Structural-Group Composition and Biological Activity of Humic Acids Obtained from Brown Coals of Russia and Mongolia

Жеребцов, С. И.; Малышенко, Н. В.; Votolin, K. S.; Андроханов, В. А.; Sokolov, D. A.; Dugarjav, J.; Ismagilov, Z. R.

doi:10.3103/s0361521919030121

Cited by 14 publications

(4 citation statements)

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“…It can be seen from Table 3 that the f h/h of the four samples is OYL > YLHA > OHB > HBHA, indicating that OYL has the most hydrophilic groups, and in agricultural applications, OYL has higher biological activity. 52 It shows that HAs extracted from oxidized lignites contain more hydrophilic groups than those of raw lignites, indicating that oxidation can improve the biological activity of HAs. 3.7.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The oxygen-containing and nitrogen-containing alkyl carbons in HAs were hydrophilic carbons, which affect the biological activity of HAs. The hydrophilic/hydrophobic indexes ( f h/h ) of four HAs are calculated according to eq , and the results are listed in Table . It can be seen from Table that the f h/h of the four samples is OYL > YLHA > OHB > HBHA, indicating that OYL has the most hydrophilic groups, and in agricultural applications, OYL has higher biological activity . It shows that HAs extracted from oxidized lignites contain more hydrophilic groups than those of raw lignites, indicating that oxidation can improve the biological activity of HAs.…”

Section: Resultsmentioning

confidence: 99%

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Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Wang

Zhang

et al. 2021

ACS Omega

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To study the effect of H 2 O 2 on the content and properties of humic acids (HAs) in lignites, the experimental conditions including oxidation time, H 2 O 2 concentration, and the solid−liquid ratio were investigated. Under the optimum oxidation conditions, the contents of HAs of YL and HB lignite were 45.4 and 40.9%, respectively. The HAs extracted from oxidized and raw lignites were characterized and compared. The results showed that the HAs extracted from oxidized lignites contain more total acidic groups, carboxyl groups, and aliphatic carbon than that in HAs extracted from raw lignites, and their hydrophilic−hydrophobic index value is higher and thermooxidative stability is better than those in HAs extracted from raw lignites. In addition, the composition of polycyclic aromatic hydrocarbons and fluorophore types in HAs extracted from oxidized lignites are similar to the HAs extracted from raw lignites. The results indicated that the oxidation operation can increase the content of HAs in lignites, and simultaneously increase the content of oxygen-containing functional groups and biological activity of HAs, which provided a reference for the subsequent application of HAs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Wang

Zhang

et al. 2021

ACS Omega

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“…It can reduce abiotic stress by enhancing the activities of various antioxidant enzymes such as superoxide dismutase, catalase, and peroxidase (Liang et al 2007). Moreover, KH increased root formation and plant growth parameters as they are applied to major vegetables and crops (Verlinden et al 2009;Sustr et al 2019;Zherebtsov et al 2019). Furthermore, Mohammed et al (2021) referred to the possibility of replacing some of the potassium soil applications with foliar applications of KH without affecting tomato yield and growth, as well as the nutritional status of tomato plants grown in newly reclaimed sandy soil in Egypt.…”

Section: Introductionmentioning

confidence: 99%

Minimizing the Adverse Impact of Drought on Corn by Applying Foliar Potassium Humate Combined with Chitosan

Elshamly

2023

J Soil Sci Plant Nutr

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Previous studies have demonstrated the impact of potassium humate (KH) and chitosan (CH) on ameliorating drought effects, but their combined applications in promoting these benefits are still unfound. Therefore, the current study aims to evaluate the efficacy of KH and CH on corn growth, yield, nutrient contents, and water productivity under full and limited irrigation conditions. Under the drip irrigation system, a split-plot experiment was performed with three replications in the second week of February in the seasons of 2021 and 2022. The main plot was equipped with a valve and a flow emitter to control the amount of the targeted irrigation levels (full irrigation and limited irrigation from the development stage onwards), as well as four foliar applications in the subplot (0, CH 500 mg l−1, KH 3000 mg l−1, and CH 500 mg l−1 + KH 3000 mg l−1). It was found that separate foliar applications of KH or combined foliar applications of KH + CH had a significant impact on the most examined traits. However, compared to the control, adopting limited irrigation and applying combined applications thereof have significantly increased iron, zinc, manganese, oil, protein, yield, and water productivity. In addition, this combination decreased proline, and the maximum reduction was observed for the combined application with adopting full irrigation. In arid regions, the researcher recommends treating stressed plants with combined foliar applications of KH + CH, which could help plants overcome the negative effects of drought and attain the highest yield and water productivity.

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

Ore

Adeola

Fapohunda

et al. 2023

Environ Sci Pollut Res

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Structural-Group Composition and Biological Activity of Humic Acids Obtained from Brown Coals of Russia and Mongolia

Cited by 14 publications

References 3 publications

Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Minimizing the Adverse Impact of Drought on Corn by Applying Foliar Potassium Humate Combined with Chitosan

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

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Structural-Group Composition and Biological Activity of Humic Acids Obtained from Brown Coals of Russia and Mongolia

Cited by 14 publications

References 3 publications

Exploration of the H2O2 Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Exploration of the H2O2 Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Minimizing the Adverse Impact of Drought on Corn by Applying Foliar Potassium Humate Combined with Chitosan

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

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Product

Resources

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Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites

Exploration of the H₂O₂ Oxidation Process and Characteristic Evaluation of Humic Acids from Two Typical Lignites