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 22 for “"urban soils"”.
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COMPOST QUALITY RECOMMENDATIONS FOR REMEDIATING URBAN SOILS
Poor soil health is a critical problem in many urban landscapes. Degraded soil restricts plant growth and microorganism activity, limiting the ability of urban landscapes to perform much needed ecosystem services. Amending soil with compost can increase infiltration, microbial biomass, cation …
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Drought Resistance Response of Tall Fescue Established in Disturbed Urban Soils Utilizing Biosolids
Urban soils are typically degraded due to land disturbance. The poor quality physical and chemical properties of the soil can benefit from application of organic amendments. Local sources of such amendments are biosolids, which are treated domestic wastewater sludges. The objective of this …
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An investigation of the distribution, fractionation and bioaccessibility of potentially toxic elements in urban soils of Lagos, Nigeria
… potentially toxic elements (PTE) in the city's soils is of concern, and requires investigation, because of possible effects on human health.Soil samples were collected from different land-use types and socioeconomic areas in Lagos state in February and August of 2014 and returned to Scotland, …
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Phytoextraction of Lead from Contaminated Urban Soils by Panicum virgatum Enhanced with Phytohormone, EDTA, Benomyl, and Citric Acid Application
… for phytoextraction of Pb from contaminated urban soils in Atlanta, GA. EDTA is often regarded as the most effective chelate, but has potential problems associated with its use due to long persistence time in soil and possible Pb mobilization into groundwater. Citric acid has been proposed as …
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Investigation of how oral bioaccessibility of potentially toxic elements in urban soils is affected by contaminant source and sampling techniques
Potentially Toxic Elements (PTEs) in urban soils often originate from both geogenic and anthropogenic sources. Understanding their mobility, distribution, and geochemical interactions provides the necessary evidence to effectively assess the risks posed to people from exposure to soil …
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Analogue enrichment of aromatic degradation through application of lignin-derived phenols
… aromatic hydrocarbons (PAHs) in PAH-contaminated urban soils using naturally occurring lignin-derived phenols (13C-vanillin substrates). The influence of vanillin substrates on the 13C-signatures as identified on the 16S rRNA gene profiles present in the bacterial population were explored using …
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Carbon in urban, brownfield and heavy metal contaminated soils
… thesis is comprised of a collection of work on urban, brownfield and heavy metal contaminated soils carried out within the North West of England from March 2007 to December 2009. Field and laboratory based experiments were used to determine the amount of carbon stored in urban soils and fluxes …
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Development of Soil Survey Methods for Urban Areas
<p>Urban soils are the foundation of urban ecosystems and play a vital role in long-term urban sustainability and resiliency. Accurate soil surveys of urban areas should be done at higher resolution since extensive human activities often result in urban soil being highly disturbed and spatially …
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Disentangling Perceived and Measured Soil Health in New York City Urban Farms
… addressed by constructing new compost-based soils for urban agriculture. We examined these constructed soils to assess soil health across a diversity of farming sites across New York City, consulting with farmers to characterize their soils as “healthy” or “unhealthy” based on agricultural …
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ASSESSING THE IMPACTS OF ORGANIC AMENDMENTS ON DISTURBED SOIL PROPERTIES, WATER QUALITY AND VEGETATION GROWTH
… matter (OM) are exhibited in disturbed roadside soils rendering them less favorable for plant growth. Vegetation plays a crucial role in maintaining the health of ecosystems, providing a myriad of benefits in protecting against soil erosion and effectively managing stormwater. National and state …
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Mapping and mitigating soil total lead contamination in Chicago, Illinois
Urban soils can harbor elevated concentrations of trace metal elements, in particular, lead (Pb), that present potentially severe risks to human health. Urbanized regions such as Chicago, in the north-central U.S., harbor soil total Pb that exceeds geogenic concentrations, often by orders of …
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Trace Metal Concentrations across Trophic Levels in Cotton Fields of Xinjiang Province, China
<p>Trace metals become concentrated in urban and peri-urban soils with the use of agricultural practices and industrial emissions. Fertilizers, liming, sewage sludge, and irrigation water contain metals which accumulate in agricultural fields and pose a risk to humans and wildlife. Coal plants and …
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The role of reliability in characterizing green stormwater infrastructure in urban areas
… to expand, the issues of flood control and urban water quality have risen to the forefront of modern sustainability challenges. Green infrastructure— the use of nature-based solutions to target, treat, and store stormwater at its source— has emerged as a possible solution. While green …
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Earthworms in the Urban Environment: Can Population Augmentation Improve Urban Soil Properties?
Urban forests perform essential ecological functions, and their performance is dependent on soil quality, which is often degraded by human activity. Because earthworms play a key role in soil health, augmenting earthworm populations in urban soils may improve tree performance. However, we know very …
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Compost Application Practices for Revegetating Disturbed Soils
Urban development alters the physical and chemical properties of soil which presents challenges for vegetation establishment. Compost, when applied as a soil amendment, can help to ameliorate these challenges. In field trials, we evaluated the effect of surface-applied composts and standard …
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Biosolids as a source of soil conditioning and fertility for turfgrass
… to increase recycling rates to land, especially urban areas. Other methods of improving the environmental impact of wastewater treatment includes additions of iron (Fe) to reduce phosphorus (P) concentrations in outgoing treated water and precipitate the P into the biosolids. Proper management of …
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A study of potentially toxic elements in the Forth and Clyde Canal, Scotland, UK
… of Fe was relatively constant, but an urban/rural divide was evident in the concentrations of the other analytes, indicting significant anthropogenic input, most likely due to runoff of contaminated urban soils. High levels of analytes at particular locations could often be attributed …
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The Influence of Urban Soil Rehabilitation on Soil Carbon Dynamics, Greenhouse Gas Emission, and Stormwater Mitigation
Global urbanization has resulted in rapidly increased urban land. Soils are the foundation that supports plant growth and human activities in urban areas. Furthermore, urban soils have potential to provide a carbon sink to mitigate greenhouse gas emission and climate change. However, typical urban …
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Development of Urban Tree Growth Models Based on Site and Soil Characteristics
Trees provide numerous benefits crucial to urban environments, yet poor growing conditions often prevent trees from reaching their genetic potential for growth, longevity, and ecosystem function. To overcome these limitations, greater understanding of tree growth in the urban environment is needed. …
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