Fate of weathered multi-walled carbon nanotubes in an aquatic sediment system

Politowski, Irina; Regnery, Philipp; Hennig, Michael; Siebers, Nina; Ottermanns, Richard

doi:10.1016/j.chemosphere.2021.130319

Cited by 9 publications

(9 citation statements)

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“…These groups are found in wastewater at concentrations between 3.69 and 32.66 ng/L, whereas a range of 0.001 and 0.8 ng/L has been detected in surface waters (Maurer-Jones et al 2013), but environmental concentrations of nanomaterials in general are widely unknown (Lawrence et al 2016). Due to agglomeration and sedimentation, over time, CNTs deposit in water and therefore cause higher concentrations in sludge and sediment (Chen et al 2010;Schierz et al 2014;Glomstad et al 2018;Gottschalk et al 2009;Sun et al 2014;Politowski et al 2021a). For this, reported CNT concentrations in sediment compartments range between 1 µg/kg and 1 mg/kg (Selck et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Such biofilms consist of taxa from many different phyla including bacteria, algae (e.g., diatoms), fungi, ciliates, cyanobacteria, rotifers, and nematodes (Kohušová et al 2011). For single species, numerous publications on the effects of CNTs on these organisms exist, but effects on interactions or the transfer of CNTs within the food web have been less investigated (Politowski et al 2021a). Organisms depending on biofilm as food source occur among the functional feeding group of grazers.…”

Section: Introductionmentioning

confidence: 99%

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A workflow to investigate the impacts of weathered multi-walled carbon nanotubes to the mud snail Lymnaea stagnalis

Weise

Kurth

Politowski

et al. 2021

Environ Sci Pollut Res

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Although the development and application of nanomaterials is a growing industry, little data is available on the ecotoxicological effects on aquatic organisms. Therefore, we set up a workflow to address the potential uptake of weathered multi-walled carbon nanotubes (wMWCNTs) by a model organism, the pulmonary mud snail Lymnaea stagnalis (L. stagnalis), which plays an important role in the food web. It represents a suitable organism for this approach because as a grazer it potentially ingests large amounts of sedimented wMWCNTs. As food source for L. stagnalis, benthic biofilm was investigated by the use of a transmission electron microscope (TEM) and a scanning electron microscope (SEM) after exposure with wMWCNTs. In addition, isotopic labeling was applied with 14C-wMWCNTs (0.1 mg/L) to quantify fate, behavior, and enrichment of 14C-wMWCNTs in benthic biofilm and in L. stagnalis. Enrichment in benthic biofilm amounted to 529.0 µg wMWCNTs/g dry weight and in L. stagnalis to 79.6 µg wMWCNTs/g dry weight. A bioconcentration factor (BCF) for L. stagnalis was calculated (3500 L/kg). We demonstrate the accumulation of wMWCNTs (10 mg/L) in the digestive tract of L. stagnalis in an effect study. Moreover, the physiological markers glycogen and triglycerides as indicators for the physiological state, as well as the RNA/DNA ratio as growth indicator, were examined. No significant differences between exposed and control animals were analyzed for glycogen and triglycerides after 24 days of exposure, but a decreasing trend is recognizable for triglycerides. In contrast, the significant reduction in the RNA/DNA ratio of L. stagnalis indicated an inhibition of growth with a following recovery after depuration. The described workflow enables a comprehensive determination of the fate and the behavior of wMWCNTs specifically and in general all kinds of CNTs in the aquatic environment and therefore contributes to a holistic risk assessment of wMWCNTs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A workflow to investigate the impacts of weathered multi-walled carbon nanotubes to the mud snail Lymnaea stagnalis

Weise

Kurth

Politowski

et al. 2021

Environ Sci Pollut Res

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“…A detailed description and characterization of MWCNTs can be found in Politowski et al ( 40 , 41 ) and Weise et al ( 27 ). Agglomerates with their typical cross-link structure and single strands of MWCNTs displaying a spiral shape with some irregularities were identified ( Fig.…”

