switchgrass (Panicum virgatum) Biochar in a Northern Florida Soil

Unveiling Biochar Quality Index: A Factor Analysis Mediated Ranking Approach to Select Best Ranked Biochar for Adsorptive Removal of Sulfamethoxazole

Carbon Footprint Reduction and Climate Change Mitigation: A Review of the Approaches, Technologies, and Implementation Challenges

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