Study on Sorption Characteristics of Uranium onto Biochar Derived from Eucalyptus Wood

Mishra, Vijayakriti; Sureshkumar, M.; Gupta, Nandini; Kaushik, C.P.

doi:10.1007/s11270-017-3480-8

Cited by 59 publications

(13 citation statements)

References 34 publications

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“…The Pb(II) removal potential from aqueous solutions by BC (77.5 mg g À1 ) and MBC (110 mg g À1 ) was signicantly higher than other modied biochars (Table 4), such as those of oak wood-(10.1 mg g À1 ), 43 oak bark-(30.2 mg g À1 ), 30 bamboo-(25.1 mg g À1 ), 44 pine bark-(25.3 mg g À1 ), 45 romchar-(17.7 mg g À1 ) and oxford (32.2 mg g À1 ) derived biochars, 46 and close to those of sewage-(99.8 mg g À1 ) derived biochars. 47 For U(VI), the removal potential from aqueous solutions of the biochars tested herein (BC: 48.6 mg g À1 , MBC: 53.2 mg g À1 ) was signicantly higher than those of eucalyptus wood-(27.2 mg g À1 ), 48 fungus pleurotus ostreatus-(19.4 mg g À1 ) 49 and magnetic chitosan-(42 mg g À1 ) 51 derived bichars. However, BC and MBC showed the lower U(VI) removal potential as compared to activated cactus bre (214 mg g À1 ).…”

Section: Adsorption Kineticsmentioning

confidence: 84%

Lead and uranium sorptive removal from aqueous solution using magnetic and nonmagnetic fast pyrolysis rice husk biochars

et al. 2018

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Section: Adsorption Kineticsmentioning

confidence: 84%

Lead and uranium sorptive removal from aqueous solution using magnetic and nonmagnetic fast pyrolysis rice husk biochars

et al. 2018

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“…33,34 It has been known that during pyrolysis there is an increasing of aromaticity through the establishment of carboncarbon bond and loss of O and H, 34 which resulted in O/C ratio values of 0,22 and H/C of 0,46 less than eucalyptus wood values, equals to 0,67 and 1,45, respectively. 35 After comparing band and functional groups of Table 3 with other results from literature, 36,37 one seen that biochar still presents original peaks of biomass, such as OH band and cellulose and lignin signs. This is partially explained by the relatively low temperature of pyrolysis, from 350 to 400ºC, which agrees with H/C ratio values equals to 0,46, in the range that indicates simultaneous occurrence of aliphatic and cyclic (aromatic) carbon chains.…”

Section: Resultsmentioning

confidence: 79%

Carbon stability and biochar aging process after soil application

Tozzi¹,

Puga²,

Carvalho³

et al. 2019

HIJ

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During the pyrolysis process for biochar production there is the stabilization of C in aromatic compounds, which accredits biochar to function as an input for C sequestration in the soil. The aim of this study was assessing of C sequestration potential through pyrolyzed biochar in low temperature (350-400 o C), checking the possible deleterious effect in soil organic matter (SOM) and assessing the cation exchange capacity (CEC) alteration, as the biochar is aging. The research strategy involved, besides the materials characterization, the installation and conduction of two incubations under controlled laboratory conditions. The evaluation of the biochar stability of C carbon, the effects on SOM and, therefore, the potential for the use of biochar in soil C sequestration was carried out in a respirometric experiment, with four typical tropical soil samples mixed with eucalyptus biochar dose (0.0, 2.5, 5.0, 10.0 and 20.0 g Ckg-1). After 120 days of incubation under non-limiting temperature and moisture conditions, the results showed C mineralization rates between 0,4 and 9,3%, which demonstrates the high carbon stability in the biochar. Through the 13 C technique in soil analysis at the end of the incubation was observed small reductions of original C in SOM for two of the evaluated soils, although gains from biochar application represented more than double the original C content of soils. The 360-day incubation experiment to evaluate biochar aging, focusing on the generation of negative charges, considered the variation in the presence or absence of soil; moisture and temperature (25 or 32°C). Among the factors tested, there was only effect of time on CEC. The increase in CEC was practically 100 mmol c kg-1 in one year, which represented a 50% increase in surface charges due to the biochar aging process. The research led to the conclusion that biochar must be considered an input to soil C sequestration, in the reason of its high stability after application, recommending the use of the conservative value of 90% of the total C applied via biochar rate to environmental accounting related to C sequestration. In addition, increases in CEC in biochar treated soils are expected due to biochar surface charges as well as the aging process after application.

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“…The concentrations of dioxins measured in biochar were very close to those reported for background concentrations in the soils of the Washington area. Further studies indicate that biochar can be produced through feedstock .…”

Section: Role Of Biochar In Environmental Management and Technologiesmentioning

confidence: 99%

“…The hardness is the coefficient most important for industrial charcoal, since it describes the resistance to disintegration. In some countries standard scales have been compulsory to check this coefficient .…”

Section: Properties Of Biocharmentioning

confidence: 99%

Role of Biochar Products towards Environmental Management and Technologies: A Brief Review

2018

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Biochar products are not structurally homogenous material but consist of a wide range of heterogeneous elements and chemical structures. This erroneous conception is generally based on the parent material (biomass) and the pyrolysis conditions while covering numerous forms of black carbon. These characteristics lead to a wide spectrum of particle sizes, electrical conductivities, and surface areas among the different products. Biochar products are known to have environmental benefits by connecting the charring biomass to the soil, a step towards environmental management and technology also applied in land administration. Suspected advantages consist of increased soil fertility and crop yield. This paper determines the applicability of biochar products for environmental management and technology, its impacts and effects on soil and soil biota. Various techniques used in the production of biochar are discussed as well as the manufacturing costs on small, medium, and large scales.

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Study on Sorption Characteristics of Uranium onto Biochar Derived from Eucalyptus Wood

Cited by 59 publications

References 34 publications

Lead and uranium sorptive removal from aqueous solution using magnetic and nonmagnetic fast pyrolysis rice husk biochars

Lead and uranium sorptive removal from aqueous solution using magnetic and nonmagnetic fast pyrolysis rice husk biochars

Carbon stability and biochar aging process after soil application

Role of Biochar Products towards Environmental Management and Technologies: A Brief Review

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