Potential of Biochar Derived from Agricultural Residues for Sustainable Management

Khawkomol, Sasiwimol; Neamchan, Rattikan; Thongsamer, Thunchanok; Vinitnantharat, Soydoa; Panpradit, Boonma; Sohsalam, Prapa; Werner, David; Mrozik, Wojciech

doi:10.3390/su13158147

Cited by 36 publications

(22 citation statements)

References 45 publications

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“…CH, CHC, and CHEG showed a peak at 1740 cm − 1 ascribed to C=O stretching. CHC had an acidic surface (pH = 6.1) as indicated by acidic functional group peaks of 1740 and 1370 cm − 1 , representing carboxylic and phenolic groups [19,25]. The peak at 1585 and 1215 cm − 1 in CHC and chitosan (Fig.…”

Section: Characteristics Of Biochar and Modified Pelletsmentioning

confidence: 95%

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Chitosan impregnation of coconut husk biochar pellets improves their nutrient removal from eutrophic surface water

Thongsamer

Vinitnantharat

Pinisakul

et al. 2022

Sustain Environ Res

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The presence of excess nutrients in water resources can be harmful to human health and aquatic ecosystems. To develop an affordable water treatment method, the agricultural waste material coconut husk was converted into a low-cost adsorbent by thermal conversion to biochar, pelletized without (CH), and with chitosan (CHC), or eggshell powder (CHEG) modifications. The physical and chemical properties of all adsorbents were characterized using Brunauer-Emmett-Teller (BET) surface analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, pHzpc, iodine number and elemental analysis. The adsorption of ammonium (NH4+), nitrate (NO3−), and phosphate (PO43−) in single and mixed solute solutions was investigated for initial concentrations of 10 mg L− 1. Langmuir, Freundlich, Sips, Dubinin-Radushkevich (D-R) and BET isotherm models were used to investigate the adsorption mechanisms. The maximum adsorption capacity of NH4+ on CH, CHC, and CHEG from mixed solute solution was 5.0, 4.7 and 5.9 mg g− 1, respectively, while the adsorption capacity of mixed:single solute solution was 0.95, 0.93, and 1.04, respectively. CH, CHC, and CHEG had greater ability to remove the cation NH4+ than anions NO3− and PO43− from aqueous solution. The highest maximum adsorption capacity for anions NO3− and PO43− was found on CHEG (1.7 mg g− 1) and CH (6.7 mg g− 1), respectively. NH4+ and NO3− were bound by chemisorption as indicated by D-R isotherm E values (> 8 kJ mol− 1), and enthalpy ∆H values (> 80 kJ mol− 1). In contrast, PO43− adsorption was mainly by physical interaction, including pore-filling, and electrostatic attraction. Pseudo first order and pseudo second order models provided good fits of the sorption kinetics data (R2 > 0.9). The initial concentrations of NH4+, NO3−, and PO43− in surface water sampled from a canal in Bangkok were 10.4, 1.2, and 3.9 mg L− 1, respectively, which indicated eutrophication. At a dose of 20 g L− 1, CHC achieved the best nutrient removal from this surface water, by 24% for NH4+, 25% for NO3−, and 66% for PO43− after 48 h contact, respectively.

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Section: Characteristics Of Biochar and Modified Pelletsmentioning

confidence: 95%

“…Coconut husk was obtained from central Thailand and carbonized to biochar by a community 200-L drum kiln method at a temperature of around 400 °C [19]. The carbonized husks were crushed to powder and used for making three types of biochar pellets as summarized in Fig.…”

Section: Methodsmentioning

confidence: 99%

Chitosan impregnation of coconut husk biochar pellets improves their nutrient removal from eutrophic surface water

Thongsamer

Vinitnantharat

Pinisakul

et al. 2022

Sustain Environ Res

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“…101,102 In some specific uses, biochar may need to be modified via activation and/or other post-pyrolysis treatments. 103,104 Some of the lignocellulosic material feedstocks used for biochar production include wood waste, 105 agricultural residues, 106 forestry waste, 107 municipal wastes, 108 and dairy manure. 109 Lignocellulosic materials consist of cellulose, hemicellulose, and lignin, in addition to extractives, fats, and inorganic fractions.…”

