Selective sorption and desorption of DOM in podzol horizons — FTIR and Py-GC/MS of leachates from a column experiment

Santos, Sara Ramos Dos; Schellekens, Judith; Silva, Wilson Tadeu Lopes da; Buurman, P.; Boim, Alexys Giorgia Friol; Vidal‐Torrado, Pablo

doi:10.1016/j.scitotenv.2022.154144

Cited by 8 publications

(3 citation statements)

References 69 publications

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“…The S 275-295 in treated water was positively correlated with both the breast cancer incidence and the mortality (r = 0.97, p < 0.01 and r = 0.43, p > 0.05, respectively), while it was negatively correlated with the CTI (r = −0.40, p > 0.05), indicating that the breast-cancerprotective effect of lignin-related components may also be associated with anti-proliferative properties. The FTIR spectra of DOM further confirmed the widespread nature of ligninrelated components in the study area (Figure S11), with the absorption peaks referring to the O-H and C-O groups of phenols (1420 cm −1 ) and the aromatic C-H of the guaiacyl units in lignin (1140, 860, and 810 cm −1 ) [56][57][58][59][60]. Interestingly, the relative intensities of the major lignin-characterized peaks (i.e., 1140 and 860 cm −1 ) showed negative correlations with the breast cancer incidence and mortality, as well as positive correlations with the CTI (Figure S12).…”

Section: Identification Of Key Dom With Breast-cancer-associated Prop...supporting

confidence: 53%

Identification of Breast-Cancer-Associated Properties of Drinking Water under a Composite-Toxicity Perspective of Mixed Contaminants: A Case Study in a High-Prevalence Area of China

Peng,

Dong,

Gong

et al. 2024

Water

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Breast cancer is the most frequently diagnosed female cancer worldwide. Environmental contaminant exposure is suspected to be crucial, but the broad-spectrum communal properties that these suspected contaminants all share remain to be explored, especially in source and drinking water. In this work, we focused on the Pearl River Basin, which has the highest breast cancer incidence and mortality in China, and hypothesized that the breast cancer risk in this area is associated with its water source. Our objective was to resolve the possible communal properties that are associated with breast cancer from water mixture extracts of source and drinking water and to identify the key drivers by utilizing the latest epidemiology data, performing an exhaustive water toxicological and chemical characterization, and combining partial least-squares path statistics modeling (PLS-PM). We proposed a path for a drinking water-toxicity-induced breast cancer risk and confirmed its association with estrogen-receptor- and thiol-depletion-relevant mechanisms. The breast cancer incidence risk was associated with water-mixture-promoted mammalian cell proliferation (i.e., estrogenic effect), while the mortality risk was associated with a greater thiol depletion (i.e., oxidative stress). Endocrine-disrupting chemicals (EDCs) and dissolved organic matter (DOM) from anthropogenic sources in drinking water are key drivers for estrogenic effects and oxidative stress, respectively. The PLS-PM standardized effects of the DOM and EDCs in treated water on the breast cancer incidence and mortality were −0.07 and 0.31, and 0.35 and 0.31, respectively, further revealing that EDCs strongly influence the incidence risk, whereas the mortality risk resulted from the joint effects of EDCs and DOM. This study clearly shows an association between the breast cancer risk and drinking water toxicity in a high-prevalence area of China, broadening the future perspectives for water-contaminant-specific breast cancer prevention research.

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Section: Identification Of Key Dom With Breast-cancer-associated Prop...supporting

confidence: 53%

Identification of Breast-Cancer-Associated Properties of Drinking Water under a Composite-Toxicity Perspective of Mixed Contaminants: A Case Study in a High-Prevalence Area of China

Peng,

Dong,

Gong

et al. 2024

Water

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“…These results indicated that the microbial origin DOM C3 component mainly consists of low-molecular weight tannins. Moreover, AC selectively sorbs high-molecular weight molecules. − In contrast to the DOM extracted from paddy soils or occurring in overlying water, − the porewater DOM had a significantly lower content of carbohydrates, unsaturated hydrocarbons, and protein/lipid. This was in accordance with the absence of protein-like components in porewater DOM fluorophores.…”

Section: Resultsmentioning

confidence: 99%

Activated Carbon Application Simultaneously Alleviates Paddy Soil Arsenic Mobilization and Carbon Emission by Decreasing Porewater Dissolved Organic Matter

Si,

Wu,

et al. 2024

Environ. Sci. Technol.

