Studying of the interaction between peat humic acids and metazachlor using spectroscopy methods

Bejger, Romualda; Mielnik, Lilla; Włodarczyk, Małgorzata; Nicia, Paweł

doi:10.1007/s11368-018-1917-3

Cited by 9 publications

(11 citation statements)

References 32 publications

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“…Soil organic matter (SOM) is a significant factor affecting the behavior of organic contaminants in soils [9,11,12,[17][18][19][20][21][22][23][24]. According to Pignatello [19], the mechanism of PAH sorption to organic matter can be caused by van der Waals attraction, hydrophobic bonding, hydrogen interactions, charge transfer, intermolecular forces, or ligand exchange.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Organic Matter on Polycyclic Aromatic Hydrocarbon (PAH) Availability and Persistence in Soils

Ukalska‐Jaruga

Smreczak

2020

Molecules

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Polycyclic aromatic hydrocarbons (PAHs) exhibit persistence in soils, and most of them are potentially mutagenic/carcinogenic and teratogenic for human beings but also influence the growth and development of soil organisms. The PAHs emitted into the atmosphere are ultimately deposited (by dry or wet deposition processes) onto the soil surface where they tend to accumulate. Soil organic matter (SOM) plays an important role in the fate and transformation processes of PAHs, affecting their mobility, availability, and persistence. Therefore, the aim of this research was to investigate the influence of SOM fractional diversification (fulvic acids—FA, humic acids—HA, and humins—HN) on PAH availability and persistence in soils. Twenty soil samples (n = 20) were collected from upper horizons (0–30 cm) of agricultural soils exposed to anthropogenic emissions from industrial and domestic sources. The assessment of PAH concentrations included the determination of medium-molecular-weight compounds from the US EPA list: fluoranthene—FLA, pyrene—PYR, benz(a)anthracene—BaA, and chrysene—CHR. The assessment was conducted using the GC-MS/MS technique. Three operationally defined fractions were investigated: total extractable PAHs (TE-PAHs) fraction, available/bioavailable PAHs (PB-PAHs) fraction, and nonavailable/residual PAHs (RE-PAHs) fraction, which was calculated as the difference between total and available PAHs. TE-PAHs were analyzed by dichloromethane extraction, while PB-PAHs were analyzed with a hydrophobic β-cyclodextrin solution. SOM was characterized by total organic carbon content (Turin method) and organic carbon of humic substances including FA, HA, HN (IHSS method). Concentrations of PAHs differed between soils from 193.5 to 3169.5 µg kg−1, 4.3 to 226.4 µg kg−1, and 148.6 to 3164.7 µg kg−1 for ∑4 TE-PAHs, ∑4 PB-PAHs, and ∑4 RE-PAHs, respectively. The ∑4 PB-PAHs fraction did not exceed 30% of ∑4 TE-PAHs. FLA was the most strongly bound in soil (highest content of RE-FLA), whereas PYR was the most available (highest content of PB-PYR). The soils were characterized by diversified total organic carbon (TOC) concentration (8.0–130.0 g kg−1) and individual SOM fractions (FA = 0.4–7.5 g kg−1, HA = 0.6–13.0 g kg−1, HN = 0.9–122.9 g kg−1). FA and HA as the labile fraction of SOM with short turnover time strongly positively influenced the potential ∑4 PAH availability (r = 0.56 and r = 0.52 for FA and HA, respectively). HN, which constitutes a stable fraction of organic matter with high hydrophobicity and poor degradability, was strongly correlated with ∑4 RE-PAHs (r = 0.75), affecting their persistence in soil.

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Section: Introductionmentioning

confidence: 99%

The Impact of Organic Matter on Polycyclic Aromatic Hydrocarbon (PAH) Availability and Persistence in Soils

Ukalska‐Jaruga

Smreczak

2020

Molecules

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“…Soil organic matter consists of a diversity of components with various molecular weights, functional groups and polarities, which control the dynamics of contaminants in the soil through hydrophobic interactions, electrostatic interactions or the formation of chemical bonds (Pignatello 2011;Pignatello 2012;Chen et al 2017;Bejger et al 2018;Ukalska-Jaruga et al 2018). According to Pignatello (2011Pignatello ( , 2012, the main components of SOM are humic substances (HS) and black carbon (BC), and based on their molecular structure, they may significantly impact PAH concentration.…”

Section: Introductionmentioning

confidence: 99%

Soil organic matter composition as a factor affecting the accumulation of polycyclic aromatic hydrocarbons

