Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu, Hongtao

doi:10.1016/j.scitotenv.2016.05.023

Cited by 26 publications

(20 citation statements)

References 31 publications

(34 reference statements)

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“…In our study, the HA/FA ratio varied from 0.32 to 3.90 and from 0.28 to 10.29 for grasslands and arable lands, respectively, indicating differences in the intensity of OC humification processes and mobility of C in the soils (Figure 4a,b). Our results correspond to studies Watanabe, Rumbanraja, Tsutsuki, and Kimura (2001), You et al (2014), Shen et al (2014), Guimaraes et al (2013) and Liou (2016) which noted that the broad range of values could be related to high heterogeneity of organic residues remaining at different sites. The higher proportion of HA/FA for grassland soils indicated higher humification rates.…”

Section: Humic Substances Under Different Land Usesupporting

confidence: 91%

“…(), Guimaraes et al. () and Liou () which noted that the broad range of values could be related to high heterogeneity of organic residues remaining at different sites. The higher proportion of HA/FA for grassland soils indicated higher humification rates.…”

Section: Discussionmentioning

confidence: 98%

“…Humic substances improve soil buffering capacity, increase water retention and supply plants with available macro-and micronutrients (Baldock & Nelson, 2000;Tan, 2014;Zhang & He, 2004). The refractory nature of HS contributes to their persistence, as well as their essential role in nutrient flows through ecological systems in soils (Baldock & Nelson, 2000;Liou, 2016;Ukalska-Jaruga, Smreczak, Klimkowicz-Pawlas, & Maliszewska-Kordybach, 2015;Zhang & He, 2004). Humic substances can be divided into three main fractions according to their mobility and reactivity in soils: fulvic acids (FA), humic acids (HA) and humins (HUM) (Baldock & Nelson, 2000;Moraes, Xavier, Mendonca, Araujo Filho, & Oliveira, 2011;Ukalska-Jaruga et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of organic matter fractions in the top layer of soils under different land uses in Central‐Eastern Europe

Ukalska‐Jaruga

Klimkowicz‐Pawlas

Smreczak

2019

Soil Use and Management

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The objective of this study was to investigate differences in organic matter fractions, such as dissolved organic carbon and humic substances, in soils under different land uses. Soil samples were collected from the upper layer of arable lands and grasslands. Humic substances (HS) were chemically fractionated into fulvic acids (FA), humic acids (HA) and humins (HUM), and based on the separated fractions, the humification index (HI) and the degree of HS transformation (DT) were calculated. Dissolved organic carbon (DOC) was determined by cold (CWE) and hot water (HWE) extractions. Regardless of land use, the results indicated significant differences in soil organic carbon (SOC) and HS composition, with HA and HUM as the dominant fractions. Total SOC was higher in grassland (median = 17.51 g kg−1) than arable soils (median = 9.98 g kg−1); the HI and DT indices did not differ significantly between land uses (HI = 0.3–10.3 and DT = 0.2–6.2 for grasslands, p > 0.05; HI = 0.3–3.9 and DT = 0.2–20.1 for arable lands, p > 0.05). This indicates the relatively high stability of organic carbon and efficient humification processes in both land uses. Additionally, in arable soils lower CWE‐C (0.75 g kg−1) and higher HWE‐C (2.59 g kg−1) than in grasslands (CWE‐C = 1.13 g kg−1, HWE‐C = 1.60 g kg−1) can be related to farming practice and application of soil amendments. The results showed that both labile and humified organic matter are better protected in grassland soils and are consequently less vulnerable to mineralization.

