Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 190 for “"Dissolved organic carbon"”.
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Dissolved organic carbon and colour dynamics in drained and restored blanket peat
Peatlands are important terrestrial stores of carbon and a principal source of dissolved organic carbon (DOC) to the fluvial environment. Whilst often regarded as a net carbon sink, enhanced DOC concentrations and an associated rise in the level of water discolouration observed in many artificially …
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Salt retention in wetland soils and effects on dissolved organic carbon export
… spots for many nutrients including carbon. The interactions between deicing salt runoff and wetland soil carbon were explored by measuring chloride export and retention, dissolved organic carbon (DOC) export, and carbon quality using mesocosm experiments. Net retention of Cl- was …
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Removal of dissolved organic carbon and organic halide precursors by enhanced coagulation
… of enhanced coagulation at removal of dissolved organic carbon (DOC) and organic halide precursors. Bench-scale treatment included: 1) baseline treatment, defined as the coagulant dose and pH at which the specific utility's water treatment plant was operating on the day the samples were …
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Import and decomposition of dissolved organic carbon in pre-dams of drinking water reservoirs
Dissolved organic carbon (DOC) depicts a key component in the aquatic carbon cycle as well as for drinking water production from surface waters. DOC concentrations increased in water bodies of the northern hemisphere in the last decades, posing ecological consequences and water quality problems. …
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Lability of dissolved organic carbon in Arctic rivers on the North Slope of Alaska
Rivers are an important pathway of organic carbon-mobilization in the arctic, and their influence is projected to grow as precipitation and soil temperatures increase in response to highlatitude warming. This study addresses the bioactivity of arctic riverine dissolved organic carbon (DOC) in three …
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Tree species effects on the release of dissolved organic carbon and nitrogen from decomposing logs
Besides carbon dioxide emissions, the leaching of dissolved organic carbon (DOC) and nitrogen (DON) is the most important process contributing to the mass loss of coarse woody debris (CWD comprising all dead woody material with at least >7 cm in diameter). Increased DOC and nitrogen (N) inputs into …
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GLOBAL ASSESSMENT OF RADIOCARBON ISOTOPIC ANALYSIS FOR PARTICULATE AND DISSOLVED ORGANIC CARBON IN RIVERINE SYSTEMS
… are a significant source of particulate and dissolved organic carbon (POC, DOC) into inland waters and coastal systems and provide a fundamental linkage between the terrestrial, oceanic, and atmospheric carbon reservoirs. Recent studies have examined the relationship between the quantity and …
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The marine biogeochemistry of dissolved organic carbon and dissolved organic nutrients in the Atlantic Ocean
The marine biogeochemistry of dissolved organic carbon (DOC) has come under<br/>increased scrutiny because of its involvement in the global carbon cycle and<br/>consequently climate change. Dissolved organic nitrogen (DON) and phosphorus<br/>(DOP), which have historically been ignored because of …
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A palaeolimnological study of the anthropogenic impact on dissolved organic carbon in South Swedish lakes
… three decades, increases have been observed in dissolved organic carbon (DOC) concentrations and colour in the surface waters of lakes and rivers in parts of Europe and North America, raising concern about the effects on the quality of aquatic environments with consequences for biodiversity, …
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The Biogeochemical Cycling of Dissolved Organic Carbon in the Iberian Margin Upwelling System (NE Atlantic Ocean
Dissolved organic carbon (DOC) is the quantitatively most important organic carbon reservoir in the world's oceans and its determination at ocean margins, where the exchange of terrestrial and oceanic organic matter occurs, is important for estimating cross-slope fluxes to deep waters. With the …
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Monsoonal affected dynamics of nitrate and dissolved organic carbon in a mountainous catchment under intensive land-use
… Amongst other substances, nitrate and dissolved organic carbon (DOC) play a critical role in the ecosystem health of water bodies. The major focus of this dissertation is on determining the nitrate and DOC mobilization processes and dynamics in the Haean Catchment, a mountainous …
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ELEMENTAL COMPOSITION AND NUTRIENT EFFECT ON THE UPTAKE AND METABOLISM OF DISSOLVED ORGANIC CARBON BY BACTERIA FROM A TEMPERATE REGION RIVER
… and reactor for allochthonous and autochthonous organic carbon sources (OC) delivered to the coastal ocean. In comparison to marine waters, inland waters quantitatively represent only a fraction of the marine system; however, their importance to global C cycling maybe disproportional to its …
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Impact of bromide ion concentration, time, dissolved organic carbon and molecular weight cutoff on haloacetonitrile, haloketone, chloropicrin and trihalomethane formation potentials
This research investigated the formation potential (FP) for haloacetonitriles (HANSs), haloketones (HKs), chloropicrin (CP) and trihalomethanes (THMs) under conditions of constant DOC, constant Cl:DOC ratio, variable [Br] and variable apparent molecular weight (AMW) for coagulated water from a …
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Profiling of Microbial Communities, Antibiotic Resistance, Functional Genes, and Biodegradable Dissolved Organic Carbon in a Carbon-Based Potable Water Reuse System
… aspects of the operation of a microbially-active carbon-based advanced treatment train producing water intended for potable reuse are examined, including fate of dissolved organic carbon, underlying microbial populations, and functional genes are explored. Further, dynamics associated with …
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Carbon metabolism and dissolved organic carbon (DOC) fluxes on seagrass communities: insights from plant colonization states, eutrophication and global change related factors
… ecosystems on Earth. Their role in the global carbon cycle and how they cope with global change may be more relevant than previously believed. They export large quantities of matter, both in particulate and dissolved forms to adjacent communities. Dissolved organic carbon (DOC) flux play a …
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Abundance, Standing Stock Biomass and species Composition of Zooplankton in Lake Sakakawea, ND and Uptake of Dissolved Organic Carbon (DOC) by Daphnia pulex
… of the system, but temporal differences existed. Dissolved organic carbon increased from a mean of 3.3 ppm on June 16 to 4.5 ppm on July 8 and remained above 4.0 ppm through September 18. To determine if Daphnia pulex utilize DOC as a potential food source, live adult D. pulex were exposed to four …
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The effect of pH and dissolved organic carbon on the growth kinetics of Ac. cupricumulans JTC3 and L. ferriphilum HT pertinent to the BIOX® process
… such as pH and temperature, and the presence of dissolved organic carbon on the growth and ferrous iron oxidation kinetics of these two microorganisms were investigated as potential driving forces behind the compositional shift in the BIOX® consortia. Biokinetic performance of L. ferriphilum …
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