Download or read book Mercury Stabilization in Chemically Bonded Phosphate Ceramics written by and published by . This book was released on 2000 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury stabilization and solidification is a significant challenge for conventional stabilization technologies. This is because of the stringent regulatory limits on leaching of its stabilized products. In a conventional cement stabilization process, Hg is converted at high pH to its hydroxide, which is not a very insoluble compound; hence the preferred route for Hg sulfidation to convert it into insoluble cinnabar (HgS). Unfortunately, efficient formation of this compound is pH-dependent. At a high pH, one obtains a more soluble Hg sulfate, in a very low pH range, insufficient immobilization occurs because of the escape of hydrogen sulfide, while efficient formation of HgS occurs only in a moderately acidic region. Thus, the pH range of 4 to 8 is where stabilization with Chemically Bonded Phosphate Ceramics (CBPC) is carried out. This paper discusses the authors experience on bench-scale stabilization of various US Department of Energy (DOE) waste streams containing Hg in the CBPC process. This process was developed to treat DOE's mixed waste streams. It is a room-temperature-setting process based on an acid-base reaction between magnesium oxide and monopotassium phosphate solution that forms a dense ceramic within hours. For Hg stabilization, addition of a small amount (

Download or read book Evaluation of Chemically Bonded Phosphate Ceramics for Mercury Stabilization of a Mixed Synthetic Waste written by Sandip Chattopadhyay and published by . This book was released on 2003 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemically Bonded Phosphate Ceramics written by Arun S. Wagh and published by Elsevier. This book was released on 2004 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chemically bonded phosphate ceramics (zinc phosphate dental cements) were developed over a century ago. However it has only been in the last 30 years that a new breed of materials has been discovered. This book brings together latest developments in this field including several novel ceramics, from Argonne and Brookhaven National Laboratories. Coupled with further advances in their use as biomaterials, these materials have found uses in diverse fields in recent years. Applications range from advanced structural materials to oil-well cements and stabilization and encapsulation of hazardous and radioactive waste. Such developments call a single source for their science and applications. This book provides the first comprehensive account to fulfil this need. · Providing a foundation into the latest developments in chemically bonded phosphate ceramics. · Explores new CBPC's with a wide range of practical applications. · Over 30 years worth of developments and applications in the field available in a single source

Download or read book Chemically Bonded Phosphate Ceramics written by Arun S. Wagh and published by Elsevier. This book was released on 2004-11-19 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chemically bonded phosphate ceramics (zinc phosphate dental cements) were developed over a century ago. However it has only been in the last 30 years that a new breed of materials has been discovered. Chemically Bonded Phosphate Ceramics brings together latest developments in this field including several novel ceramics, from Argonne and Brookhaven National Laboratories. Coupled with further advances in their use as biomaterials, these materials have found uses in diverse fields in recent years. Applications range from advanced structural materials to oil-well cements and stabilization and encapsulation of hazardous and radioactive waste. Such developments call a single source for their science and applications. This book provides the first comprehensive account to fulfil this need. - Provides a foundation into the latest developments in chemically bonded phosphate ceramics - Explores new CBPC's with a wide range of practical applications - Over 30 years worth of developments and applications in the field available in a single source

Download or read book Chemically Bonded Phosphate Ceramics for Low level Mixed Waste Stabilization written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemically Bonded Phosphate Ceramics for Radioactive and Mixed Waste Solidification and Stabilization written by and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stabilization of Low level Mixed Waste in Chemically Bonded Phosphate Ceramics written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Method of Waste Stabilization Via Chemically Bonded Phosphate Ceramics written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for regulating the reaction temperature of a ceramic formulation process is provided comprising supplying a solution containing a monovalent alkali metal; mixing said solution with an oxide powder to create a binder; contacting said binder with bulk material to form a slurry; and allowing the slurry to cure. A highly crystalline waste form is also provided consisting of a binder containing potassium and waste substrate encapsulated by the binder.

Download or read book Chemically Bonded Phosphate Ceramics for Stabilizing Low level Radioactive Wastes written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemically Bonded Phosphate Ceramics for Radioactive and Mixed Waste Solidification and Stabilization written by and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an initial investigation of low temperature setting chemically bonded magnesium ammonium phosphate (MAP) ceramics as waste form materials, for solidification and stabilization of radioactive and mixed waste, are reported. The suitability of MAP for solidifying and encapsulating waste materials was tested by encapsulating zeolites at loadings up to [approximately]50 wt%. The resulting composites exhibited very good compressive strength characteristics. Microstructure studies show that zeolite grains remain unreacted in the matrix. Potential uses for solidifying and stab wastes are discussed.