2018

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Purpose The objective of this study was to evaluate the mutual relations between the soil organic matter (SOM) fractions: fulvic acids (FA), humic acids (HA), humins (HN), black carbon (BC) and the polycyclic aromatic hydrocarbons (PAH) accumulation level in agricultural soils influenced by historical and actual anthropopressure. The research allowed to indicate which fractions of SOM are the major sequestration sinks for PAHs after they are naturally introduced into the soil. Materials and methods Soil samples were collected from the upper layer of agricultural soils (n = 41), and basic physicochemical properties (pH KCl , total carbon, total nitrogen and clay content) were determined. The SOM was characterised by the total organic carbon content and humic substances, including HA, FA and HN, determined by an adapted method recommended by the International Humic Substances Society. The extracts of HA and FA were analysed for carbon content using a liquid CN analyser, while HN constituted the soil carbon in the residue after FA and HA extraction. The content of BC was analysed by dry combustion at 375°C for 24 h (CTO375); the remaining carbon was determined via combustion in an elemental analyser. Results and discussion In all soils, significant positive relations between PAH concentrations and TOC content (r = 0.73, p < 0.001) as well as HN (r = 0.71, p < 0.001) and BC (r = 0.86, p < 0.001) were noted. Relations among PAHs, HN and BC were statistically significant only in soils with TOC content ≥ 12 g kg −1 , while they were not observed for soils with TOC content < 12 g kg −1. The links between HN and PAHs were stronger for low-molecular (two and three rings)-weight PAHs (r = 0.77, p < 0.05) than for high-molecular (≥ four rings) PAHs (r = 0.68, p < 0.05). Contrary to HN, the BC faction showed higher correlations with high-molecular-weight PAHs (r = 0.92, p < 0.001). FA and HA showed no significant relationship with hydrocarbons. Conclusions Different SOM fractions might possess divergent binding capabilities and dissimilar binding strengths to PAHs. The different proportions and sorption capacities of BC and HN in relation to PAHs of different molecular weight are the result of varying structure, i.e. polar and non-polar functionalities in sorption domains and pore-size structures of these fractions. The high correlation between BC and higher-molecular PAHs may be a result of their co-emission, while the stronger relationships between HN and lower-molecular PAHs are directly related to their higher mobility and easier diffusion to stable SOM fractions.

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“…From a chemical point of view, HS are heteropolycondensates or complex polyanions ( Stevenson, 1994 ). However, from a physical point of view, they are polydisperse substances ( Matuszak-Slamani et al, 2017 ; Bejger et al, 2018 ; Ukalska-Jaruga, Debaene & Smreczak, 2018 ), with a wide range of molecular structure sizes. The HS have a range of specific chemical and physical properties, such as: a high sorption capacity ( Ukalska-Jaruga et al, 2015 ; Ćwieląg-Piasecka et al, 2018 ), and high energy absorption in the whole spectrum range, especially in the UV and IR radiation ranges of the electromagnetic spectrum ( Fooken & Liebezeit, 2003 ; Gołębiowska et al, 2005 ; Mielnik & Kowalczuk, 2018 ; Rodríguez, Schlenger & García-valverde, 2016 ; Shin, Monsallier & Choppin, 1999 ).…”

Section: Introductionmentioning

confidence: 99%

The effects of humic substances on DNA isolation from soils

Wnuk

Waśko

Walkiewicz

et al. 2020

PeerJ

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Background Humic substances (HS) are compounds with a complicated structure, present in the humus soil layer, water, lake sediments, peat, brown coal and shales. Due to their similar physicochemical properties to DNA, they may have an adverse effect on the subsequent use of the isolated material. The main aim of this research was to examine the effect of HS on DNA isolation depending on the soil type and land use, taking into account the spectroscopic full characteristics of HS fractions. Methods The research was conducted on eight types of soil sample. Soils represented the most important Soil Reference Groups for temperate climates: Fluvisols, Regosols, Cambisols, Arenosols, Histosols and Luvisols. Soil samples were also collected from areas diversified in terms of use: arable land, grassland and forest. The extraction of HS fractions was performed using the procedure recommended by the International HS Society. The fractional composition of HS was characterized by UV–Vis and fluorescence methods. Soil DNA is extracted by direct cell lysis in the using a CTAB-based method with a commonly-used commercial soil DNA isolation kit. The basis for assessing the quantity and quality of extracted DNA was the Polymerase chain reaction (PCR) reaction since the analysis of soil DNA often relies on the use of PCR to study soil microorganisms. Results Based on the results, it can be concluded that in the presence of a high concentration of HS, the isolated DNA was low quality and the additional purification procedure was necessary. Despite the differentiation of the internal structure of HS fractions, the decisive factor in the efficiency of DNA isolation from soil samples was the total carbon content in HS. Reduced DNA yields can significantly constrain PCR detection limits to levels inadequate for metagenomic analysis, especially from humus-rich soils.

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Studying of the interaction between peat humic acids and metazachlor using spectroscopy methods

Cited by 9 publications

References 32 publications

The Impact of Organic Matter on Polycyclic Aromatic Hydrocarbon (PAH) Availability and Persistence in Soils

The Impact of Organic Matter on Polycyclic Aromatic Hydrocarbon (PAH) Availability and Persistence in Soils

Soil organic matter composition as a factor affecting the accumulation of polycyclic aromatic hydrocarbons

The effects of humic substances on DNA isolation from soils

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