Optimal isotherm model and explanatory characteristics associated with metal ion adsorption on humic acids isolated from forest soils

Sangani, Mahmood Fazeli; Forghani, Akbar; Boguta, Patrycja; Anoosha, Marjan; Owens, Gary

doi:10.1007/s11368-022-03249-1

Cited by 3 publications

(2 citation statements)

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“…[9,10] Furthermore, due to the presence of various types of functional groups in the molecular structure, humic substances can interact with ions. [11] This property has made humic substances a subject of research not only in the context of a component for fertilizer production, [12] but also as substances for soil remediation [13,14] and wastewater treatment. [15,16,17] However, the use of humic substances in pure form as sorbents for metal ions may cause oxidative degradation of HS into products with a negative environmental impact.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the properties of humic substances, such as sorption and buffer properties [9,10] . Furthermore, due to the presence of various types of functional groups in the molecular structure, humic substances can interact with ions [11] . This property has made humic substances a subject of research not only in the context of a component for fertilizer production, [12] but also as substances for soil remediation [13,14] and wastewater treatment [15,16,17] .…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound‐Assisted Synthesis of Humic‐Silica Composites by the Isolation of Humic Substances from Peat and Lignite

Nieweś,

Biegun,

Marecka

et al. 2024

ChemPlusChem

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The aim of the presented study was to evaluate an integrated, direct procedure for the synthesis of humic‐silica composites (HSiC) by the isolation of humic substances (HS) from peat and lignite by the use of sodium silicate solution as an extractant. The obtained materials, because of the presence of humic functional groups, may potentially be used for removing contaminants from aqueous solutions. The quantitative assessment was based on experiments designed according to the Box‐Behnken plan. The statistical analysis of the results allowed to determine the optimal conditions of the process tested, for which the isolation efficiency of humic substances (HS) was greater than 50% for both raw materials. This made it possible to synthesize humic silica composites with a high content of HS, which have been qualitatively evaluated. This step was focused on the analysis of the humic structure using elemental analysis, spectroscopic methods, and differential thermal analysis coupled with thermogravimetry. On the basis of them, the presence of structures characteristic for HS in the HSiC tested was observed. Moreover, the results of the thermal analysis pointed to the higher thermal stability of the synthesized compounds, compared to the HS isolated with the use of a traditional extractant.

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