An investigation into the long-term binding and uptake of PFOS, PFOA and PFHxS in soil – plant systems

Knight, Emma R.; Bräunig, Jennifer; Janik, L.; Navarro, Divina A.; Kookana, Rai S.; Mueller, Jochen F.; McLaughlin, Michael J.

doi:10.1016/j.jhazmat.2020.124065

Cited by 33 publications

(13 citation statements)

References 31 publications

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“…Ca and Mg were playing an indispensable role in the regulation of osmotic pressure, the maintenance of metabolic balance, and the synthesis of substances in plants. (Knight et al 2020) At the low concentration of the PFASs (5 mg/L), the content of Ca and Mg in the plant was relatively reduced. The reduction of Ca and Mg elements was not conducive to alleviating the stress and toxicity of PFASs, and might lead to increased absorption and accumulation of PFASs.…”

Section: Regulations Of Cat Sod Pod H 2 O 2 Mda and Soluble Sugarmentioning

confidence: 95%

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Effect of Nicotiana benthamiana exposed to long- or short-chain perfluoroalkyl substances: Levels, transfer and potential risk analysis

Liu

et al. 2021

Preprint

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Background: Perfluoroalkyl substances (PFAS) can endanger human health through the food chain. However, the physiological mechanisms of crops exposed to PFAS are still unclear. Objectives: The physiology, phytotoxicity and accumulation of Solanaceae model crops Nicotiana benthamiana exposed to perfluorooctanoic acid (PFOA), hexafluoropropylene oxide-dimer acid (HFPO-DA) and their mixed contaminants have been studied. Results: (i) Biomass, relative electrical conductivity and catalase all decrease; (ii) Chlorophyll, peroxidase, hydrogen peroxide and malondialdehyde all increase; (iii) Superoxide dismutase and soluble sugar both increase and then decrease; (Ⅳ) The absorption and transport of K, Ca, Mg and Na are affected, particularly shoots; (V) PFOA has the highest toxicity and bioaccumulation. Conclusion: PFAS will damages the economic benefits of crops and people's health. So, its production and uses should be curtailed except for essential uses. Future direction: Substitute substances may be more harmful, so grouping strategies and evaluation framework should be established as soon as possible.

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Section: Regulations Of Cat Sod Pod H 2 O 2 Mda and Soluble Sugarmentioning

confidence: 95%

“…Ca and Mg were playing an indispensable role in the regulation of osmotic pressure, the maintenance of metabolic balance, and the synthesis of substances in plants (Knight et al 2020…”

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confidence: 99%

Effect of Nicotiana benthamiana exposed to long- or short-chain perfluoroalkyl substances: Levels, transfer and potential risk analysis

Liu

et al. 2021

Preprint

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“…In addition, advanced textile properties such as repellency to liquids or a water column currently require chemicals that are considered of high concern, like fluorochemicals that dominate the water-and oil-repellent textile finishing market because of their excellent performance. However, fluorinated chemicals release harmful substances, giving rise to serious damage to ecosystems worldwide [1,2]. This is not a sustainable situation, and therefore a transition to a less harmful and b solution is necessary [3].…”

Section: Introductionmentioning

confidence: 99%

Biobased Waterborne Polyurethane-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic Textile Coatings

Lacruz

Salvador²,

Blanco

et al. 2021

Polymers

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Waterborne polyurethane-urea dispersions (WPUD), which are based on fully biobased amorphous polyester polyol and isophorone diisocyanate (IPDI), have been successfully synthesized obtaining a finishing agent that provides textiles with an enhanced hydrophobicity and water column. Grafting of trans-cyclohexanediol isobutyl POSS (POSS-OH) to the biobased polymer backbone has also been investigated for the first time and its properties compared to a standard chain extender, 1,3-propanediol (PDO). The chemical structure of WPUD has been characterized by Fourier-transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The thermal properties have been evaluated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Mechanical properties have been studied by tensile stress–strain analysis. Moreover, the particle size, particle size distribution (PSD), and stability of developed waterborne dispersions have been assessed by dynamic light scattering (DLS), Z-potential, storage aging tests, and accelerated aging tests by analytical centrifuge (LUM). Subsequently, selected fabrics have been face-coated by the WPUD using the knife coating method and their properties have been assessed by measuring the water contact angle (WCA), oil contact angle (OCA), water column, fabric stiffness, air permeability, and water vapor resistance (breathability). Finally, the surface morphology and elemental composition of uncoated and coated fabrics have been studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. All of the synthesized polyurethane-ureas provided the coated substrates with a remarkable hydrophobicity and water column, resulting in a more sustainable alternative to waterproof coatings based on fluoropolymers, such as PTFE. Grafting POSS-OH to the polymeric backbone has led to textile coatings with enhanced hydrophobicity, maintaining thermal, mechanical, and water column properties, giving rise to multifunctional coatings that are highly demanded in protective workwear and technical textiles.

