Dyna (Sep 2022)

Extraction yield of humic substances from organic materials

  • Irina Pedroso-Rodriguez,
  • Lourdes Yamén González-Sáez,
  • Jesús Luis-Orozco,
  • Liz Pérez-Martínez,
  • Carlo Vandecasteele,
  • Jo Van Caneghem

DOI
https://doi.org/10.15446/dyna.v89n223.101666
Journal volume & issue
Vol. 89, no. 223

Abstract

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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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