Humic substances derived from unconventional resources : extraction, properties, environmental impacts, and prospects

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

11 Scopus Citations
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Author(s)

  • Odunayo T. Ore
  • Adedapo O. Adeola
  • Oluwaseun Fapohunda
  • Ajibola A. Bayode
  • Festus M. Adebiyi

Detail(s)

Original languageEnglish
Pages (from-to)59106–59127
Number of pages22
Journal / PublicationEnvironmental Science and Pollution Research
Volume30
Issue number21
Online published6 Apr 2023
Publication statusPublished - May 2023

Abstract

Humic substances comprise up to 70% of the total organic matter in soils, between 50 and 80% of the dissolved organic matter in water, and about 25% of dissolved organic matter in groundwater. Elucidation of the complex structure and properties of humic substances requires advanced analytical tools; however, they are of fundamental importance in medicine, agriculture, technology, and the environment, at large. Although they are naturally occurring, significant efforts are now being directed into their extraction owing to their relevance in improving soil properties and other environmental applications. In the present review, the different fractions of humic substances were elucidated, underlying the mechanisms by which they function in soils. Furthermore, the extraction processes of humic substances from various feedstock were illustrated, with the alkali extraction technique being the most widely used. In addition, the functional group and elemental composition of humic substances were discussed. The similarities and/or variations in the properties of humic substances as influenced by the source and origin of feedstock were highlighted. Finally, the environmental impacts of humic substances were discussed while highlighting prospects of humic acid production. This review offers enormous potential in identifying these knowledge gaps while recommending the need for inter- and multidisciplinary studies in making extensive efforts toward the sustainable production of humic substances.

© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023

Research Area(s)

  • Agriculture, Bitumen, Coal, Environment, Humic substance, Remediation

Citation Format(s)

Humic substances derived from unconventional resources: extraction, properties, environmental impacts, and prospects. / Ore, Odunayo T. ; Adeola, Adedapo O. ; Fapohunda, Oluwaseun et al.
In: Environmental Science and Pollution Research, Vol. 30, No. 21, 05.2023, p. 59106–59127.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review