Characterization of Humic Acids from Raised Bog Peat

Kļaviņš, Māris; Purmalis, Oskars

doi:10.2478/ljc-2013-0010

Cited by 9 publications

(8 citation statements)

References 28 publications

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“…The spectra are typical of peat material, with high absorption in the wavenumber regions 3400-3200, 3000-2800 and 1800-800 cm À1 . These absorptions are characteristic of functional groups in polysaccharides, aliphatics, lignin and other aromatics, organic acids (compounds carrying C=O in acidic groups such as carboxylates), and OH vibrations (from polysaccharides, water and clays) (Cocozza et al 2003;Zaccone et al 2007;Artz et al 2008;Neves Fernandes et al 2010;Krumins et al 2012;Silamikele et al 2012;Klavins & Purnalis 2014;Heller et al 2015; and references in Table S1). Lower absorbance was recorded in the 800-400 cm À1 region, likely corresponding to carbohydrates, lignin and minerals (mostly silicates).…”

Section: Spectral Signalmentioning

confidence: 99%

9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR‐ATR

Cortizas

Sjöström

Ryberg

et al. 2021

Boreas

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Store Mosse (the 'Great Bog' in Swedish) is one of the most extensive bog complexes in southern Sweden (~77 km 2 ), where pioneering palaeoenvironmental research has been carried out since the early 20th century. This includes, for example, vegetation changes, carbon and nitrogen dynamics, peat decomposition, atmospheric metal pollution, mineral dust deposition, dendrochronology, and tephrochronology. Even though organic matter (OM) represents the bulk of the peat mass and its compositional change has the potential to provide crucial ecological information on bog responses to environmental factors, peat OM molecular composition has not been addressed in detail. Here, a 568-cmdeep peat sequence was studied at high resolution, by attenuated reflectance Fourier-transform infrared spectroscopy (FTIR-ATR) in the mid-infrared region (4000-400 cm -1 ). Principal components analysis was performed on selected absorbances and change-point modelling was applied to the records to determine the timing of changes. Four components accounted for peat composition: (i) depletion/accumulation of labile (i.e. carbohydrates) and recalcitrant (i.e. lignin and other aromatics, aliphatics, organic acids and some N compounds) compounds, due to peat decomposition; (ii) variations in N compounds and carbohydrates; (iii) residual variation of lignin and organic acids; and (iv) residual variation of aliphatic structures. Peat decomposition showed two main patterns: a long-term trend highly correlated to peat age (r = 0.87), and a short-term trend, which showed five main phases of increased decomposition (at ~8.4-8.1, ~7.0-5.6, ~3.5-3.1, ~2.7-2.1 and ~1.6-1.3 ka)mostly corresponding to drier climate and its effect on bog hydrology. The high peat accumulation event (~5.6-3.9 ka), described in earlier studies, is characterized by the lowest degree of peat decomposition of the whole record. Given that FTIR-ATR is a quick, nondestructive, cost-effective technique, our results indicate that it can be applied in a systematic way (including multicore studies) to peat research and provide relevant information on the evolution of peatlands.

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Section: Spectral Signalmentioning

confidence: 99%

9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR‐ATR

Cortizas

Sjöström

Ryberg

et al. 2021

Boreas

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“…In order to eliminate mineral present in peat samples Machado et al [85] washed peat samples by using 0.145 M HCl for an hour, allowed to settle for 24h at 4 °C. In turn, according to Klavins and Purmalis [86], [87], Klavins et al [88] peat was treated by 0.1 M HCl solution for an hour. The obtained slurry was allowed to settle and supernant was decanted and discarded.…”

Section: Extraction Of Humic and Fulvic Substances From Peatmentioning

confidence: 99%

“…In order to reduce the presence of mineral particles in solid residue Machado et al [85], Klavins and Purmalis [86], [87], Lodygin et al [80], Lestari [96], Klavins et al [88] the solid part after centrifugation was suspended in a mixture of 0.1 M HCl and 0.3 M HF. This process was repeated until the ash content of HS was reduced to 2 % [86]- [88] or until the ash content of HA is < 1 % [96].…”

Section: Ha Fraction Purificationmentioning

confidence: 99%

Potential of Baltic Region Peat in High Added-value Products and Environmentally Friendly Applications - A Review

Krūmiņš¹,

Kļaviņš²,

Tumilovich³

et al. 2021

Preprint

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The present review is dedicated to using of peat on the example of fen peat in high added-value products and applications. Mainly, but not limited, last decade literature was analysed from the perspective of innovation potential of peat applications in environmental technologies on examples of studies from the Baltic Sea region. Paper covers a wide range of applications of peat products started from agriculture to medicine and cosmetics. A separate chapter is devoted to the deep-processed peat product - humic substances (humate, humic and fulvic salts and acids). Generalised dependence of product extraction rate and its properties, depending on the process parameters are provided. Widely are described applications of the humic sub-stance applications covering economic aspects, such as production costs. In the last chapter of the review are given recommendations for applications considering the most recent trends of peat-based product developments. This accumulated information could be useful for future production, development of new, environmentally friendly products and start-ups establishment.

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“…Besides, it is biodegradable, has a low cost, and excellent sipping capability (133). Peat is formed from the partial decomposition of mosses and other living materials such as grasses, shrubs, reeds, or even trees under flooding conditions (134). Peat is found on approximately 1-2% of the Earth's surface (135).…”

Section: Peatmentioning

confidence: 99%

Up-and-coming oil-sorbing green fibers: A text mining study

Santos¹,

Souza²

2021

BJEDIS

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Oil is a crucial raw material, preferably transported by sea. Thus, spills frequently take place in the ocean. Several alternatives have already been investigated to combat these disasters. This paper discusses the possibility of using lignocellulosic fibers for environmental recovery via the sorption of oil spilled in accidents. The data search was performed using Google Scholar. The obtained results allowed the choice of four fibers: coconut, sisal, peat, and kapok. The retrieved reference numbers were 8.360, 6.360, 6.360, and 2.380 for coconut, sisal, peat, and kapok fibers. There was no period restriction. Ten papers with significant results were chosen, and their main results are presented here. All fibers are renewable, besides presenting low cost and excellent sorption capability compared to polypropylene (commercial material) equal to 6 to 10 g/g of oil per gram of the sorber.

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Characterization of Humic Acids from Raised Bog Peat

Cited by 9 publications

References 28 publications

9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR‐ATR

9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR‐ATR

Potential of Baltic Region Peat in High Added-value Products and Environmentally Friendly Applications - A Review

Up-and-coming oil-sorbing green fibers: A text mining study

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