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The influence of drill cuttings on physical characteristics of phytodetritus

The influence of drill cuttings on physical characteristics of phytodetritus
The influence of drill cuttings on physical characteristics of phytodetritus
Sinking of aggregated phytoplankton cells is a crucial mechanism for transporting carbon to the seafloor and benthic ecosystem, with such aggregates often scavenging particulate material from the water column as they sink. In the vicinity of drilling rigs used by the oil and gas industry, the concentration of particulate matter in the water column may at times be enriched as a result of the discharge of ‘drill cuttings’ – drilling waste material. This investigation exposed laboratory produced phytoplankton aggregates to drill cuttings of various composition (those containing no hydrocarbons from reservoir rocks and those with a <1% hydrocarbon content) and assessed the change in aggregate size, settling rate and resuspension behavior of these using resuspension chambers and settling cylinders. Results indicate that both settling velocity and seabed stress required to resuspend the aggregates are greater in aggregates exposed to drill cuttings, with these increases most significant in aggregates exposed to hydrocarbon containing drill cuttings.
Drill cuttings, Phytoplankton aggregates, Oil and gas industry, Settling speed, Critical shear velocity, Carbon transport
0025-326X
2170-2180
Pabortsava, Katsiaryna
bb9c573c-918c-4bc5-ad41-f85e47a6a580
Purser, Autun
3d26da46-6049-4180-8bff-af6a2ec02ba7
Wagner, Hannes
1a0e080f-e940-40d2-9faa-38444694b155
Thomsen, Laurenz
38e101c9-b6ef-4b0c-a101-7683df681f9c
Pabortsava, Katsiaryna
bb9c573c-918c-4bc5-ad41-f85e47a6a580
Purser, Autun
3d26da46-6049-4180-8bff-af6a2ec02ba7
Wagner, Hannes
1a0e080f-e940-40d2-9faa-38444694b155
Thomsen, Laurenz
38e101c9-b6ef-4b0c-a101-7683df681f9c

Pabortsava, Katsiaryna, Purser, Autun, Wagner, Hannes and Thomsen, Laurenz (2011) The influence of drill cuttings on physical characteristics of phytodetritus. Marine Pollution Bulletin, 62 (10), 2170-2180. (doi:10.1016/j.marpolbul.2011.07.002).

Record type: Article

Abstract

Sinking of aggregated phytoplankton cells is a crucial mechanism for transporting carbon to the seafloor and benthic ecosystem, with such aggregates often scavenging particulate material from the water column as they sink. In the vicinity of drilling rigs used by the oil and gas industry, the concentration of particulate matter in the water column may at times be enriched as a result of the discharge of ‘drill cuttings’ – drilling waste material. This investigation exposed laboratory produced phytoplankton aggregates to drill cuttings of various composition (those containing no hydrocarbons from reservoir rocks and those with a <1% hydrocarbon content) and assessed the change in aggregate size, settling rate and resuspension behavior of these using resuspension chambers and settling cylinders. Results indicate that both settling velocity and seabed stress required to resuspend the aggregates are greater in aggregates exposed to drill cuttings, with these increases most significant in aggregates exposed to hydrocarbon containing drill cuttings.

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More information

Published date: 2011
Keywords: Drill cuttings, Phytoplankton aggregates, Oil and gas industry, Settling speed, Critical shear velocity, Carbon transport
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 204341
URI: https://eprints.soton.ac.uk/id/eprint/204341
ISSN: 0025-326X
PURE UUID: c4479dc5-54a8-4c72-bf14-84b9691dc874

Catalogue record

Date deposited: 25 Nov 2011 10:00
Last modified: 16 Jul 2019 23:17

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