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Contaminated soils are cleansed to remove a wide range of contaminants through the use of the most advanced treatment technologies including physico-chemical and bioremediation techniques. Clean material is recovered and recycled and pollutants analysed and disposed of safely.
Clean Earth provides various treatment options for non-hazardous and hazardous soil contamination. The combination of our various technologies, locations. 11 THE TREATMENT OF CONTAMINATED SOILS Chapter contents
The washing of soil with water to remove contaminants and recover sand, gravel and soil forming materials. The soil washing plant removes heavy metals from contaminated soils, silts and sludges through a physicochemical treatment process. Bulk soils are separated into coarse aggregates, sand and silt size fractions and then washed to remove surface contamination. Mixing cement with waste that cannot be recovered to bind the contaminants by adding fly ash, cement and water to certain waste materials, a chemical reaction occurs that binds heavy metals.
The resulting granular product is less likely to produce leachate than the original waste material and is suitable for disposal in landfill.
Changes in TPH composition The total removal rates of various TPH composition including saturated hydrocarbon, aromatic hydrocarbon, asphaltene, and polar compound are depicted in Fig. Fourier transform infrared spectroscopy confirmed the presence of oil in the plant tissues. Ecommerce Solutions by PureNet. Differences among treatments were analyzed by one-way analysis of variance least significant difference test. Find articles by Rajendrasinh N. Figure 1 describes a variation in plant biomass among plant species in the study. Ecology of Combined Pollution.
Composting of soil to remove organic contaminants and recover the soil in a controlled environment, specific bacteria are added to soils contaminated with organic compounds hydrocarbons. The degradation of petroleum type materials is promoted through the circulation of air and by controlling the levels of moisture. England and Wales This may be attributed to the difference in properties of rhizosphere secretion by sowing different plant species.
The plants had a certain effect on special rhizosphere secretions i.
Changed pH value for plant species tested in control and rhizosphere soil at 30 days following transformation. The infrared IR spectra of the ornamental plants in noncontaminated soil as well as those planted in oil-contaminated soil Fig. The results clearly showed that the IR spectra of plants sown in contaminated soil and that of noncontaminated soil were showing different absorption patterns in the IR region.
Many of these bands shift toward the higher or lower frequency, clearly indicating the impact of oil contamination. This study has shown that phytoremediation using special ornamental species is one of the treatment methods in terms of effectiveness of TPH degradation in petroleum-contaminated soil. National Center for Biotechnology Information , U.
Find articles by Rui Liu. Find articles by Rajendrasinh N. Find articles by Qixing Zhou.
Find articles by Zhe Liu. Received Dec 27; Accepted Jun Copyright , Mary Ann Liebert, Inc. Abstract Pot-culture experiments were carried out to assess the phytoremediation potential of 14 ornamental plants in weathered petroleum-contaminated soil, which was collected in the Shengli Oil Field, one of the biggest oil fields in China, by examining their impact on the degradation potential of total petroleum hydrocarbons TPHs and its composition.
Introduction W ith rapid development of industry, automobiles, and airplanes, the demand for petroleum is increasingly expanded. Experimental design The tested plants and their basic botanical characteristics are summarized in Table 1. A herbaceous perennial plant growing 0. The leaves are spirally arranged and broadly lanceolate. It has lance-shaped leaves near the base and several erect, naked stems holding the flowers. Evergreen, creeping perennial grass; deeply rooted specimen grass.
Evergreen, tuft-forming grass; deeply rooted specimen plants. Herbaceous, evergreen, tuft-forming, deeply rooted specimen plants.
Open in a separate window. The removal rate of TPHs was calculated using the following expression: TPH composition and soil pH The determination of saturated hydrocarbon, aromatic hydrocarbon, asphaltene, and polar compound in petroleum-contaminated soil was performed by separation using aluminum oxides. Results and Discussion Growth of plants and their biomass Figure 1 describes a variation in plant biomass among plant species in the study.
Changes in TPH composition The total removal rates of various TPH composition including saturated hydrocarbon, aromatic hydrocarbon, asphaltene, and polar compound are depicted in Fig. Changes in soil pH Figure 4 depicts a change of pH in planted soils after a day culture.
Fourier transform infrared analysis The infrared IR spectra of the ornamental plants in noncontaminated soil as well as those planted in oil-contaminated soil Fig. Author Disclosure Statement No competing financial interests exist.
Evaluation of the use of prairie grasses for stimulating polycyclic aromatic hydrocarbon treatment in soil. Federal Environmental Agency; Bioremediation of oil-contaminated soil: Microbiological methods for feasibility assessment and field evaluation. Rhizosphere microbial characterization in petroleum-contaminated soil. Promoted biodegradation and microbiological effects of petroleum hydrocarbons by Impatiens balsamina L. Risk-based environmental management of petroleum hydrocarbons contaminated soil and development of standards: Phytotoxicity and plant uptake of fuel oil hydrocarbons.
Phytoremediation of soils contaminated with organic pollutants. Feasibility of using forage grassed and legumes for phytoremediation of organic pollutants. Molecular biology, DNA dynamics, and gene transfer. Biological aspects of land rehabilitation following hydrocarbon contamination. Plant-promoted pyrene degradation in soil. The characteristics of bioaccumulation and tolerance mechanism of hyperaccumulator [in Chinese] J. Influence of abuscular mycorrhiza on clover and ryegrass grown together in a soil spiked with polycyclic aromatic hydrocarbons.
Polyphasic microbial community analysis of petroleum-contaminated soils from two northern Canadian communities. Screening of twelve plant species for phytoremediation of petroleum hydrocarbon-contaminated soil. Screening plant species for growth on weathered, petroleum hydrocarbon-contaminated sediments.
Importance of soil water relations in assessing the endpoint of bioremediated soils. Accumulation of phenanthrene and pyrene in rhizophere soil. Characterization of hydrocarbon-degrading microbial populations in contaminated and pristine alpine soils. Assessment of tropical grasses and legumes for phytoremediation of petroleum-contaminated soils.
Water Air Soil Pollut. Studies of the efficacy of alfalfa and reed in the phytoremediation of hydrocarbon-polluted soil. Effect of root death and decay on dissipation of polycyclic aromatic hydrocarbons in the rhizosphere of yellow sweet clover and tall fescue. Phytoremediation of petroleum contaminated soils by Mirabilis jalapa L. Repression of Pseudomonas putida phenanthrene-degrading activity by plant root extracts and exudates. Natural revegetation of hydrocarbon-contaminated soil in semi-arid grasslands. Emergence, survival and growth of selected plant species in petroleum-impacted flare pit soils.
Extraction of petroleum hydrocarbons from soil by mechanical shaking. Biochemical and ecological interactions between plants and bacteria.
Secondary plant metabolites in phytoremediation and biotransformation. Seeds germination and root growth of selected plants in PAH contaminated soil. Phytoremediation of an aged petroleum contaminated soil using endophyte infected and non-infected grasses. Metal accumulation in the polychaete Hediste japonica with emphasis on interaction between heavy metals and petroleum hydrocarbons.
Bacterial rhizosphere populations of black poplar and herbal plants to be used for phytoremediation of diesel fuel, Soil Biol. Oil and Grease Analysis in Wastewater [S] www. Diversity of alkane hydroxylase systems in the environment. Influence of organic and inorganic soil amendments on plant growth in crude oil-contaminated soil.
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Joint chemical flushing of soils contaminated with petroleum hydrocarbons.