Biochar production and applications in agro and forestry systems: A review

Wang, Duo; Jiang, Peikun; Zhang, Haibo; Yuan, Wenqiao

doi:10.1016/j.scitotenv.2020.137775

Cited by 151 publications

(65 citation statements)

References 205 publications

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“…Biochar as a soil additive can enhance soil properties [21]. Biochar contributes to altering soil characteristics, resulting in positive modifications in water and nutrient retention capacity, soil aeration [22], as well as improving soil biological [23], chemical, and physical activities [24]. However, a recent review by Zhu and Chen [25] indicated the potential toxicity that can be induced to soil microbial communities with biochar application due to certain reactive compounds and heavy metals in the content of biochar.…”

Section: Open Accessmentioning

confidence: 99%

Biochar’s effect on the ecosystem services provided by sandy-textured and contaminated sandy soils: a systematic review protocol

et al. 2021

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Background Biochar is a relatively new soil amendment method in agricultural practices that can improve the ecosystem services of soils. Biochar has commonly been applied to less fertile or contaminated soils, specifically sandy-textured and contaminated sandy soils, to improve their properties. However, the available literature indicates that not all sandy-textured and contaminated sandy soils show the same response to biochar applications, as the sign and size of the effect vary across studies. More specifically, primary studies show heterogeneous and potentially conflicting impacts of biochar application on a set of ecosystem services provided by these types of soils; namely, biomass production, water cycle, nutrient cycle, and climate regulation. Therefore, the objective of the present study is to systematically review the available evidence base to synthesise the impact and drivers of biochar amendments on four specific ecosystem services provided by sandy-textured and contaminated sandy soils. Methods This review follows the guideline of the Collaboration for Environmental Evidence and corresponds to the ROSES (RepOrting standards for Systematic Evidence Synthesis) reporting standard. A comprehensive search strategy will be employed to cover peer-reviewed and gray literature through bibliographic databases, organizational and institutional websites, and web searches. Search terms and strategies have been developed to identify the impact of biochar on the ecosystem services of sandy-textured soils. The search results will be screened first by their title and abstract, and then by their full text. Two literature reviewers will do this based on eligibility criteria. A validity assessment will be conducted to critically appraise and assess the validity of studies using a common validity framework for environmental studies. Data will be extracted from the studies that are found to be valid for the review. Narrative synthesis and meta-analysis will be employed to synthesise the review results.

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Section: Open Accessmentioning

confidence: 99%

Biochar’s effect on the ecosystem services provided by sandy-textured and contaminated sandy soils: a systematic review protocol

et al. 2021

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“…Adding biochar to soil can increase soil hydraulic capacity, enhance soil fertility, and increase crop yield [ 52 ]. Great progress has been made in carbon sequestration, soil pollution control, water pollution control, and air pollution control in the environment field [ 53 ]. Additionally, biochar also plays a huge role in energy and fuels, fuel cells, and capacitors due to its high calorific value, high strength, large bulk density, flammability, strong stability, and good conductivity [ 54 , 55 ].…”

Section: Biocharmentioning

confidence: 99%

Biocomposites from Organic Solid Wastes Derived Biochars: A Review

Zhang

Cai

et al. 2020

Materials

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The replacement of natural fiber with biochars to prepare biocomposites has attracted widespread attention recently. Biochar has unique properties, including the porous structure, large specific surface area, high thermal stability, good conductivity, renewable and abundant feedstock source, and environmental friendliness, which provide excellent properties, environmental benefits, and low production costs for biochar-based composites. Biocomposites from organic solid waste-derived biochars show good prospects worldwide in terms of positive social, environmental, and economic impacts. This paper reviews current biochars, elucidates the effects of biochars on the characteristics and performance of biochar composites, and points out the challenges and future development prospects of biochar composites.

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“…The above research was based on the biochar samples of 45.5% carbon and 31.4% ash. Since the principal content of the biochar from slow pyrolysis differ considerably (Wang et al 2020) and the temperature had a significant effect on yield, constituents content of bio-char, and the densification process (Hu et al 2016), further study on densification of BFCS at various pyrolysis temperatures should be carried out in order to achieve better understanding of the briquetting characteristics of the BFCS.…”

Section: Process Optimization and Verification Experimentsmentioning

confidence: 99%

Optimization of process variables for briquetting of biochar from corn stover

Jiao

Tabil

Mingjin

et al. 2020

BioRes

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Instead of compressing biomass into briquettes, this study considers the compression of biochar. Densification is necessary for biochar to increase bulk density for convenience of handling, transportation, and storage. Response surface methodology was employed, and briquetting of biochar from corn stover was carried out in this study to investigate the effects of moisture content (at levels of 16, 17.6, 20, 22.4, and 24%), pressure (at levels of 21.5, 25, 30, 35, and 38.5 MPa), and residence time (at levels of 4, 6.4, 10, 13.6, and 16 s), on crushing resistance, dimensional stability of briquettes, and specific energy consumption of briquetting. The results showed that the effects of the variables on each evaluation index were significant (P < 0.01), the influence order was obtained, and the regression models are set up. The optimum condition for the briquetting process was moisture content of 18.5%, pressure of 38.5 MPa, and residence time of 4 s, giving mean values of the briquette crushing resistance of 49.9 N, dimensional stability of 93.8%, and specific energy consumption of briquetting of 4.41 MJ/t, respectively. The errors between the predicted values and the experimental values are all less than 5%.

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Biochar production and applications in agro and forestry systems: A review

Cited by 151 publications

References 205 publications

Biochar’s effect on the ecosystem services provided by sandy-textured and contaminated sandy soils: a systematic review protocol

Biochar’s effect on the ecosystem services provided by sandy-textured and contaminated sandy soils: a systematic review protocol

Biocomposites from Organic Solid Wastes Derived Biochars: A Review

Optimization of process variables for briquetting of biochar from corn stover

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