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 73 for “"Contaminated soils"”.
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Innovative technologies of phytoremediation for contaminated soils
… many techniques available for the remediation of contaminated soils, that to date represent a constantly evolving field, absorbing a lot of resources for research and development. Phytoremediation is a technique that uses plants to clean up metals and other contaminants from the soil or to make …
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Remediation of chromium contaminated soils with colloidal silica
… suitable for injection to stabilize fine-grained soils. It is also applied as a stabilizer in the in-situ treatment of hazardous waste. Once the colloidal silica solution is injected into contaminated soil, it moves through the pores inside the soil matrix, initiating the stabilization process. …
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Carbon in urban, brownfield and heavy metal contaminated soils
… 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 of dissolved organic carbon and …
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TNT-contaminated soils remediation for volunteer Army ammunitions plant
… investigated for TNT (nitroaromatic explosive) contaminated soils remediation. The technologies are phytoremediation and thermal incineration. Phytoremediation is an in-site wetlands-type remediation which uses plants. Thermal incineration (mobile) treatment achieves complete destruction of the …
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Methodologies for the analysis of petroleum hydrocarbons extracted from contaminated soils
… many thousands of analyses of TPH and BTEX on contaminated soils annually research into and assessment of current methods is required to demonsfrate the effects on outcomes of method choice. In the Australian context the problem of developing standard methods for the analysis of hydrocarbon …
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Feasibility study to extract iron and chromium from chromium contaminated soils
Chromium contaminated soils, besides being recognized for toxic and hazardous hexavalent chromium, contain high iron concentrations. At some sites, concentrations of iron oxide are higher than 30%. Both iron and chromium in soils have recyclable value provided they can be either concentrated in the …
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Immobilization of Heavy Metals in Contaminated Soils and Sludge Using Organoclay
… irreversible immobilization of heavy metals in contaminated soils. The adsorbent was prepared by pillaring montmorillonite with silica followed by the grafting of a chelate ligand onto its surface. Its structure was studied by the Brunauer, Emmett, and Teller Method adsorption of N2, Dynamic …
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Use of electrokinetic and reactive barriers to treat heavy metals-contaminated soils
… for the remediation of low permeability contaminated soils by chromium and arsenic was investigated. The combination of EK with RB is a possible way in order to enhance EK removal of Cr and As that are reported to be among the more difficult elements to remove by electrokinetics. The goal …
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Soil washing and post-wash biological treatment of petroleum hydrocarbon contaminated soils
… to investigate the treatability of petroleum contaminated soils by soil washing and subsequent biological treatment of the different soil fractions. In addition to soils obtained from contaminated sites, studies were also performed on soils contaminated in the laboratory. Soil washing was …
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Monitoring phytoremediation of petroleum hydrocarbon contaminated soils in a closed and controlled environment
… removing organic and inorganic pollutants from soils. Much research has focused on this type of remediation in the past few years due to its potential as an efficient and cost effective technology.The purpose of this project was to extensively monitor phytoremediation of diesel-contaminated …
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Rapid identification of oil contaminated soils using visible near infrared diffuse reflectance spectroscopy
Initially, 46 petroleum contaminated and non-contaminated soil samples were collected and scanned using visible near-infrared diffuse reflectance spectroscopy (VisNIR DRS) at three combinations of moisture content and pretreatment. The VisNIR spectra of soil samples were used to predict total …
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Investigation of the supercritical fluid extraction and detection of metals in contaminated soils
… (SFE) and detection of sorbed metals in contaminated soils is explored. Iron containing samples were spiked onto sea sand and extracted with Supercritical Fluid CO₂. On-line detection was accomplished by decompressing the SF-CO₂ and analyte into a microwave induced plasma, whereby the …
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Bioaugmentation with metal-resistance microorganisms in the remediation of metal and organic contaminated soils
Current thinking is that co-contaminated sites (i.e., sites with both organic and metallic pollutants) are difficult to bioremediate because the metal toxicity is such that organic degradation is inhibited. The objective of this research was to evaluate the potential of bioaugmentation with …
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Impacts of microbial activity on trace metal behavior during the bioremediation of phenanthrene-contaminated soils
A novel method for the bioremediation of phenanthrene using the fungus Penicillium frequentans was utilised to remove phenanthrene (200 mg kg\(^{-1}\)) from soil containing both metals and phenanthrene, over 29 days. Bioremediation of phenanthrene and its effects on trace metal behaviour has been …
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Bioremediation of modelled petroleum-contaminated soils of the Niger Delta and the impact of zeolite augmentation
The bioremediation of modelled petroleum oil-contaminated soils of the Niger Delta by a mixed culture of three hydrocarbon-degrading bacteria, Acinetobacter sp, Rhodococcus sp and Pseudomonas sp, was investigated. These bacterial strains were selected based on criteria that they were able to …
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Use of solvents for PAHs extraction and enhancement of the PAHs bioremediation in coal-tar-contaminated soils
<p>Bioremediation of coal-tar-contaminated soils is a challenging task because of the low solubility of the polycyclic aromatic hydrocarbons (PAHs) and their high partitioning with soils. As such, not all the PAHs present in the soil will be available for biodegradation. Enhancing the availability …
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Adaptability, Biomass Yield, and Phytoremediation of Arundo donax L. on marginal lands: salt, dry and lead-contaminated soils
… problem of the soil salinity. The pollution of soils due to accumulation of heavy metals is a global problem that may involve the loss of agricultural areas: contaminated land is no longer suited to farming, and may be especially harmful to the entire ecosystem (Alloway, 1995). Plants tolerant …
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Sorption of lead and arsenic on soil components and effectiveness of phosphates for remediating lead and arsenic contaminated soils
… as an in situ remediation technique for Pb contaminated soils. Lead sequestered in apatite minerals has great durability and leaching resistance, significantly exceeding other chemically stabilized forms. Sequential extractions of Pb have been used to determine the suitability of phosphates …
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Investigating adsorption characteristics of Delonix regia for heavy metals removal in wastewater and its potential for remediating contaminated soils
… and Co from polluted water and stabilization of contaminated soils. The focus also included assessment of available metal concentrations, pool size and kinetic resupply using Diffusive Gradient in Thin film (DGT) technique and DGT- Induced Fluxes in Sediments (DIFS) model. Batch adsorption …
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