Section: Biochar Production Formation Characterization and Modificationmentioning

confidence: 99%

Perspectives of Engineered Biochar for Environmental Applications: A Review

2022

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Research on using biochar for environmental applications has witnessed unprecedented advances in the past decade. Biochar is universally considered one of the best alternatives to store carbon to fight global warming. Thus, the sequential use of biochar in environmental remediation compatible with carbon sequestration is receiving growing attention. One of the reasons for such huge interest is the possibility to engineer biochar with targeted properties (e.g., surface area and chemistry) relevant to existing environmental issues. These properties can be achieved by selecting appropriate raw materials, processing conditions, carbonization technology, and the possibility of selecting postproduction modification approaches. The objective of this review is to summarize strategies to enhance biochar properties relevant to its use in environmental services (e.g., water purification, air/gas cleaning, construction materials, soil amendments) and the corresponding results on the use of this material for these applications. The main methods for enhancing biochar properties for environmental applications reviewed include activation (physical and chemical), oxidation, metal and metal oxide modification, metal-free heteroatom doping, and biological modification. Both modified and unmodified biochars have been used for soil amendments as adsorbents of pollutants in the aqueous phase (e.g., removal of P and N, heavy metals, and organic pollutants), adsorbents of pollutants in the gas phase (e.g., biogas cleaning), as a catalyst, as an additive for improving anaerobic digestion, and as an admixture to cementitious/construction materials, with promising results in all cases. New opportunities for using biochar are being reported as the science of biochar production, modification, and use advances.

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“…Biochars are highly porous carbon-rich materials. They are obtained by the pyrolysis of substances of biological origin like coconut shell ash, corn cob, citrus peel waste, and rice husk ash [74]. Being rich in carbon, all these materials are the most suitable candidate for the synthesis of CNTs.…”

Section: Agrowaste and Biochars As A Source Of Cntsmentioning

confidence: 99%

Recent Advances in Methods for Synthesis of Carbon Nanotubes and Carbon Nanocomposite and their Emerging Applications: A Descriptive Review

Gacem

Modi²,

Yadav

et al. 2022

Journal of Nanomaterials

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Nanomaterials have gained huge applications ever since their discoveries, especially in the field of electronics, medicine, research, and environmental cleanup. Nanomaterials have a high surface area-to-volume ratio along with high surface energies making them suitable for such wide applications. Carbon nanotubes (CNTs) and carbon nanocomposite (CNC) materials are remarkable nanomaterials that have become the backbone of most industries these days. Both materials have gained huge attention in the last decade by the scientific community. CNTs come in two variants, i.e., single-walled CNTs (SW-CNTS) and multiwalled CNTs (MW-CNTs). Due to their wider applications, CNT synthesis is currently emerging with the advancement in technology. Currently, CNTs are being synthesized by chemical as well as physical approaches. The current review article focuses on the vital research and application for the synthesis of CNTs depending on the quality of the nanotube materials. Controlled routes to their organization and assembly are also discussed in detail over here. The aim is to provide recent advances in the synthesis methods, of CNTs, their current applications, future applications, and the potential of agrowaste and industrial waste for the synthesis of CNTs and nanomaterials.

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Potential of Biochar Derived from Agricultural Residues for Sustainable Management

Cited by 36 publications

References 45 publications

Chitosan impregnation of coconut husk biochar pellets improves their nutrient removal from eutrophic surface water

Chitosan impregnation of coconut husk biochar pellets improves their nutrient removal from eutrophic surface water

Perspectives of Engineered Biochar for Environmental Applications: A Review

Recent Advances in Methods for Synthesis of Carbon Nanotubes and Carbon Nanocomposite and their Emerging Applications: A Descriptive Review

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