... to the low adsorption and high solubility of chromate at high pHs. The results obtained from pH-controlled extraction, x-ray diffraction and scanning electron microscopy suggested that a significant portion of the immobilized heavy metals are strongly associated with pozzolanic reaction products...

... the technology approach for WRAP Module 2A. Screening tests were performed using the major chemical constituent of each waste type to measure the gross compatibility with the immobilization media and to determine formulations for more detailed testing. Surrogate materials representing each of the eight waste...

.... The implications of the experimental results are related to practice. volatilization emissions test procedures solidification stabilization immobilization hazardous waste toxic waste waste treatment treatability studies equipment design H.J. Jennifer Su 1, Richard H. Jensen2, Merten Hinsenveld3...

... Rust Remedial Services, Inc. (RRS) recently conducted a major study on the effectiveness of additives, both virgin and recycled, in the immobilization of low-level organics in soils. Using a clean soil spiked with a mixture of hazardous organic chemicals, twelve different stabilization...

... This study deals with the durability of immobilization matrices, drawing comparisons among the release characteristics of cementitious mortars with or without silica fume, before and after freezing-thawing cycles. Three different dosages of silica fume have been experimented, using silica fume...

... cement. From all these aspects, it is concluded that alkali-slag cements are a better solidification matrix than Portland cement for radioactive wastes. alkali-slag cements immobilization radioactive wastes hydration products leachability pore structure hydrothermal stability chemical attack...

... procedures and for treatability studies is emphasized. Technical guidance is given for assessing the appropriateness of using S/S for any specific wastes. solidification stabilization immobilization hazardous waste toxic waste waste treatment remediation treatability studies Carlton C. Wiles...

... that the necessary mechanical mixing and exothermic cementitious reactions would vaporize the VOCs. The objective of this study was to establish whether S/S is a viable alternative for a sludge heavily contaminated (about 1%) with relatively immobile metals, but lightly contaminated (<0.04%) with VOCs that were...

.../solidification leaching sediment metals immobilization dredged material Tommy E. Myers IandMark E. Zappi I Laboratory Evaluation of Stabilization/ Solidification Technology for Reducing the Mobility of Heavy Metals in New Bedford Harbor Superfund Site Sediment REFERENCE: Myers, T E and Zappl, M E...

... A project to stabilize acidic hydrocarbon sludge lagoons for landfill deposition is described. The sludge will be microencapsulated in a clay matrix, neutralized and cemented with a lime and fly ash pozzolanic mixture. The mechanical improvement and contaminant immobilization provide dimensional...

... immobilization cement-based grouts grout formulation development hazardous radioactive mixed wastes Terry L. Sams t and T. Michael Gilliam 2 Systematic Approach for the Design of Pumpable, Cement-Based Grouts for Immobilization of Hazardous Wastes REFERENCE: Sams, T. L. and Gilliam, T. M., "Systematic...

... Results are presented of a series of experimental tests performed to determine the influence of matrix characteristics on the leaching mechanism of lithium immobilized into cementitious matrices. A dynamic leaching test, using a fixed leachant renewal schedule proposed by the American Nuclear...

... Iodine-129 and carbon-14 are of lesser importance than many other radionuclides in nuclear waste management because of their relatively low radiotoxicity. Their safe immobilization and disposal, however, is a significant challenge because their chemical properties are quite different from most...

... darts immobilization trapping Michael E. R. Godfrey, ^ Robert W. Browne, ^ and Lynn O. Smith? A Review of Some Mule Deer Capture Operations REFERENCE: Godfrey, M. E. R., Browne, R. W., and Smith, L. O., "A ReYiew of Some Mule Deer Capture Operations," Vertebrate Pest Control and Management...

... A metal ion sensor may be prepared by immobilizing a fluorogenic ligand on the common end of a bifurcated fiber optic. Fluorescence is excited through one arm of the fiber optic and observed through the other. When the immobilized ligand is placed in a solution of metal ion, some of the metal...

.... hazardous waste immobilization microencapsulation macroencapsulation cementation adsorption chemsorption passivation diadochy reprecipitation Philip G. Malone^ and Robert J. Larson^ Scientific Basis of Hazardous Waste Immobilization REFERENCE: Malone, P. G. and Larson, R. J., "Scientific Basis...

... and denitrification were proceeding simultaneously and that less than 2 percent of the added labeled nitrogen was immobilized. denitrification nitrification immobilization N transformation eutrophication nitrogen cycle optical emission spectrometry mass spectrometry 15 N tracer streams sediments L...