Download or read book Tableaux anciens et modernes belles gravures anciennes Objets d Art et d Ameublement armes written by and published by . This book was released on 1934 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Iron phosphate based Chemically Bonded Phosphate Ceramics for Mixed Waste Stabilization written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to develop chemically bonded phosphate ceramics for mixed waste stabilization, a collaborative project to develop iron-phosphate based ceramics has been initiated between Argonne National Laboratory and the V.G. Khlopin Radium Institute in St. Petersburg, Russia. The starter powders are oxides of iron that are generated as inexpensive byproduct materials in the iron and steel industry. They contain iron oxides as a mixture of magnetite (Fe3O4) and haematite (Fe2O3). In this initial phase of this project, both of these compounds were investigated independently. Each was reacted with phosphoric acid solution to form iron phosphate ceramics. In the case of magnetite, the reaction was rapid. Adding ash as the waste component containing hazardous contaminants resulted in a dense and hard ceramic rich in glassy phase. On the other hand, the reaction of phosphoric acid solution with a mixture of haematite and ash waste contaminated with cesium and americium was too slow. Samples had to be molded under pressure. They were cured for 2-3 weeks and then hardened by heating at 350°C for 3 h. The resulting ceramics in both cases were subjected to physical tests for measurement of density, open porosity, compression strength, phase analyses using X-ray diffraction and differential thermal analysis, and leaching tests using toxicity characteristic leaching procedure (TCLP) and ANS 16.1 with 7 days of leaching. Using the preliminary information obtained from these tests, we evaluated these materials for stabilization of Department of Energy's mixed waste streams.

Download or read book Development of Chemically Bonded Phosphate Ceramics for Stabilizing Low level Mixed Wastes written by Seung-Young Jeong and published by . This book was released on 1997 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings and Summary Report written by and published by . This book was released on 2001 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Developments in Strategic Materials and Computational Design III Volume 33 Issue 10 written by Waltraud M. Kriven and published by John Wiley & Sons. This book was released on 2012-11-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring the latest findings, new materials, and applications, this issue keeps readers current with some of the most important developments in strategic materials and the computational design of ceramics and composites. It features select contributions from one symposium and three focused sessions that took place in January 2012 during the 36th International Conference and Exposition on Advanced Ceramics and Composites (ICACC). This issue represents one of nine CESP issues published from the 36th ICACC meeting.

Download or read book Modified Phosphate Ceramics for Stabilization and Solidification of Salt Mixed Wastes written by and published by . This book was released on 1998 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel chemically bonded phosphate ceramics have been investigated for stabilization and solidification of chloride and nitrate salt wastes. Using low-temperature processing, we stabilized and solidified chloride and nitrate surrogate salts (with hazardous metals) in magnesium potassium phosphate ceramics up to waste loadings of 70-80 wt.%. A variety of characterizations, including strength, microstructure, and leaching, were then conducted on the waste forms. Leaching tests show that all heavy metals in the leachant are well below the EPAs universal treatment standard limits. Long-term leaching tests, per ANS 16. 1 procedure, yields leachability index for nitrate ions> 12. Chloride ions are expected to have an even higher (i.e., better) leachability index. Structural performance of these final waste forms, as indicated by compression strength and durability in aqueous environments, satisfies the regulatory criteria. Thus, based on the results of this study, it seems that phosphate ceramics are viable option for containment of salt wastes.

Download or read book Processing and Properties of Advanced Ceramics and Composites III written by Narottam P. Bansal and published by John Wiley & Sons. This book was released on 2011-07-12 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 17 papers from the Innovative Processing and Synthesis of Ceramics, Glasses and Composites and Advances in Ceramic Matrix Composites symposia held during the 2010 Materials Science and Technology (MS&T'10) meeting, October 17-21, 2010, Houston, Texas. Topics include: Fiber Composites; Modeling and Characterization; Nanomaterials; Testing; Microstructure-Property Relationships; Advanced Coatings; and Processing Methods.