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You searched for subject:(Peat oxidation). Showing records 1 – 3 of 3 total matches.

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University of Waterloo

1. Osman, Fares. Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada.

Degree: 2018, University of Waterloo

In peatlands, increased sulfate (SO42-) availability can stimulate dissimilatory SO42- reduction (DSR), allowing it to become a prominent anaerobic carbon (C) mineralization process. In turn, methane emissions may be suppressed, but at the expense of potentially degrading peat accumulation processes if DSR dominates C mineralization pathways. Additionally, as a product of DSR, sulfide sequesters potentially toxic metals as insoluble precipitates. However, accumulation of dissolved sulfide may be toxic to wetland vegetation species. Peatlands are abundant in the Western Boreal Plain in Alberta, the majority of which are fens. Due to the nature of surface mining in the Athabasca Oil Sands Region (AOSR), these systems are removed from the landscape. Accordingly, oil sands companies are required to return their post-mined sites to equivalent pre-disturbed conditions. In an attempt to test the feasibility of fen creation in the AOSR, a fen peatland ecosystem, named Nikanotee Fen, has been constructed with water supply from an adjacent tailings sand upland aquifer and surrounding reclaimed hillslopes. In the fen peat deposit, pore water SO42- concentrations are 1 to 2 orders of magnitude higher than in surrounding natural peatlands. Due to the nature of the materials used in the design of the system, and the management practices employed prior to construction, the sources that contribute to the elevated pool of SO42- are not well understood. The purpose of this research was to investigate the main sources of SO42- and identify hydrogeochemical controls on its dissolved pool in the pore waters of Nikanotee Fen. Throughout the study period (2013-2016), pore water SO42- concentrations were generally highest in the upland tailings sand aquifer, primarily derived from legacy gypsum (CaSO4·2H2O) in process affected water, in addition to the marine origin of the sand which was reflected by Ca:SO4 molar ratios less than 1 in the groundwater, especially in the eastern region. In the petroleum coke underdrain that was incorporated to control groundwater transport from the upland aquifer, pore water SO42- concentrations increased over time. Dilution, due to freshwater inputs from precipitation and surface runoff generated by the reclaimed hillslopes, was the main mechanism controlling the dissolved SO42- pool in the upland aquifer and petroleum coke underdrain. Additionally, the heterogeneity of the placed tailings sand likely contributed to the variability in pore water SO42- distribution between the eastern and western regions of the upland. Unexpectedly, the peat deposit in 2013 initially experienced substantially higher pore water SO42- concentrations than the underlying petroleum coke underdrain in the western region of the fen, indicating a pre-existing source of SO42- in the peat, possibly due to the prolonged drainage of the donor fen. However, lower average pore water SO42- concentrations than in the underlying petroleum coke underdrain, Ca:SO4 molar ratios exceeding 1, and elevated HCO3- concentrations in the eastern…

Subjects/Keywords: Sulfur; Oil sands; Hydrogeochemistry; Sulfate reduction; OSPW; Gypsum; Wetland reclamation; Cation exchange; Peatland drainage; Tailings sand; Nikanotee Fen; Biogeochemistry; Peat; Athabasca Oil Sands Region; Peat oxidation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Osman, F. (2018). Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Osman, Fares. “Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada.” 2018. Thesis, University of Waterloo. Accessed November 15, 2019. http://hdl.handle.net/10012/13286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Osman, Fares. “Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada.” 2018. Web. 15 Nov 2019.

Vancouver:

Osman F. Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2019 Nov 15]. Available from: http://hdl.handle.net/10012/13286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Osman F. Sulfur biogeochemistry in a constructed fen peatland in the Athabasca Oil Sands Region, Alberta, Canada. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. SHAILENDRA MISHRA. MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS.

Degree: 2014, National University of Singapore

Subjects/Keywords: Peat oxidation; Metagenomics; Metabolic profiles; Rewetting of peat; Mixed crop plantations; Greenhouse gas emissions

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

MISHRA, S. (2014). MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/119551

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

MISHRA, SHAILENDRA. “MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS.” 2014. Thesis, National University of Singapore. Accessed November 15, 2019. http://scholarbank.nus.edu.sg/handle/10635/119551.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

MISHRA, SHAILENDRA. “MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS.” 2014. Web. 15 Nov 2019.

Vancouver:

MISHRA S. MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS. [Internet] [Thesis]. National University of Singapore; 2014. [cited 2019 Nov 15]. Available from: http://scholarbank.nus.edu.sg/handle/10635/119551.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

MISHRA S. MICROBIAL PROCESSES AND THEIR RELATIONSHIPS WITH ENVIRONMENTAL TRAITS IN DEGRADED TROPICAL PEATLANDS. [Thesis]. National University of Singapore; 2014. Available from: http://scholarbank.nus.edu.sg/handle/10635/119551

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Humboldt University of Berlin

