Effects of perfluoroalkyl substances on soil respiration and enzymatic activity: differences in carbon chain-length dependence

Lv, Ming; Xie, Yangyang; Yu, Hui; Sun, Tao; Song, Liping; Wang, Fenghua

doi:10.1080/03601234.2022.2047563

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…Moreover, there was a significantly positive correlation of NAG activity with the litter decomposition (R = 0.30, p = 0.00023, Figure 5c). Previous studies have also demonstrated that the addition of PFAS with various chain lengths did not influence the activities of these four enzymes [21,27], and the negligible effect of PFBS on soil sucrase activity was also reported by another study [50]. Exogenous organic materials acted as the main N suppliers, and NAG activity can be stimulated by N input [51].…”

Section: Enzyme Activitiesmentioning

confidence: 57%

Litter Decomposition Is Not Affected by Perfluorobutane Sulfonate (PFBS) in Experimental Soil Microcosms

Zhang

Rillig

2023

Soil Systems

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Perfluorobutane sulfonate (PFBS) has been found in increasing concentrations in the environment. However, its effect on litter decomposition in soils is still unclear. Therefore, the effect of PFBS on the decomposition of various litter types was tested, as well as on selected aspects of soil quality. Soil samples were treated with different concentrations of PFBS (0, 1, and 10 µg g–1) and five organic litter materials were used with various C:N ratios. A soil microcosm experiment was performed at 20 °C for 6 weeks. Litter decomposition, soil respiration, enzyme activities, soil pH, water-stable aggregates (WSA), and soil total C and N contents were measured. PFBS treatments were observed to have negligible effects on litter decomposition as well as on other soil properties. This means that in the concentration range examined, this substance has no observable effects on the key soil parameters examined. The present result was inconsistent with the findings of a previous study with similar experimental microcosms but different soils. This study suggests that the effects of PFBS may be less pronounced in the tested soil, but it cannot be concluded that PFBS is harmless in soil ecosystems. A wider range of soil types and PFBS levels should be tested in future studies.

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Section: Enzyme Activitiesmentioning

confidence: 57%

Litter Decomposition Is Not Affected by Perfluorobutane Sulfonate (PFBS) in Experimental Soil Microcosms

Zhang

Rillig

2023

Soil Systems

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“…Specifically, 1 H ,1 H ,2 H ,2 H -perflurooctyl acrylate (PFOA, with six fluorocarbons in the side chain) and 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA, with three fluorocarbons in the side chain) were chosen based on the evidence that the degradation products of their fluorocarbon side chains have minimal bioaccumulation in the liver of rats compared to that of perfluorooctanesulfonic acid . While recent evidence hinted that PFOA could cause accumulation in serum, HFBA ( n = 3) has demonstrated low bioaccumulation potential and low toxicity in past reports . PFAS with n = 3 have been shown to lead to undetectable cytotoxicity when tested on human mesenchymal stem cells for over 7 days of incubation and to cause the lowest level of bioaccumulation (among a selection of six fluorinated compounds) in the serum of rats over 10 days .…”

Section: Introductionmentioning

confidence: 99%

“…43 While recent evidence hinted that PFOA could cause accumulation in serum, 43 HFBA (n = 3) has demonstrated low bioaccumulation potential and low toxicity in past reports. 44 PFAS with n = 3 have been shown to lead to undetectable cytotoxicity when tested on human mesenchymal stem cells for over 7 days of incubation 45 and to cause the lowest level of bioaccumulation (among a selection of six fluorinated compounds) in the serum of rats over 10 days. 43 The cumulative amount was merely onethird that of substances with seven fluorocarbons and thus deemed safer for long-term applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Amphiphilic Copolymer Thin Films with Short Fluoroalkyl Side Chains for Antibiofilm Properties at the Solid–Liquid–Air Interface

Khlyustova

Kirsch

Yang

2022

ACS Sustainable Chem. Eng.

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Biofouling is a critical problem that limits numerous technologies including water desalination and marine transportation. The existing solutions, such as copper-based paint to mitigate ship hull fouling, are known to harm aquatic species. Although hydrophilic and zwitterionic materials have demonstrated great promise in resisting the formation of biofilms, they demonstrated limited effectiveness at the solid−liquid−air interface, the location most prone to biofilm formation by motile bacteria. While an amphiphilic copolymer comprising a statistical mixture of zwitterionic and fluorinated units exhibited excellent antifouling performance at the triple interface, the long-fluorinated side chain raises concerns regarding bioaccumulation. Here, two amphiphilic copolymers, each made of a pyridinium-based zwitterionic and hydrophobic repeat units with a short fluorinated chain (1H,1H,2H,2H-perflurooctyl and 2,2,3,4,4,4-hexafluorobutyl groups), were synthesized using initiated chemical vapor deposition. Fineman−Ross analysis demonstrated the formation of random copolymers with a preference for 4-vinylpyridine incorporation. The antibiofilm performance remained good for both hydrophobic chains: amphiphilic copolymers outperformed pure zwitterionic chemistry by 43.8 and 39.3%, as demonstrated usingPseudomonas aeruginosathat forms biofilms at the triple interface. The amphiphilic coatings reported here can be used to prevent biofilm formation at the triple interface in marine transportation, food manufacturing, and medical devices, while avoiding the environmental concerns related to perfluoroalkyl substances.

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PFOA and PFOS induces mineralization of soil organic carbon by accelerating the consumption of dissolved organic carbon

Li,

Lv,

Chen

et al. 2024

Carbon Res.

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The wide spread of Perfluoroalkyl substances (e.g., PFOA and PFOS) in soil can alter native soil geochemical properties and microbial communities through various approaches. Nonetheless, it is unclear that how PFOA and PFOS in soil affect the mineralization of soil organic carbon (SOC). A laboratory-scale culture experiment (180 d) was performed to explore the contribution of PFOA and PFOS to SOC dynamics and soil geochemical processes. Results showed that positive priming effect (PE) occurred in the short term (i.e., 30 days after PFOA and PFOS addition) and subsequently shifted to a slightly negative PE (i.e., 90 days) and remained in a significant negative PE thereafter (i.e., > 180 days). The PEs caused by PFOA and PFOS both accelerated the consumption of dissolved organic carbon (DOC), resulting in a significant increase in SOC mineralization (10.45%–127.36%) under the short-term incubation (30 d). As for long-term exposure (> 90 d), the organic carbon mineralization rate was significantly reduced (58.30%–65.24%) due to the excessive DOC consumption in the initial stage. High throughput analysis indicated that both PFOA and PFOS changed soil bacterial and fungal community structures, altered the relevant metabolic pathways and resulted in the enrichment of specific taxa. Graphical Abstract

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Effects of perfluoroalkyl substances on soil respiration and enzymatic activity: differences in carbon chain-length dependence

Cited by 7 publications

References 26 publications

Litter Decomposition Is Not Affected by Perfluorobutane Sulfonate (PFBS) in Experimental Soil Microcosms

Litter Decomposition Is Not Affected by Perfluorobutane Sulfonate (PFBS) in Experimental Soil Microcosms

Amphiphilic Copolymer Thin Films with Short Fluoroalkyl Side Chains for Antibiofilm Properties at the Solid–Liquid–Air Interface

PFOA and PFOS induces mineralization of soil organic carbon by accelerating the consumption of dissolved organic carbon

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