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Sunday, May 17, 2020 | History

2 edition of Soil column desorption studies on a chromium contaminated soil found in the catalog.

Soil column desorption studies on a chromium contaminated soil

Bruce L. Ball

Soil column desorption studies on a chromium contaminated soil

by Bruce L. Ball

  • 379 Want to read
  • 34 Currently reading

Published .
Written in English

    Subjects:
  • Chromium -- Environmental aspects -- Oregon -- Corvallis.,
  • Soil pollution -- Oregon -- Corvallis.,
  • Chromium -- Absorption and adsorption.,
  • Soil absorption and adsorption -- Oregon -- Corvallis.

  • Edition Notes

    Statementby Bruce L. Ball.
    The Physical Object
    Pagination84 leaves, bound :
    Number of Pages84
    ID Numbers
    Open LibraryOL15182936M

    Desorption of heavy metals from contaminated soil Sci. Agric. (Piracicaba, Braz.), v, n.3, p, May/June able chelates has been thus proposed to enhance the metal soil availability and accumulation in plants while avoiding leaching risks (Nascimento et al., ). This paper evaluates the ability of six chelate. To develope a practicable stabilization method for remediation chromium contaminated soil, reductant and chelate reagent were investigated for stabilization artificical chromium contaminated soil, and the stabilization effect was tested through extraction toxicity assay after stablized soil was oxidized at pH The experimental results showed that the composition of sodium bisulfite & Author: Ji Da Chen, Li Liu, Li Wei Zhang, Shi Guo Liao, Yong Ting Song, Na Zhang.

    Thermal Desorption. Description. Thermal desorption separates contaminants from soil. Soil is heated in a chamber in which water, organic contaminants and certain metals are vaporized.A gas or vacuum system transports vaporized water and contaminants to an off-gas (i.e., air emission) treatment system. The design of a system aims to volatize contaminants, while attempting not to oxidize them. reference soil dose derived from studies that use soluble aqueous metal species. The metal-sequestering of soil may significantly lower bioavailability of Cr, which in turn may influence the decision for remediation at contaminated sites. Thus, action levels set by state regulators concerning the bioavailability of Cr in soil may need to considerCited by: 2.

    The objective of this study was to investigate the heavy metal sorption and leaching characteristics of an artificial soil formed by blendi ng industrial and municipal by-products and implemented as a beneficial waste reuse and la nd reclamation strategy. These volumes contain the proceedings of the Fifth FZK/TNO Conference on Contaminated Soil. The themes discussed are as follows: 1. National and International Programmes. 2. Site Investigation. 3. Emission and Fate of Contaminants. 4. Characterization of Contaminated Soil. 5. Effects and Risks.


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Key words

Key words

Soil column desorption studies on a chromium contaminated soil by Bruce L. Ball Download PDF EPUB FB2

Batch reactor experiments are used to determine equilibrium sorption parameters for chromate and sorbing co-solutes on soil, and to study sorption and desorption kinetics over extended time periods (weeks to months) that are relevant to soil contamination sites.

Soil column studies are used to more closely simulate field conditions of porous. @article{osti_, title = {Fate of chromium in soil}, author = {Prokisch, J and Gyori, Z and Kovacs, B and Loch, J}, abstractNote = {The chromium cycle in soil was studied with speciation of chromium.

The aim was to look for the possibilities the mobilization of chromium(III) and to measure the rate of chromate reduction in nature and pot and field experiments in Hungarian soils. The amount of mercury adsorbed on a soil column (Q) shows a very poor correlation with soil clay content (r2 = ), indicating that Hg sorption in these topsoil samples is chiefly governed by.

Thermal desorption of fluorene, anthracene, pyrene, and benzo(a)pyrene in soil contaminated with PAHs was performed using a rotary desorber at temperatures of – °C, and the dependency of.

Several thermal desorption experiments have been performed in this study. In a typical run, nearly 10 g d.w. of Soil column desorption studies on a chromium contaminated soil book were loaded in the reactor.

Desorption treatments of soil A included heating (according to a linear schedule, 3 or 5 "Clmin) from room temperature to the desired final temperature (T,), ranging. Chromium levels in soil vary according to area and the degree of contamination from anthropogenic chromium sources.

Tests on soils have shown chromium concentrations ranging from 1 to mg/kg, with an average concentration ranging from 14 to about 70 mg/kg (4). Chromium(VI) in soil can be rapidly reduced to chromium(III) by organic matter.

Adsorption of Chromium on dye contaminated soil has been studied using batch adsorption technique. This study is carried out to examine adsorption capacity of Chromium on contaminated soil.

The influence of contact time, pH, variation of amount of soil, initial Cr Concentration, and particle size also : Priya Vijayvergiya, Shweta Saxena.