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“…28,29 On-site trace PFAS analysis in soil is challenging, due to the large degree of organic matter and clay content. 30 Additionally, the existence of a large number of PFAS isomers complicates their analysis and requires an advanced analytical technique, such as LC/MS. 31 To date, LC/MS has proven to be the most effective technique for PFAS analysis, as it minimizes the thermal degradation of various thermolabile PFASs and requires minimal sample preparation steps, unlike GC−MS.…”

mentioning

confidence: 99%

“…These substances have been classified as highly hazardous, owing to their potentially toxic and carcinogenic nature and limited biodegradability. , Moreover, their detection within almost every environmental media, including water, biota, and soil, has caused considerable concern. , Contaminated soil acts as one of the long-term reservoirs of PFASs and hence leads to their prolonged exposure through leaching, agriculture, and other human activities . Accordingly, several environmental-monitoring agencies have recently established strict limitations around PFAS contamination in soil (usually less than 0.01 mg/kg), which necessitates their regular analysis and record keeping. , On-site trace PFAS analysis in soil is challenging, due to the large degree of organic matter and clay content . Additionally, the existence of a large number of PFAS isomers complicates their analysis and requires an advanced analytical technique, such as LC/MS .…”

mentioning

confidence: 99%

Small-Footprint, Field-Deployable LC/MS System for On-Site Analysis of Per- and Polyfluoroalkyl Substances in Soil

et al. 2021

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Per-and polyfluoroalkyl substances (PFASs) are emerging environmental pollutants of global concern. For rapid field site evaluation, there are very few sensitive, field-deployable analytical techniques. In this work, a portable lightweight capillary liquid chromatography (capLC) system was coupled with a small footprint portable mass spectrometer and configured for fieldbased applications. Further, an at-site ultrasound-assisted extraction (pUAE) methodology was developed and applied with a portable capLC/mass spectrometry (MS) system for on-site analysis of PFASs in real soil samples. The influential variables on the integration of capLC with MS and on the resolution and signal intensity of the capLC/MS setup were investigated. The important parameters affecting the efficiency of the pUAE method were also studied and optimized using the response surface methodology based on a central composite design. The mean recovery for 11 PFASs ranged between 70 and 110%, with relative standard deviations ranging from 3 to 12%. In-field method sensitivity for 12 PFASs ranged from 0.6 to 0.1 ng/g, with wide dynamic ranges (1−600 ng/g) and excellent linearities (R 2 > 0.991). The in-field portable system was benchmarked against a commercial lab-based LC−tandem MS (MS/MS) system for the analysis of PFASs in real soil samples, with the results showing good agreement. When deployed to a field site, 12 PFASs were detected and identified in real soil samples at concentrations ranging from 8.1 ng/g (for perfluorooctanesulfonic acid) to 2935.0 ng/g (perfluorohexanesulfonic acid).

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An investigation into the long-term binding and uptake of PFOS, PFOA and PFHxS in soil – plant systems

Cited by 33 publications

References 31 publications

Effect of Nicotiana benthamiana exposed to long- or short-chain perfluoroalkyl substances: Levels, transfer and potential risk analysis

Effect of Nicotiana benthamiana exposed to long- or short-chain perfluoroalkyl substances: Levels, transfer and potential risk analysis

Biobased Waterborne Polyurethane-Ureas Modified with POSS-OH for Fluorine-Free Hydrophobic Textile Coatings

Small-Footprint, Field-Deployable LC/MS System for On-Site Analysis of Per- and Polyfluoroalkyl Substances in Soil

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