A comparative study of tea waste derived humic-like substances with lignite-derived humic substances on chemical composition, spectroscopic properties and biological activity

Raguraj, Sriharan; Kasim, Susilawati; Jaafar, Noraini Md; Nazli, Muhamad Hazim; Amali, Rathnasekara Kuruppu Arachchige

doi:10.1007/s11356-022-20060-0

Cited by 11 publications

(3 citation statements)

References 52 publications

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“…The broad band at 3600–3200 cm –1 corresponds to phenolic groups, but also –OH for hygroscopic water . The signal related to the vibrations of CH and CH 2 in aromatic rings was observed as a shoulder at 3150–3000 cm –1 , and the low intensity peaks observed at 2950 and 2850 cm –1 can be assigned to the stretching of –CH 3 and –CH 2 – in aliphatic chains, respectively. − The intensive signals at about 1650, 1420, and 1220 were associated with the vibrations of the carboxyl structures and correspond to the CO stretches, COO – asymmetric stretching, and the deformation of C–O, respectively. − The signal peaking at 1020 cm –1 represented the C–O stretching of polysaccharides, and the C–H vibrations in aromatic structures were observed in the 860 cm –1 band . The peaks in the region below 700 cm –1 may be attributed to the inorganic constituents of the samples tested …”

Section: Resultsmentioning

confidence: 98%

Application of Alkaline Deep Eutectic Solvents as a Green Alternative to the Traditional Extractants for the Isolation of Humic Substances

Nieweś,

Marecka,

Huculak-Mączka

2024

ACS Omega

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The presented study focused on the possibility of using alkaline deep eutectic solvents (ADESs) as green extractants for the isolation of humic substances (HSs) from peat and lignite in a process intensified by ultrasound. For this purpose, the extraction procedure was statistically described on the basis of the Box−Behnken design, and the carboxyl group content in the obtained products was optimized due to the ADES composition, ultrasound intensity, and extraction time. For optimal extraction conditions, the experimental carboxyl content in the isolated products was equal to 3.71 and 2.96 mmol g −1 for the HSs extracted from peat and lignite, respectively. These values were similar to the results for the reference samples, which were HSs extracted using 0.1 M NaOH, as well as humic acids and sodium humates purchased from Sigma-Aldrich. The qualitative assessment of the products obtained was based on spectroscopic methods, including FTIR, 1 H NMR, and UV−vis. The analyses carried out for the isolated samples revealed the characteristic structures of HSs, including components of aliphatic chains and aromatic core as well as carboxyl, ester, and amino groups. Simultaneously, the results of the spectral ratio of E 280 /E 472 showed the significant differences between the relative amount of lignin for the samples tested.

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Section: Resultsmentioning

confidence: 98%

Application of Alkaline Deep Eutectic Solvents as a Green Alternative to the Traditional Extractants for the Isolation of Humic Substances

Nieweś,

Marecka,

Huculak-Mączka

2024

ACS Omega

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“…The pellets were utilized for the purpose of analyzing the structure of HA and FA. FTIR spectra were obtained within the wavenumber range of 4000–400 cm −1 with a resolution of 4 cm and 16 scans per acquisition 29 .…”

Section: Methodsmentioning

confidence: 99%

Application of artificial neural network and dynamic adsorption models to predict humic substances extraction from municipal solid waste leachate

Rezaeinia

Ebrahimi

Dalvand

et al. 2023

Sci Rep

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Sustainable municipal solid waste leachate (MSWL) management requires a paradigm shift from removing contaminants to effectively recovering resources and decreasing contaminants simultaneously. In this study, two types of humic substances, fulvic acid (FA) and humic acid (HA) were extracted from MSWL. HA was extracted using HCl and NaOH solution, followed by FA using a column bed under diversified operations such as flow rate, input concentration, and bed height. Also, this work aims to evaluate efficiency of Artificial Neural Network (ANN) and Dynamic adsorption models in predicting FA. With the flow rate of 0.3 mL/min, bed height of 15.5 cm, and input concentration of 4.27 g/mL, the maximum capacity of FA was obtained at 23.03 mg/g. FTIR analysis in HA and FA revealed several oxygen-containing functional groups including carboxylic, phenolic, aliphatic, and ketone. The high correlation coefficient value (R2) and a lower mean squared error value (MSE) were obtained using the ANN, indicating the superior ability of ANN to predict adsorption capacity compared to traditional modeling.

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“…Additional information about humic substances is obtained through physical and density fractionation (Kögel-Knabner 2000, 2002. Despite many efforts, HS have been largely unknown in terms of their detailed chemical composition and structure due to their diverse origins, heterogeneity, and variations in diagenetic, environmental, and climatic conditions during their formation (Lapidus et al 2022;Raguraj et al 2022). Li et al (2019) and Ondrasek et al (2019) studied the humic substance fractions and they stressed the coupling relationship between soil organic matter and nutrient cycles.…”

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confidence: 99%

Effect of Grasslands Fertilisation on Soil Organic Matter Quality and Nutrients Status

Plisková,

Pospíšilová,

Nerušil

et al. 2023

Agriculture (Pol'nohospodárstvo)

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Soil organic matter (SOM) represents one of the largest and most important reservoirs of organic carbon in terrestrial eco-systems. The quality of SOM (e.g., content of soil organic carbon, humic substances, humic acids, fulvic acids, and HA/FA ratio) is a key factor in determining soil fertility and productivity. The loss of SOM is currently considered a detrimental form of soil degradation. The study aims to evaluate the effect of mineral fertilising (NPK), farmyard manure, cattle slurry, and digestate applications in intensively used permanent grassland. The long-term field experiments were carried out at the locality Jevíčko, region of Boskovice Furrow Malá Haná (the Czech Republic). The effect of amending soil with different organic and mineral fertilisers was studied. Qualitative parameters of SOM, soil reaction, and the content of available nutrients (N, P, K, Ca, Mg) were followed. Results showed that the control (no organic input) and the NPK variants had the lowest SOM quality. Higher SOM quality was after the farmyard manure, Slurry, and Digetsate applications. The highest acidity (indicated by the lowest values of pH/KCl) was determined in the control, NPK, Slurry, and D variants. The most favourable soil reaction and available nutrient content were after the farmyard manure application. Humic substances spectral absorption in the UV-VIS and infrared spectral ranges showed that the highest absorbance and amount of aliphatic hydrophobic components were observed after the application of farmyard manure. The multi-criteria statistical evaluation, including principal component analysis and factor analysis, confirmed that amending soil with farmyard manure and slurry resulted in an increase in humic substances content and improved SOM quality.

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A comparative study of tea waste derived humic-like substances with lignite-derived humic substances on chemical composition, spectroscopic properties and biological activity

Cited by 11 publications

References 52 publications

Application of Alkaline Deep Eutectic Solvents as a Green Alternative to the Traditional Extractants for the Isolation of Humic Substances

Application of Alkaline Deep Eutectic Solvents as a Green Alternative to the Traditional Extractants for the Isolation of Humic Substances

Application of artificial neural network and dynamic adsorption models to predict humic substances extraction from municipal solid waste leachate

Effect of Grasslands Fertilisation on Soil Organic Matter Quality and Nutrients Status

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