Biochar properties and eco-friendly applications for climate change mitigation, waste management, and wastewater treatment: A review

Qambrani, Naveed Ahmed; Rahman, M. M.; Won, Seunggun; Shim, Soomin; Ra, Chang‐Six

doi:10.1016/j.rser.2017.05.057

Cited by 538 publications

(228 citation statements)

References 203 publications

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“…This implies that an appreciable degree of lignin cross-linking had occurred during pyrolysis and this is in consonance with findings from literature [17,33]. Biochar from agricultural residues produced at about 500°C has been reported to possess a high quantity of recalcitrant C fraction [42,43]. This biochar condition is favourable for carbon sequestration in soils.…”

Section: Ao Balogun Et Alsupporting

confidence: 86%

“…There are apparent structural changes which has conferred some unique functional groups on the biochar surface. It has been noted that the presence of these functional groups enhances its adsorption capability and also serves as nutrient exchange sites [42]. Therefore they may be applied as either a contaminant adsorbent and/or soil fertility improvement medium.…”

Section: Ao Balogun Et Almentioning

confidence: 99%

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Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Balogun

Sotoudehniakarani

McDonald

2017

Journal of Analytical and Applied Pyrolysis

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A B S T R A C TBrewer's spent grains, major by-products of the beverage industries, were obtained from a Nigerian brewery and subjected to pyrolysis at 500°C. Analytical pyrolysis (Py-GC/MS) was conducted on the original BSG, extractivefree BSG and BSG CH 2 Cl 2 extract. There was a marked difference in the concentration of levoglucosan between the extractive-free BSG (40.5%) and the original BSG (11.5%). The Py-GC/MS detected significant amount of palmitic and oleic acids in the three samples. Prior to pyrolysis, the extractives content were isolated through methanolysis, transesterified and subjected to GC/MS analysis. The analysis revealed the presence of linoleic, oleic and palmitic acids in an appreciable quantity. The BSG and its biochar were also characterised according to Fourier transform infrared and Raman spectroscopic, and thermogravimetric analyses alongside some conventional physico-chemical analysis. The total crystallinity and condensation indices were evaluated from specific FTIR spectra peaks so as to monitor structural transformations in the bio-char. Kinetic data were deduced from TGA measurements and it was apparent that thermal decomposition of BSG is better modelled as a multi-step reaction mechanism. The nitrogen content of the bio-char was relatively high making it a suitable feedstock for the production of in situ nitrogenised activated bio-carbon. There was a significant variation between the structural configuration of the original BSG and the bio-char as revealed by the change in the value of the condensation index as well as the cellulose crystallinity content. It may thus be concluded that the BSG biomass would be a viable feedstock for thermal decomposition and other valorisation processes.

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Section: Ao Balogun Et Alsupporting

confidence: 86%

Section: Ao Balogun Et Almentioning

confidence: 99%

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Balogun

Sotoudehniakarani

McDonald

2017

Journal of Analytical and Applied Pyrolysis

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“…The morphology and pore size distribution in biochar depends on the composition of the feedstock materials and the temperature adopted during char formation [23]. Table 1 shows the semi-quantitative chemical analysis by EDS of the ash and chars studied, expressed as a percentage of the elements.…”

Section: Resultsmentioning

confidence: 99%

Feasibility of Utilization of Charcoal and Ashes From Biomass-Energy Processes in Construction Materials

Quaranta¹,

Caligaris²,

Pelozo³

et al. 2017

WIT Transactions on Ecology and the Environment

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Biomass-energy processes are those used to obtain energy by the burning or biochemical converting of any organic matter to be used for fuel. In recent years, some materials used as a source for biomass energy have been obtained from the discards of agricultural activities. These include wood, sawdust, corn, sugarcane and rice husks, among others. The processes for converting biomass into energy are numerous. The most commonly used are combustion, co-firing process and pyrolysis. The residual endproducts obtained from these processes are highly dependent on the process conditions, especially temperature, pressure and atmosphere. Char and ashes are the most commonly obtained materials. The objective of this work is to analyse the feasibility of reusing these discards of biomass-energy processes, as additions in clay mixtures for the production of ceramic materials for civil construction. For this purpose, charcoal and ashes obtained from various biomasses have been characterized by SEM, EDS, DTA-TGA, XRD, etc. These results, and the determination of the theoretical sintering temperatures by the use of ternary diagrams, lead to the establishment of the feasibility of using these discards in current ceramic industry processes. Charcoal and ashes from sunflower husks, brewery waste and pine sawdust are the materials studied.

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“…In order to follow the EU dictates, several studies in this topic are involved in the valorization of biowaste as starting materials for the production of new value-added products, such as fine chemicals [15][16][17], polymeric (mostly bioplastics) and composite materials [4,[18][19][20][21], carbonaceous materials and biochars [22][23][24][25], biofuels, and/or biogas [26][27][28][29][30]. In this context, composting consists of an (an)aerobic biological process for decomposing the organic fraction into a more stabilized material with different properties that depend on the initial composition [11] and composting methodologies.…”

Section: Introductionmentioning

confidence: 99%

Isolation, Characterization, and Environmental Application of Bio-Based Materials as Auxiliaries in Photocatalytic Processes

et al. 2018

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Sustainable alternative substrates for advanced applications represent an increasing field of research that attracts the attention of worldwide experts (in accordance with green chemistry principles). In this context, bio-based substances (BBS) isolated from urban composted biowaste were purified and characterized. Additionally, these materials were tested as auxiliaries in advanced oxidizing photocatalytic processes for the abatement of organic contaminants in aqueous medium. Results highlighted the capability of these substances to enhance efficiency in water remediation treatments under mild conditions, favoring the entire light-driven photocatalytic process.

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Biochar properties and eco-friendly applications for climate change mitigation, waste management, and wastewater treatment: A review

Cited by 538 publications

References 203 publications

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Feasibility of Utilization of Charcoal and Ashes From Biomass-Energy Processes in Construction Materials

Isolation, Characterization, and Environmental Application of Bio-Based Materials as Auxiliaries in Photocatalytic Processes

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