Effects of selected chemical and physicochemical properties of humic acids from peat soils on their interaction mechanisms with copper ions at various pHs

Boguta, Patrycja; D’Orazio, Valeria; Sokołowska, Z.; Senesi, N.

doi:10.1016/j.gexplo.2016.06.004

Cited by 54 publications

(42 citation statements)

References 23 publications

(23 reference statements)

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“…According to authors [22,23], ω is an objective parameter of oxidation, which considers all the elemental composition, so in this case values for both primary and secondary effluent indicate a high degree of oxidation, which confirms the high level of humifiaction [22,23]. * in original research [20] because of high ash contents molar ratios were not calculated for these samples.…”

Section: Resultsmentioning

confidence: 92%

The comparison of fulvic acids extracted from the primary and secondary effluent

Łomińska-Płatek

Anielak

2018

E3S Web Conf.

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Abstract.As is well known without organic matter, there would be no life. Organic compounds perform very important functions in the whole ecosystem as: structural, storage, transport, catalyse reactions, immune and regulatory functions. One of the most important for both living and nonliving organic matter is their role in the biogeochemical cycles of carbon, phosphorus, nitrogen and others elements. The major form of organic matter are humic substances (HS) which are a mixture of high molecular weight organic compounds with variable composition. Humic substances can be divided into: humic acids (HA), fulvic acids (FA) and humins (Hu). In the presented research FA were studied. They were extracted from the effluent in the process of ion exchange in a hydrophobic ion exchanger and then they were examined by qualitative analysis to determine the elemental composition of acids and the degree of contamination with heavy metals and other substances. The main aim was to balance and assess the amount of FA in the primary and secondary effluent. The studies have shown that concentration of FA in raw wastewater (primary effluent) was bigger than in the treated wastewater (secondary effluent). Based on the research, it can be stated that selected WWTP discharges less FA compared to the input pollution load.

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Section: Resultsmentioning

confidence: 92%

The comparison of fulvic acids extracted from the primary and secondary effluent

Łomińska-Płatek

Anielak

2018

E3S Web Conf.

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“…This did not exclude in general the interaction with organic rich colloids as reported by the cited literature, but highlighted the huge heterogeneity of mobility patterns that are possible for metal-colloid complexes. Several studies are available in the literature concerning interaction of metals with organic and inorganic matter [19,[30][31][32][33]. Although the majority of them deal with case studies on real scale or with higher concentration ranges, some comparisons are still possible with the obtained results.…”

Section: Comparison Of Results With the Literaturementioning

confidence: 99%

“…This means that the quality of the released humic and fulvic substances was changing over time. Several studies have shown quenching of fluorescence related to metals and mainly Cu binding to HA-like fluorophores [19,26]. In the collected leachates, Cu concentration was never above 1 µM and the quenching due to Cu could not be higher than 10% of the total fluorescence intensity [18].…”

Section: Role and Nature Of Colloidal Aggregatesmentioning

confidence: 90%

“…The displacement was attributable to the presence of higher conjugation in the aromatic system as well as to the presence of auxochromes functional groups. The increase in ex-em wavelengths was also associated with higher molecular weight distribution and "humic" character of the fluorophores [19,20]. Further information was obtained via the 1 H-NMR spectra of the leachates collected at days 6.5, 8.5, 9.5, plotted in Figure 5.…”

Section: Spectroscopic Characterization Of Released Soil Colloidsmentioning

confidence: 96%

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Colloidal Mobilization and Fate of Trace Heavy Metals in Semi-Saturated Artificial Soil (OECD) Irrigated with Treated Wastewater

et al. 2016

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Abstract:The mobility of selected heavy metals in trace concentrations was investigated in a standard OECD soil irrigated with the effluent of a real municipal wastewater treatment plant. While Cd, Cu and Ni accumulation-migration patterns were mainly influenced by the mobility of colloids generated from soil organic and inorganic matter, Zn mobility was more influenced by the wastewater content of dissolved organic matter and by its salinity. Metal accumulation caused by interaction with colloids resulted in contamination peaks both in different zones of the soil column and in the leaching solution. The release of metals in the leachate was correlated to the contemporary release of silicates from kaolinite and dissolved organic matter, identified through UV absorbance and chemical oxygen demand monitoring. The hypothesized colloidal mobilization was confirmed by spectroscopic studies. The highly heterogeneous complexes of organic and inorganic molecules responsible for metal transport through soil appeared to be structured in highly stable micellar aggregates.

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“…A detailed characterization of HA and their manifold processes in the environment requires the application of several analytical tools combined with chemical, and spectroscopic methods. In recent years, the most common techniques used to obtain structural and compositional information on the HAs include elemental analysis, visible, infrared spectroscopies, nuclear magnetic resonance, and fourier transform ion cyclotron resonance mass spectrometry, which has been proven to be quite useful as well (Boguta et al, 2016). However, according to some recent studies on the analysis of humic acid, it is quite difficult to employ such spectrometry because of the many complicated signals originated from the decomposition of the humic acid.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Humic Acids from Trees and Soils Analyzed by the NICA-Donnan Model and UV-Vis Spectrum

Shoji

Iwase

2017

J. Chem. Eng. Japan / JCEJ

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Chemical and instrumental analysis of humic acids (HAs) from four kinds of trees and soils in which the same trees were planted are performed using a chemical equilibrium model and UV-vis spectroscopies. First, the bindings of protons and copper ions to three types of binding sites in HAs were analyzed using the NICA-Donnan model. The model was used to formulate the binding of copper ions to HA at various pHs. The degree of darkness of the HAs, representing the number of the chromophores, including carboxyl and phenolic groups, are depended on the maximum adsorption quantities of copper ions analyzed by the equilibrium model. Therefore, we can partly estimate the copper adsorption amounts of humic acid by only using UV-vis spectroscopic analysis without employing further instrumental analysis or copper adsorption isotherm experiments.

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Effects of selected chemical and physicochemical properties of humic acids from peat soils on their interaction mechanisms with copper ions at various pHs

Cited by 54 publications

References 23 publications

The comparison of fulvic acids extracted from the primary and secondary effluent

The comparison of fulvic acids extracted from the primary and secondary effluent

Colloidal Mobilization and Fate of Trace Heavy Metals in Semi-Saturated Artificial Soil (OECD) Irrigated with Treated Wastewater

Characterization of Humic Acids from Trees and Soils Analyzed by the NICA-Donnan Model and UV-Vis Spectrum

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