Effects Of Amendment Materials On Cement Solidified Contaminated Marine Sediments Mechanical Stability And Leaching Of Heavy Metals PDF Download
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Author | : M. Kvennås |
Publisher | : |
Total Pages | : 18 |
Release | : 2009 |
Genre | : Consolidation |
ISBN | : |
Download Effects of Amendment Materials on Cement-Solidified Contaminated Marine Sediments--Mechanical Stability and Leaching of Heavy Metals Book in PDF, ePub and Kindle
Stabilization/solidification technology (S/S), in which contaminated marine sediments are mixed with cement and other binding agents have shown to be a promising remediation technique. The major advantage of S/S over other contaminated sediments remediation techniques is that dredged material can be transformed from a soft material into a filling material with favorable geotechnical properties. Reduced contaminant transport from the treated material is achieved simultaneously. This paper summarizes a study investigating how amendments (additions) may improve the mechanical properties and reduce leaching of heavy metals of two cement-stabilized marine harbor sediments from the cities of Bergen and Hammer-fest, Norway. The deployed amendments comprised granulated blast furnace slag (Merit®), cement kiln dust, fly ash, gypsum, sand, iron sulfide, and microsilica. The use of amendments was observed to improve the strength of cement-stabilized soft and wet sediments, where the use of granulated blast furnace slag (Merit) resulted in the greatest inprovement. Cement stabilization resulted in a reduced leaching of lead, whereas the leaching of copper and chromium from Hammerfest sediments increased substantially. In order to achieve the lowest total net transport of contaminants through the material, S/S recipes for environmental projects should not only be optimized with regard to physical strength, but also with regard to leaching and permeability.
Author | : |
Publisher | : |
Total Pages | : 110 |
Release | : 1999 |
Genre | : Hazardous wastes |
ISBN | : |
Download Stabilization of Heavy Metals in Portland Cement, Silica Fume/portland Cement and Masonry Cement Matrices Book in PDF, ePub and Kindle
Author | : Masaharu Fukue |
Publisher | : ASTM International |
Total Pages | : 388 |
Release | : 2006 |
Genre | : Contaminated sediments |
ISBN | : 0803134088 |
Download Contaminated Sediments Book in PDF, ePub and Kindle
Author | : JI. Bhatty |
Publisher | : |
Total Pages | : 16 |
Release | : 1996 |
Genre | : Cement |
ISBN | : |
Download Stabilization of Heavy Metals in Portland Cement Matrix Book in PDF, ePub and Kindle
Effects of heavy metals on the physical and chemical properties of cement pastes were studied using different types of cement, four metal oxides and four soluble metal salts. Type I (high aluminate content) and Type V (low aluminate content) cements were used to study the effects of their chemical differences on paste properties and metal stabilization. Fresh pastes were tested for workability, initial setting times, and heats of hydration. Hardened pastes were tested for strength and leachability by both TCLP and column leaching with acetic acid.
Author | : |
Publisher | : |
Total Pages | : 394 |
Release | : 1993 |
Genre | : Pollution |
ISBN | : |
Download Pollution Abstracts Book in PDF, ePub and Kindle
Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Author | : 馬依琪 |
Publisher | : Open Dissertation Press |
Total Pages | : |
Release | : 2017-01-27 |
Genre | : |
ISBN | : 9781361414330 |
Download Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments Book in PDF, ePub and Kindle
This dissertation, "Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments" by 馬依琪, Yee-ki, Ma, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3122768 Subjects: Contaminated sediments - China - Hong Kong Heavy metals - Environmental aspects - China - Hong Kong
Author | : Wayne S. Adaska |
Publisher | : |
Total Pages | : 28 |
Release | : 1991 |
Genre | : Technology & Engineering |
ISBN | : |
Download Solidification and Stabilization of Wastes Using Portland Cement Book in PDF, ePub and Kindle
Author | : TE. Myers |
Publisher | : |
Total Pages | : 16 |
Release | : 1992 |
Genre | : Dredging spoil |
ISBN | : |
Download Laboratory Evaluation of Stabilization/Solidification Technology for Reducing the Mobility of Heavy Metals in New Bedford Harbor Superfund Site Sediment Book in PDF, ePub and Kindle
Sediment samples from the New Bedford Harbor Superfund Site, New Bedford, MA, were stabilized/solidified using the following binders: portland cement, Portland cement with a proprietary additive, and a proprietary binder system. Comparison of contaminant masses released during sequential batch leaching of stabilized/solidified sediment and untreated sediment showed that stabilization/solidification reduced the leachability of some but not all metals investigated. The amounts of metal leached from stabilized/solidified sediment relative to the mass leached from untreated sediment were reduced by factors of 10 to 37, 1.2 to 2.6, 4.3 to 28, and 9.0 to 14 for cadmium, chromium, lead, and zinc, respectively. Copper and nickel, however, were mobilized by stabilization/solidification. The amounts of copper and nickel leached from stabilized/solidified sediment relative to the mass leached from untreated sediment were increased by factors of 20 to 23 and 9.6 to 17 for copper and nickel, respectively. Desorption isotherm analysis of sequential batch leach data showed that solidification/stabilization processing of this sediment altered the mechanisms controlling metal leaching.
Author | : M. J. Board |
Publisher | : |
Total Pages | : 41 |
Release | : 2000 |
Genre | : Hazardous wastes |
ISBN | : |
Download The Effects of Age on Cement Stabilised/solidified Contaminated Materials Book in PDF, ePub and Kindle
Author | : K. Brodersen |
Publisher | : |
Total Pages | : 18 |
Release | : 1992 |
Genre | : Additives |
ISBN | : |
Download Cement Conditioning of Waste Materials and Polluted Soil Using the GEODUR Process Book in PDF, ePub and Kindle
In this work, two areas of application of the GEODUR additive in cement stabilization of waste materials have been investigated: stabilization of radioactive contaminated soil and stabilization of municipal solid waste incinerator ash. Preliminary experimental work on a clayey soil contaminated with radioactive cesium and strontium has indicated that the GEODUR process is a technically feasible method for soil solidification. The retarding effects of humic materials in the soil are eliminated by the additive even at low cement contents. The solidified soil is not particularly strong, but has satisfactory water permeability. Retention of cesium is reasonably good, but not as good as for the untreated soil. Retention of strontium is not good but is considerably improved by carbonation. The volume stability during permanent immersion of the solidified products in water is satisfactory, but crack formation during dryout cannot be excluded.