Section: Methodsmentioning

confidence: 99%

Multiwalled Carbon Nanotubes Promote Bacterial Conjugative Plasmid Transfer

et al. 2022

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“…These groups are found in wastewater at concentrations between 3.69 -32.66 ng/L, whereas a range of 0.001 -0.8 ng/L has been detected in surface waters (Maurer-Jones et al 2013) but environmental concentrations of nanomaterials in general are widely unknown (Lawrence et al 2016). Due to agglomeration and sedimentation, over time, CNTs deposit in water and therefore cause higher concentrations in sludge and sediment (Chen et al 2010;Schierz et al 2014;Glomstad et al 2018; Gottschalk et al 2009;Sun et al 2014;Politowski et al 2021a). For this, reported CNT concentrations in sediment compartments range between 1 µg/kg and 1 mg/kg (Selck et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Such bio lms consist of taxa from many different phyla including bacteria, algae (e.g., diatoms), fungi, ciliates, cyanobacteria, rotifers, and nematodes (Kohušová et al 2011). For single species, numerous publications on the effects of CNTs on these organisms exist, but effects on interactions or the transfer of CNTs within the food web have been less investigated (Politowski et al 2021a). Organisms depending on bio lm as food source belong, e.g., to the functional feeding group of grazers.…”

Section: Introductionmentioning

confidence: 99%

A Workflow to Investigate the Impacts of Weathered Multi-Walled Carbon Nanotubes to the Mudsnail Lymnaea Stagnalis

Weise

Kurth

Politowski

et al. 2021

Preprint

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Although the development and application of nanomaterials is a growing industry, little data is available on the ecotoxicological effects on aquatic organisms. Therefore, we set up a workflow to address the potential uptake of weathered multi-walled carbon nanotubes (wMWCNTs) by a model organism, the pulmonary mudsnail Lymnaea stagnalis (L. stagnalis), which plays an important role in the food web. It represents a suitable organism for this approach because as a grazer it potentially ingests large amounts of sedimented wMWCNTs. As food source for L. stagnalis, benthic biofilm was investigated by the use of a transmission electron microscope (TEM), and a scanning electron microscope (SEM) after exposure with wMWCNTs. In addition, isotopic labeling was applied with 14C-wMWCNTs (0.1 mg/L) to quantify fate, behavior and enrichment of 14C-wMWCNTs in benthic biofilm and in L. stagnalis. Enrichment in benthic biofilm amounted to 529.0 µg wMWCNTs/g dry weight and in L. stagnalis to 79.6 µg wMWCNTs/g dry weight. A bioconcentration factor (BCF) for L. stagnalis was calculated (3,500 L/kg). We demonstrate the accumulation of wMWCNTs (10 mg/L) in the digestive tract of L. stagnalis in an effect study. Moreover, the physiological markers glycogen and triglycerides as indicators for the physiological state, as well as the RNA/DNA ratio as growth indicator were examined. No significant differences between exposed and control animals were analyzed for glycogen and triglycerides after 24 d of exposure, but a decreasing trend is recognizable for triglycerides. In contrast, the significant reduction in the RNA/DNA ratio of L. stagnalis indicated an inhibition of growth with a following recovery after depuration. The described workflow enables a comprehensive determination of the fate and the behavior of wMWCNTs in specifically and in general all kinds of CNT in the aquatic environment and therefore contributes to a holistic risk assessment of wMWCNTs.

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Fate of weathered multi-walled carbon nanotubes in an aquatic sediment system

Cited by 9 publications

References 50 publications

A workflow to investigate the impacts of weathered multi-walled carbon nanotubes to the mud snail Lymnaea stagnalis

A workflow to investigate the impacts of weathered multi-walled carbon nanotubes to the mud snail Lymnaea stagnalis

Multiwalled Carbon Nanotubes Promote Bacterial Conjugative Plasmid Transfer

A Workflow to Investigate the Impacts of Weathered Multi-Walled Carbon Nanotubes to the Mudsnail Lymnaea Stagnalis

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