The contaminated soil was prepared for the desorption test. 5 g of pulverized soil were first put into a mL centrifuge tube. To reach the target contamination levels of Cr(III), Mn(II), and Ni(II) (i.e., 1 mg/g, 5 mg/g, and10 mg/g), a certain dose of Cr(III), Mn(II), and Ni(II) solutions and DIW were injected into the tube to reach a volume Cited by: Knowledge of sorption and desorption of heavy metals by individual soil components should be useful for modelling the behaviour of soils of arbitrary composition when contaminated by heavy metals, and for designing amendments increasing the fixation of heavy metals by soils polluted by these by: RC Hexavalent Chromium Sorption and Desorption in Natural Soils and Subsoils RC Biotransformation of Ordnance Wastes Using Unique Consortia of Anaerobic Bacteria RC The Effect of Environmental Conditions on Reductive Dechlorination Rates RC Lead Sorption, Transport, and Remediation in Natural Soils and Subsoils.

Leaching of chromium from chromium contaminated soil – adsorption/desorption reactions.5 Due of these differences in chemistry, Soil sampling, properties and soil column set up Two soil types were used in this study: i) grass-covered and well-drained urban green. groundwater resources.

However, if the bioavailability is a key factor for remediating Cr(VI) contaminated soil, as in phytoremediation, increased availability of Cr(VI) for plant uptake in calcareous soil will enhance its removal. Key Words: Hexavalent chromium, calcareous soil, sorption, desorption, solute transport, heavy metal.

Soil leaching is an effective remediation technique using agents to leach the target pollutants from the soil. However, the dynamics and mechanisms for leaching of Cr and other non-pollutant metals from Cr-contaminated soils are not yet well understood. Here, column leaching experiments were conducted to determine the effect of hydrochloric acid (HCl), citric acid (CA), and oxalic acid (OX) on Cited by: 3.

Low-temperature thermal desorption, in which thermal energy is used to vaporize and physically separate volatile and semivolatile organic contaminants from soil, is among the most promising and economic ex situ soil remediation alternatives.

Experiments were performed using a bench-scale thermal desorber, the batch thermal reactor, which was developed as a prototype to commercial desorbers. composition on chromium desorption in soils contaminated by tannery waste.

Australian Journal of Soil Resea Banks M, Schwab A, Henderson C () Leaching and reduction of chromium in soil as affected by soil organic content and plants. Chemosph   In soil and roadways, these particles might have been eroded by wind and foot traffic and carried as chromium-laden dust into homes and workplaces.

Children playing in areas where the slag was used as fill might also have been exposed through skin contact with chromium-contaminated dust, dirt, and puddles and /or ingestion of contaminated soil.

Experimental design. At the beginning of our experiment, the column apparatus for infiltration was designed. It was compiled from a glass cylinder with specific proportions (see Figure 1).Standard soil matrix was placed in such a way that it reached average height, which corresponds to topsoil height and also height used for infiltration in-situ experiments (Hirzel & Matus, ; Johnson, Cited by: 1.

CHAPTER 2 SORPTION AND AGEING OF SOIL CONTAMINATION 19 CHAPTER 2 SORPTION AND AGEING OF SOIL CONTAMINATION Loibner A., Jensen J., Ter Laak T., Celis R. and Hartnik T. In the field it is a common phenomenon to observe a relatively rapid initial decrease of organic contaminants followed by a subsequent slow disappearance of the residu-al Size: KB.

Chromium Chromium in Soil and Plants. Chromium is a naturally occurring element in rocks and soil. Natural soil typically contains between 10 and 50 mg of chromium for every kg of soil.

Chromium can exist in its elemental form (chromium 0) as well as chromium III and chromium VI ‑ the Roman numerals denote the valency. EPA /R/ October IN SITU TREATMENT OF SOIL AND GROUNDWATER CONTAMINATED WITH CHROMIUM TECHNICAL RESOURCE GUIDE Center for Environmental Research Information National Risk Management Research Laboratory Office of Research and Development U.S.

Environmental Protection Agency Cincinnati, Ohio. Abstract. The comparative effectiveness for hexavalent chromium reduction and removal from irrigation water, using three selected plant species (Phragmites australis, Salix viminalis, and Ailanthus altissima) planted in soil contaminated with hexavalent chromium, has been studied in the present above plant species were irrigated, in a continuous mode, with water, contaminated Cited by: Desorption compost DOC (dissolved organic carbon) organic contaminants PAH (polycyclic aromatic hydrocarbon) soil soil contamination This is a preview of subscription content, log in to check by: 2.there is neither sorption nor desorption of P) and standard P requirement (SFR P sorbed at solution P concentration of mg Pit) were obtained by plotting sorbed P versus solution P.

The amount of P sorbed, X (mg/ g) from one addition of g P/kg of soil was also determined after shaking for 24 hours at a water to soil ratio of