Extraction of humic acids from Kansko-Achinsk lignite

Lukyanov, N. V.; Syroezhko, A. M.; Slavoshevskaya, N. V.; Strakhov, V. M.; Potekhin, V. M.; Itskovich, V. A.

doi:10.3103/s1068364x16020022

Cited by 1 publication

(5 citation statements)

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“…The highest extraction yield value of HA is 38.53%, obtained in alternative 8 (VC-NaOH-HCl), higher than shown by [13] who reported 13.67%. The vermicompost is the raw material with the highest amount of organic matter (35-60%), agreed to data reported by the Provincial Laboratory of Soils in Matanzas (2020).…”

Section: Extraction Yield Of Fa and Hacontrasting

confidence: 52%

“…3 shows that the effect of interaction between the raw materials has a significant influence. The highest volume of FA (43 mL) is obtained in the alternative 6 (garden waste -NaOH -HCl), which was used by the International Humic Substances Society [13]. While the lowest volume is appreciated with the combination compost -NaOH -H 2SO4; it matches with what is explained in the basic extraction stage (in epigraph 3.1).…”

Section: Acid Extraction Stagementioning

confidence: 65%

“…Two methods are used for the extraction of humic substances [8,13]. Both are based on two fundamental stages: basic extraction with NaOH (0.1 mol.L -1 ) or KOH (0.1 mol.L -1 ) respectively as basic extractants (BE), and acid extraction with HCl (6 mol.L -1 ) or H2SO4 (6 mol.L -1 ) as acid extractants (AE), respectively (see Table 1).…”

Section: Methodologies Of Extraction Of Humic Substancesmentioning

confidence: 99%

“…The highest amount of HA (1.93 g) is obtained in the alternative 8 (VC-NaOH-HCl) (see Table 3). These extractants have been used by the International Humic Substances Society because they are considered stronger [13].…”

Section: Acid Extraction Stagementioning

confidence: 99%

“…There is a great number of methods for extraction of HS, with different extraction reagents [8,[12][13][14][15]:…”

Section: Introductionmentioning

confidence: 99%

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Extraction yield of humic substances from organic materials

Pedroso-Rodriguez

González-Sáez²,

Luis-Orozco³

et al. 2022

DYNA

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At present there is a great advance in the use of organic substances as fertilizers; humic substances are one of them with various forms of extraction. This article evaluates the extraction yield of humic substances (humic acid and fulvic acid) from three raw materials and different basic extractants and acids. In the basic extraction of humic substances, the type of raw material significantly influences, to a p value equal to 5 %. The maximum extraction volumes of humic substances are with garden waste. The fractionation stage of the humic and fulvic acids (acid extraction) depends on the type of basic extractant. The alternative Vermicompost - NaOH - HCl is the most economic and technically feasible, with 38.53 % of extraction yield value of humic acid and 64.90 $/h of gross profit.

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Section: Extraction Yield Of Fa and Hacontrasting

confidence: 52%

Section: Acid Extraction Stagementioning

confidence: 65%

Section: Methodologies Of Extraction Of Humic Substancesmentioning

confidence: 99%

Section: Acid Extraction Stagementioning

confidence: 99%

“…There is a great number of methods for extraction of HS, with different extraction reagents [8,[12][13][14][15]:…”

Section: Introductionmentioning

confidence: 99%