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Section: Humic Substances Under Different Land Usesupporting

confidence: 91%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Characterization of organic matter fractions in the top layer of soils under different land uses in Central‐Eastern Europe

Ukalska‐Jaruga

Klimkowicz‐Pawlas

Smreczak

2019

Soil Use and Management

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“…Copper content in soils amounts to an average of 2-40 mgCu kg -1 (Kabata-Pendias and Pendias 2011). Copper binds mainly with organic substances and Mn and Fe oxides, as well as silicates (Liu, 2016). In the series without additives, the average content of Cu was 19% higher in soils with Cr(I-II) than in pots with Cr(VI).…”

Section: Influence Of Cr(iii) and Cr(vi) On Contents Of Heavy Metals mentioning

confidence: 95%

Chemical Composition of Soil Contaminated with Tri- and Hexavalent Chromium Amended with Compost, Zeolite and Calcium Oxide

Radziemska

Wyszkowski

2017

pjss

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“…The percentages and proportions of individual organic matter fractions characterize the overall SOM transformation in soils. The S-SOM to E-SOM ratio describes the predominant processes of organic matter transformation and reflects the mobility and quality of SOM (Guimaraes et al 2013;Tan 2014;Liu 2016;Ukalska-Jaruga et al 2019a). In our study, the statistically significant (p = 0.023, F = 7.73) higher proportions of S-SOM/E-SOM ratio in soils without biochar (1.02 to 1.46) compared to soils with biochar addition (0.42 to 1.20) suggest that biochar may reduce the degree of SOM humification and polymerization.…”

Section: Effect Of Ercm-biochar Application On Som Contentmentioning

confidence: 99%

Dissipation and sorption processes of polycyclic aromatic hydrocarbons (PAHs) to organic matter in soils amended by exogenous rich-carbon material

2019

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Purpose The aim of the research was to assess the effect of biochar addition on aging, degradation, and sorption processes of polycyclic aromatic hydrocarbons (PAHs) to soil organic matter. The study was carried out as a sorption experiment in strictly controlled water and air conditions, which allowed for the accurate observation and prediction of PAH behavior in soils. Materials and methods Four soils were fortified with a PAH mixture (Fluorene-Flu, Anthracene-Ant, Phenanthrene-Phe, Pyrene-Pyr, Chrysene-Chry) at 20 mg kg −1 of single-compound concentration level. The experiment was carried out in two trials: soils + 5PAHs amended with biochar and soil + 5PAHs without biochar addition with incubation times of 0, 1, 3, 6, and 9 months. After each interval time, the extractable (E-SOM) and stable organic matter (S-SOM) were measured as well as PAHs determined in two forms: total concentration (PAH-tot) and residual concentration (PAH-rest) after E-SOM extraction. The PAH loss and halflife times were estimated according to pseudo first-order kinetics equation. Results and discussion The amounts of PAH-tot in the soils without biochar decreased by an average of 92%, while in soil with biochar, this was 41% after 9 months of aging. The amount of PAHs-rest bounded with S-SOM after 9 months of incubation varied from 0.9 to 3.5% and 0.2 to 1.3% of the initial PAH concentration, respectively, for soils non-induced and induced by biochar. In soils without biochar, Flu, Ant, Phe, and Pyr exhibited similar T 1/2 (43-59 days), but Chry was characterized by a much higher and broader T 1/2 than other hydrocarbons (67-280 days). Biochar addition to the soils significantly influenced the half-life changes for all PAHs. The highest changes were noted for Phe (14-fold increase), and the lowest was for Flu (7-fold increase). Conclusions The addition of exogenous-rich carbon material such as biochar to the soil significantly changes the behavior and sorption potential of PAHs in the soil. Soils enriched with biochar are characterized by a higher persistence of PAHs, longer aging time, and lower affinity for sorption by native organic matter structures. Soils freshly polluted by PAH are mainly sorbed by E-SOM, which significantly increases their accessibility and reduces formation of bound-residues in the soil.

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Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Cited by 26 publications

References 31 publications

Characterization of organic matter fractions in the top layer of soils under different land uses in Central‐Eastern Europe

Characterization of organic matter fractions in the top layer of soils under different land uses in Central‐Eastern Europe

Chemical Composition of Soil Contaminated with Tri- and Hexavalent Chromium Amended with Compost, Zeolite and Calcium Oxide

Dissipation and sorption processes of polycyclic aromatic hydrocarbons (PAHs) to organic matter in soils amended by exogenous rich-carbon material

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