3. Junghans, Veikko. Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern).

Degree: 2012, Humboldt University of Berlin

Meliorationen der letzten Jahrhunderte führten zu erheblichen Veränderungen der Moorböden, wie z.B. starke Degradierungen und Moorschwund. Anhand der Moorlandschaft der Lewitz im südwestlichen Mecklenburg-Vorpommern wird gezeigt, inwieweit historische Bewirtschaftungen und kultureller Wandel aktuelle Eigenschaften der Moorkörper beeinflussen. Außerdem wurde eine Bewertung des Standortes hinsichtlich seiner Mineralisierungsrate, der C-Speicherung und des C-Freisetzungspotentials vorgenommen. Floristische Standortuntersuchungen runden das Bild ab. Der Moorschwund betrug durchschnittlich 2,9 dm von 1974 bis 2011. An zwei Standorten verringerte sich gleichzeitig der Anteil der mineralischen Komponenten in den oberen Bodenschichten. Begründet wird dies mit der unsicheren Wiederfindung der alten Standorte und der am Standort durchgeführten Bodenbearbeitung in Folge von Umbruch und durch Baumaßnahmen.Vorheriger Moorschwund wird auf Sackungsprozesse infolge von intendierten Grundwasserabsenkungen zurückgeführt. Die derzeit gespeicherte Kohlenstoffmenge im Polder Schwarzer Graben II beträgt bei einer durchschnittlichen Moormächtigkeit von 6 dm etwa 678 t C ha-1. Zwischen 1974 und 2011 wurden 134 t C ha-1 freigesetzt. Dies entspricht einer Emissionsrate von etwa 3,6 t C ha-1 a-1. Ein historischer Exkurs beleuchtet kurz sowohl die Entstehung der Lewitz als geografische Landschaft als auch den agrarkulturellen Wandel der letzten 300 Jahre.

Last centuries’ meliorations caused tremendous changes of peat-soils, like peat degradations and peat loss. By an example in the landscape of the Lewitz in the south-western part of Mecklenburg-Western Pomerania it is shown, how actual properties of peat-soils are influenced by historical land-use and cultural change. Beside that the site is validated according its mineralisation rate, C-storage and C-release potential. Floristic observation provide additional information. An average loss in peat thickness of 2,9 dm between 1974 and 2011 could be stated. At two specific sites digging stated a decrease of mineralic components in the upper layer in the same period. One background for this is seen in the uncertainty in finding the exact former digging sites, whereas other reasons are physical changes due to agricultural and constructional activities in former times. Former peat loss is mainly caused by compaction processes due to artificial lowering of groundwater tables. The actual average carbon storage of the Polder Schwarzer Graben II area is 678 t C ha-1 with an average peat thickness of 6 dm. Between 1974 and 2011 a carbon amount of 134 t C ha-1 was released. This equals an emission rate of approximately 3,6 t C ha-1 a-1. An historical excursion describes in short the formation of the Lewitz as a geographical landscape and the agro-cultural change of the last 300 years.

Advisors/Committee Members: Zeitz, Jutta, Riesbeck, Frank.

Subjects/Keywords: Natürliche Ressourcen, Energie, Umwelt; Mecklenburg-Vorpommern; Landschaft; Oxidation; oxidation; fen; land use change; Grünland; Moor; Wandel; Moorschutz; Versumpfungsmoor; Sackung; C-Speicherung; C-Freisetzung; Lewitz; Melioration; Landschaftsgeschichte; Geographie; groundwater fen; mire protection; wetland protection; compaction; peat soils; carbon storage; carbon release; Lewitz; landscape; pasture; meadow; melioration; Mecklenburg-Western Pomerania; landscape history; geography; ddc:333.7

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Junghans, V. (2012). Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern). (Masters Thesis). Humboldt University of Berlin. Retrieved from http://edoc.hu-berlin.de/docviews/abstract.php?id=42447 ; http://edoc.hu-berlin.de/master/junghans-veikko-2012-07-12/PDF/junghans.pdf ; http://www.nbn-resolving.de/urn:nbn:de:kobv:11-100236322

Chicago Manual of Style (16th Edition):

Junghans, Veikko. “Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern).” 2012. Masters Thesis, Humboldt University of Berlin. Accessed November 15, 2019. http://edoc.hu-berlin.de/docviews/abstract.php?id=42447 ; http://edoc.hu-berlin.de/master/junghans-veikko-2012-07-12/PDF/junghans.pdf ; http://www.nbn-resolving.de/urn:nbn:de:kobv:11-100236322.

MLA Handbook (7th Edition):

Junghans, Veikko. “Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern).” 2012. Web. 15 Nov 2019.

Vancouver:

Junghans V. Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern). [Internet] [Masters thesis]. Humboldt University of Berlin; 2012. [cited 2019 Nov 15]. Available from: http://edoc.hu-berlin.de/docviews/abstract.php?id=42447 ; http://edoc.hu-berlin.de/master/junghans-veikko-2012-07-12/PDF/junghans.pdf ; http://www.nbn-resolving.de/urn:nbn:de:kobv:11-100236322.

Council of Science Editors:

Junghans V. Veränderungen von Böden und der C-Speicherung in einem flachgründigen Versumpfungsmoor am Beispiel der Lewitz (Mecklenburg-Vorpommern). [Masters Thesis]. Humboldt University of Berlin; 2012. Available from: http://edoc.hu-berlin.de/docviews/abstract.php?id=42447 ; http://edoc.hu-berlin.de/master/junghans-veikko-2012-07-12/PDF/junghans.pdf ; http://www.nbn-resolving.de/urn:nbn:de:kobv:11-100236322

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