A novel 3D volumetric method for directly quantifying porosity and pore space morphology in flocculated suspended sediments

Lawrence, T.; Carr, Simon; Manning, Andrew J.; Wheatland, J. A. T.; Bushby, A. J.; Spencer, Kate L.

doi:10.1016/j.mex.2022.101975

Cited by 1 publication

(4 citation statements)

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“…The materials and methods can be divided into several subsections, addressing: the sampling of source sediments; collection and processing of 2D settling data using the LabSFLOC-2 system (Manning, 2006); and collection and processing of 3D floc structure and porosity data using newly established protocols (Lawrence et al, 2022;Lawrence et al, 2023).…”

Section: Methodsmentioning

confidence: 99%

“…After collection, the plankton chamber samples were divided and subjected to the preparation for μCT scanning as detailed in Fitzherbert and Wheatland (2015) producing 3D floc quantification data, outlined in (Lawrence et al, 2022;Lawrence et al, 2023). Data for the four different floc compositions was produced for analysis concerning 3D floc size, porosity, and pore space characteristics (diameter, tortuosity, connectivity).…”

Section: D Structure and Porosity Data Collectionmentioning

confidence: 99%

“…This could be as a result of lower variability in floc shape or structure which are affected by EPS 'stringy-ness', and so could floc shape be a highly influential factor in settling behavior? 3D floc shape analysis is possible using the segmentation and quantification methods introduced in Lawrence et al (2023), so this aspect should be explored in future research.…”

Section: Floc Composition and Settling Velocitymentioning

confidence: 99%

“…spaces (Lawrence et al, 2022;Lawrence et al, 2023). This direct quantification approach overcomes the need to indirectly infer porosity properties in flocs, instead facilitating the direct 3D quantification of floc porosity (Lawrence et al, 2022).…”

mentioning

confidence: 99%

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Functional behaviour of flocs explained by observed 3D structure and porosity

Lawrence,

Carr,

Manning

et al. 2023

Front. Earth Sci.

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Clay-rich flocculated suspended sediments are an important constituent of estuarine and coastal systems globally. They are responsible for the host, movement and deposition of a variety of pollutants, contaminants and sediment itself. Accurate modelling of the movement of these sediments is crucial for a number of industries including fisheries, aquaculture, shipping and waste management. This requires an accurate and reliable measurements of the physical properties of flocs and their behaviour. Porosity is a key element in floc structures, and this research provides updated 3D quantified porosity and pore space morphological data in relation to influences on floc settling behaviour. We report the questionable relationship between floc size and settling velocity, and explore alternative influences such as floc composition, porosity and pore morphology. These outcomes suggest that a shift in focus from floc size to a combination of factors is necessitated to understand the complex movement behaviour of flocculated suspended sediments.

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Section: Methodsmentioning

confidence: 99%

Section: D Structure and Porosity Data Collectionmentioning

confidence: 99%

Section: Floc Composition and Settling Velocitymentioning

confidence: 99%

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confidence: 99%

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