Valorization of peanut shell biochar for soil amendment

Sathe, Priyanka S.; Adivarekar, Ravindra V.; Pandit, Aniruddha B.

doi:10.1080/01904167.2021.1963771

Cited by 14 publications

(12 citation statements)

References 52 publications

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“…Generally, the nut shell samples exhibit similar characteristics and elemental composition. This type of biomass is characterized by a low ash content A d = 0.4-1.1 wt% (except for the peanut shell sample A d = 3.4 wt% [20]) and a high content of volatile compounds V r = 66.4-72.7 wt% and oxygen O d = 40.3-46.7 wt%, which is characteristic of the biomass [21]. In turn, the LHV value (17.5-20.3 MJ/kg) is comparable not only with other types of the biomass but also with low-grade coals (Lignite/brown coal or Sub-bituminous coal) [22].…”

Section: Nut Shell Characteristicsmentioning

confidence: 99%

Analysis of the Physicochemical Characteristics of Biochar Obtained by Slow Pyrolysis of Nut Shells in a Nitrogen Atmosphere

et al. 2021

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The process of slow pyrolysis of seven nut shell samples, in a nitrogen-purged atmosphere, has been studied, as well as characteristics of biochar obtained. The heat carrier with a temperature of 400–600 °C (with a step of 100 °C) was supplied indirectly using a double-walled reactor. The heating rate was 60 °C/min. At increased temperature of the heating medium, a decrease in the amount of the resulting carbon residue averaged 6.2 wt%. The release of non-condensable combustible gas-phase compounds CO, CH4, and H2, with maximum concentrations of 12.7, 14.0, and 0.7 vol%, respectively, was registered. The features of the obtained biochar sample conversions were studied using thermal analysis in inert (nitrogen) and oxidative (air) mediums at 10 °C/min heating rate. Kinetic analysis was performed using Coats–Redfern method. Thermal analysis showed that the main weight loss (Δm = 32.8–43.0 wt%) occurs at temperatures ranging between 290 °C and 400 °C, which is due to cellulose decomposition. The maximum carbon content and, hence, heat value were obtained for biochars made from macadamia nut and walnut shells. An increased degree of coalification of the biochar samples affected their reactivity and, in particular, caused an increase in the initial temperature of intense oxidation (on average, by 73 °C). While technical and elemental composition of nut shell samples studied were quite similar, the morphology of obtained biochar was different. The morphology of particles was also observed to change as the heating medium temperature increased, which was expressed in the increased inhomogeneity of particle surface. The activation energy values, for biochar conversion in an inert medium, were found to vary in the range of 10–35 kJ/mol and, in an oxidative medium—50–80 kJ/mol. According to literature data, these values were characteristic for lignin fibers decomposition and oxidation, respectively.

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Section: Nut Shell Characteristicsmentioning

confidence: 99%

Analysis of the Physicochemical Characteristics of Biochar Obtained by Slow Pyrolysis of Nut Shells in a Nitrogen Atmosphere

et al. 2021

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“…Figure c depicts the XRD patterns of iron-impregnated peanut shell and biochar samples, as well as iron ore sludge. The massive humps peak at 2θ = 23 and 35° are typical of the lignocellulosic backbone of the peanut shell biomass . The sharp diffraction peak at 2θ = 29° indicates that the biochar formed after pyrolysis at 600 °C, PSB, is graphitic .…”

Section: Resultsmentioning

confidence: 99%

“…The massive humps peak at 2θ = 23 and 35°are typical of the lignocellulosic backbone of the peanut shell biomass. 67 The sharp diffraction peak at 2θ = 29°indicates that the biochar formed after pyrolysis at 600 °C, PSB, is graphitic. 68 This peak is missing from the PS_IS and PS_ISC spectra because they were not pyrolyzed at high temperatures.…”

Section: Characterization Of the Adsorbentsmentioning

confidence: 99%

A Potential Peanut Shell Feedstock Pyrolyzed Biochar and Iron-Modified Peanut Shell Biochars for Heavy Metal Fixation in Acid Mine Drainage

Bacirhonde

Dzade

Eya

et al. 2022

ACS Earth Space Chem.

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The biomass from peanut shells was pyrolyzed at 600 °C, and the resulting biochar was used as an adsorbent to extract heavy metals from acid mine drainage in the beginning. Initial screening findings showed that the peanut shell biochar had good affinity for Cu(II), Mn(II), Pb(II), and Zn(II), but not As(V). The adsorption process was predicted to achieve saturation in 200 min, and Pb had the maximum absorption at about 127 mg/g(II). Additionally, according to the Langmuir isotherm model, the order of the q max (mg/g) was Pb(II) > Cu(II) > Zn(II) > Mn(II). The iron present in the acid mine drainage was recovered by precipitation and applied as sludge to change it in order to improve its affinity toward arsenic because the peanut shell biochar was unable to adsorb and remove arsenic. As a result, the alteration significantly increased the As(V) absorption, which uptake at about 8 mg/g. A thermodynamically stable interface may have formed as a result of the single layer of peanut shell biochar being stabilized on the surface of −Fe 2 O 3 (0001) by C−Fe chemical bonds through the terminal C atoms with an adhesion energy of only −0.315 eV Å −2 , according to theoretical insight from first principles DFT calculations. Pb was anticipated to have the strongest adsorption ((E ad = −1.94 eV) and Zn to have the poorest adsorption (E ad = 0.98 eV). Pb > Cu > Fe > As > Mn > Zn is the predicted trend for the adsorption in decreasing strength, which is consistent with the experimental findings and supports their potential for more acid mine drainage cleanup.

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“…Soil N may be mineralized to inorganic N when there is not enough N in the soil for plant use or microbial activity (Liu et al, 2017). At the same time, biochar improves the nitrogen use efficiency of plants, thereby promoting plant growth (Sathe et al, 2021). Biochar contains various organic and inorganic forms of P that can be used as a source of these nutrients to provide available P to the soil (Sui et al, 2022).…”

Section: N and Pmentioning

confidence: 99%

Biochar enhanced phytostabilization of heavy metal contaminated mine tailings: A review

Shi

Zang

Yang

et al. 2022

Front. Environ. Sci.

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Mining activities has generated large amounts of mine tailings each year, and these tailings usually contain high concentrations of heavy metal pollutants, which not only cause serious damage to the local and surrounding soil ecosystems, but also harm human health via the transmission of food chain. Phytoremediation is treated as environmentally friendly, long-term effective and low-cost restoration method. However, tailing soil acidification, low organic matter content, poor water holding capacity and compaction make plant struggle to survive. Biochar, a soil conditioner can promote plant growth by improving the physical, chemical and biological properties of soil, thus strengthening the ability of phytoremediation in the contaminated tailings. This review elaborates how the physicochemical properties of biochar affect phytoremediation; and summarized how the raw materials of biochar affect the physicochemical characteristics. Finally, the future research directions are prospected.

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Valorization of peanut shell biochar for soil amendment

Cited by 14 publications

References 52 publications

Analysis of the Physicochemical Characteristics of Biochar Obtained by Slow Pyrolysis of Nut Shells in a Nitrogen Atmosphere

Analysis of the Physicochemical Characteristics of Biochar Obtained by Slow Pyrolysis of Nut Shells in a Nitrogen Atmosphere

A Potential Peanut Shell Feedstock Pyrolyzed Biochar and Iron-Modified Peanut Shell Biochars for Heavy Metal Fixation in Acid Mine Drainage

Biochar enhanced phytostabilization of heavy metal contaminated mine tailings: A review

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