Chemical and spectroscopic characterization of humic acids isolated from different Slovak soil types

Barančíková, Gabriela; Senesi, N.; Brunetti, Gennaro

doi:10.1016/s0016-7061(97)00033-5

Cited by 116 publications

(48 citation statements)

References 15 publications

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“…On the basis of C HA /C FA and Q The basic chemical parameter for humic acid is elemental analysis. As you can see from Table 4, the highest content of C and the lowest content of H and also the lowest H/C ratio characteristic of the aromatic structure in HA from Chernozem, Chernitsa and Andosol were found and are typical of these soil types (Barančíková et al 1997b, Barančíková 2002. Metal binding also increased with higher proportions of nonprotonated aromatic carbon (Preston 1996).…”

Section: Characteristic Of Soil Organic Matter In Soil Samplesmentioning

confidence: 96%

The influence of humic acid quality on the sorption and mobility of heavy metals

Barančíková¹,

Makovníková²

2003

Plant Soil Environ.

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Mobile and potentially mobile forms of heavy metals are probably one of the most important toxic hazards in the environment. Besides pH, which is a factor influencing the mobility/availability of heavy metals to the greatest extent, the content and mainly the quality of soil organic matter play a very important role in the evaluation of heavy metal behaviour in the environment. The fraction of metals bound to organic compounds is exclusively associated with humic substances and particularly with humic acids (HA). A relationship between the parameters reflecting the actual structure of humic acids and mobile or potentially mobile fractions of heavy metals was studied in 12 soil localities representing different soil types. It can be stated on the basis of the acquired data that heavy metals tend to form complexes with soil organic matter that are different for each metal. The results suggest that copper is bound mainly in an unavailable form (significant correlations of fraction IV with HA parameters) and cadmium prefers exchangeable forms (significant correlations of fraction I with HA parameters) and is more available. It can be assumed on the basis Spearman's correlations that mobile fractions of cadmium are predominantly bound to the aliphatic part of humic substances, and copper prefers strong bonds to humic acids with a high degree of humification.

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Section: Characteristic Of Soil Organic Matter In Soil Samplesmentioning

confidence: 96%

The influence of humic acid quality on the sorption and mobility of heavy metals

Barančíková¹,

Makovníková²

2003

Plant Soil Environ.

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“…4). The absorption bands were identified based on published data (Stevenson, 1994;Barančíková et al, 1997). The absorbance values belonging to different wavenumbers, i.e., 2925, 1710 and 1620 cm -1 (marked with dashed lines in Fig.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Comparative study on humic substances isolated in thermal groundwaters from deep aquifers below 700 m

et al. 2012

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“…In turn, FA presented a linear enhance on H/C ratio with increase of soil depth. According to Baranciková et al (1997) the diagram of H/C atomic ratio against O/C atomic ratio may be considered as a graphical-statistical representation which indicates the changes in properties occurring during coalification reactions such as oxidation, dehydrogenation, dehydration, demethanation and decarboxylation. The linear relationship of H/C atomic ratio against O/C atomic ratio of humic and fulvic acids (Figure 1) suggest that microbial degradation may be more significant than chemical degradation in the soil during humification process (Lu et al, 2000).…”

Section: Free Fulvic Acid Fulvic Acid Humic Acid Humification Degree mentioning

confidence: 99%

Chemical nature of soil humified fractions and their bioactivity

Canellas

Façanha

2004

Pesq. agropec. bras.

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-The aim of this work was to evaluate the humus composition from an Ultisol from Campos dos Goytacazes, RJ, Brazil. Soil samples of four depths (0-0.05, 0.05-0.10, 0.10-0.20 and 0.20-0.40 m) and its chemical nature were analysed by elemental composition, E 4 /E 6 ratios and Fourier transformed infrared spectroscopy. The bioactivity of these humified substances was evaluated through their action on maize root growth and H + -ATPase activity of root´s microsomes. In topsoil, the content of high condensed alkaline soluble humic substances is greater than that found in the subsuperficial layers. The chemical nature of humic and fulvic acids also varied with the soil depth. The humic acids isolated from the soil samples exhibited higher bioactivity compared with the fulvic acids. Moreover, the results suggest that more condensed humic substances can promote highest stimulation of the microsomal H + -ATPases from maize roots. These data reinforce the concept that the activity of the H + pumps can be used as a biochemical marker for evaluation of humic substances bioactivity.Index terms: fulvic acids, humic acids, H + -ATPase. Natureza química do húmus do solo e sua bioatividadeResumo -O objetivo deste trabalho foi avaliar a composição do húmus de um Argissolo Amarelo de Campos dos Goytacazes, RJ, Brasil. Amostras de solo de quatro profundidades (0-0,05, 0,05-0,10, 0,10-0,20 e 0,20-0,40 m) foram analisados mediante o fracionamento químico da matéria orgânica. As frações ácidos húmicos e fúlvicos foram extraídas e sua natureza química avaliada por meio da composição elementar, relação E 4 /E 6 e espectroscopia de infravermelho transformada de Fourier. A bioatividade das substâncias húmicas foi avaliada mediante sua ação sobre o crescimento radicular de plântulas de milho e atividade da H + -ATPase da fração microssomal das raízes. Os resultados mostraram que é maior o conteúdo de substâncias húmicas alcalino solúveis mais condensadas na camada superficial do solo. A natureza química dos ácidos húmicos e fúlvicos também variou com a profundidade do solo. Os ácidos húmicos isolados das amostras de solo apresentaram maior bioatividade quando comparados aos ácidos fúlvicos, por meio da avaliação do crescimento radicular e da atividade de bombeamento de H + pela fração microssomal de células das raízes. Os dados reforçam o conceito de que a atividade das bombas de H + pode ser usada como marcador bioquímico da bioatividade das substâncias húmicas.Termos para indexação: ácidos húmicos, ácidos fúlvicos, H + -ATPase.

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Chemical and spectroscopic characterization of humic acids isolated from different Slovak soil types

Cited by 116 publications

References 15 publications

The influence of humic acid quality on the sorption and mobility of heavy metals

The influence of humic acid quality on the sorption and mobility of heavy metals

Comparative study on humic substances isolated in thermal groundwaters from deep aquifers below 700 m

Chemical nature of soil humified fractions and their bioactivity

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