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Flooding of paddy fields during the rice growing season enhances arsenic (As) mobilization and greenhouse gas (e.g., methane) emissions. In this study, an adsorbent for dissolved organic matter (DOM), namely, activated carbon (AC), was applied to an arsenic-contaminated paddy soil. The capacity for simultaneously alleviating soil carbon emissions and As accumulation in rice grains was explored. Soil microcosm incubations and 2-year pot experimental results indicated that AC amendment significantly decreased porewater DOM, Fe(III) reduction/Fe 2+ release, and As release. More importantly, soil carbon dioxide and methane emissions were mitigated in anoxic microcosm incubations. Porewater DOM of pot experiments mainly consisted of humic-like fluorophores with a molecular structure of lignins and tannins, which could mediate microbial reduction of Fe(III) (oxyhydr)oxides. Soil microcosm incubation experiments cospiking with a carbon source and AC further consolidated that DOM electron shuttling and microbial carbon source functions were crucial for soil Fe(III) reduction, thus driving paddy soil As release and carbon emission. Additionally, the application of AC alleviated rice grain dimethylarsenate accumulation over 2 years. Our results highlight the importance of microbial extracellular electron transfer in driving paddy soil anaerobic respiration and decreasing porewater DOM in simultaneously remediating As contamination and mitigating methane emission in paddy fields.

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“…If the concentrations of heavy metals in the soil are high, their transport may compete with those of the nutrients. Therefore, heavy metals must be fixed by metal chelators in the soil solution to avoid their competition with nutrient transport [35]. Although DOM accounts for a small proportion of the total organic matter (NRM: 1.7%; NRI: 1.9%; RM: 2.2%; RI: 2.5%), as the most active component of SOM, it can chelate heavy metals, thus changing their activities and influencing their migration and transformation.…”

Section: The Contents Of Som and Dommentioning

confidence: 99%

Enhancement of Phytoremediation of Heavy Metal Pollution Using an Intercropping System in Moso Bamboo Forests: Characteristics of Soil Organic Matter and Bacterial Communities

Bian,

Zhang,

et al. 2023

Forests

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Heavy metal pollution in soil is a major global issue, and one effective method for addressing it is phytoremediation through bamboo planting. Nevertheless, there is a notable gap in our knowledge as no studies have explored the characteristics of soil organic matter (SOM) and the bacterial communities in bamboo forests during the remediation process. To bridge this knowledge gap, we conducted research to investigate the impact of different bamboo planting patterns on the SOM characteristics and microbial communities in soils contaminated with heavy metals. The contents of SOM and dissolved organic matter (DOM) in rhizosphere and non-rhizosphere soils differed significantly between monocropping and intercropping systems, with DOM accounting for only 1.7%–2.5% of SOM. Fourier transform infrared spectra showed that the contents of SOM polysaccharides C-O, carbonate C-O, aliphatic methyl, and methylene increased, while the aromatic C=C abundance decreased in the intercropping rhizosphere soil. The differences between bamboo cultivation patterns in the rhizosphere and non-rhizosphere soils were elucidated using the biomarkers, including MND1 and Nitrospira (non-rhizosphere), and Sphingomonas (rhizosphere). Heavy metals, DOM, SOM, and refined organic functional groups, especially C-O in polysaccharides and symmetric carboxylate, were the determining factors of soil bacterial communities. Compared to monocropping, intercropping increased the accumulation of Zn and Cd in bamboo shoots by 35% and 40%, respectively, and hence, intercropping soil, with a low toxicity, was suitable for bamboo shoot sprouting. Intercropping can alter the characteristics of SOM and bacterial communities and plays a vital role in phytoremediation and shoot growth in bamboo forests. Future studies on soil carbon dynamics and nutrient status during heavy metal remediation will improve our knowledge of soil transformation and its impact on soil ecosystem health and productivity.

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Selective sorption and desorption of DOM in podzol horizons — FTIR and Py-GC/MS of leachates from a column experiment

Cited by 8 publications

References 69 publications

Identification of Breast-Cancer-Associated Properties of Drinking Water under a Composite-Toxicity Perspective of Mixed Contaminants: A Case Study in a High-Prevalence Area of China

Identification of Breast-Cancer-Associated Properties of Drinking Water under a Composite-Toxicity Perspective of Mixed Contaminants: A Case Study in a High-Prevalence Area of China

Activated Carbon Application Simultaneously Alleviates Paddy Soil Arsenic Mobilization and Carbon Emission by Decreasing Porewater Dissolved Organic Matter

Enhancement of Phytoremediation of Heavy Metal Pollution Using an Intercropping System in Moso Bamboo Forests: Characteristics of Soil Organic Matter and Bacterial Communities

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