Download or read book Stabilization of Mercury in Waste Material from the Sulfur Bank Mercury Mine written by and published by . This book was released on 2004 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stabilization of Mercury in Waste Material from the Sulfur Bank Mercury Mine written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USING THE SULFUR POLYMER STABILIZATION SOLIDIFICATION PROCESS TO TREAT RESIDUAL MERCURY WASTES FROM GOLD MINING OPERATIONS written by B.ADAMS BOWERMAN (J.KALB, P.WAN, R. Y.LEVIER.) and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large quantities of mercury are generated as a by-product during the processing of gold ore following mining operations. Newmont Mining Corporation (NMC), which operates some of the world's largest gold mines, sought a method to permanently ''retire'' its mercury by-products, thereby avoiding potential environmental liability. Sulfur Polymer Stabilization-Solidification (SPSS) is an innovative technology developed at Brookhaven National Laboratory (BNL) for treatment of mercury and mercury contaminated materials, such as soil, sludge and debris. BNL conducted a treatability study to determine the potential applicability of SPSS for treatment of Newmont mercury, and the treated product passed the U.S. Environmental Protection Agency (EPA) test for toxicity. The SPSS process has been shown to be effective on radioactive and nonradioactive mercury and mercury-contaminated materials with a pilot-scale batch system capable of producing 0.03 m{sup 3} (1 ft{sup 3}) per batch. Engineering scale-up issues are discussed and material property tests addressing these issues are described.
Download or read book Characterization and Eh pH based Leaching Tests of Mercury containing Mining Wastes from the Sulfur Bank Mercury Mine Lake County California written by and published by . This book was released on 2001 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contaminated Land Management written by Judith Nathanail and published by EPP Publications. This book was released on 2011-11 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulphur Bank Mercury Mine Superfund Site Clear Lake California written by Thomas H. Suchanek and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPD Congress 2003 written by M. E. Schlesinger and published by . This book was released on 2003 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th edition in the EPD Congress series, this volume is concerned with environmental issues, reflecting the increased significance of this facet of metals production and processing. A centerpiece of this volume is the proceedings on mercury management in metals production and recycling, an area in which the breadth of expertise within TMS provides a unique opportunity for comprehensive examination of the topic.
Download or read book Stability Transformations and Fate of Residual Mercury at the Inoperative New Idria Mercury Mine New Idria California written by Adam Douglas Jew and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury mining in the California Coast Range has resulted in over a thousand mercury mines of various sizes that have yet to be remediated and are potential point sources of Hg pollution. The New Idria mine, located in San Benito County, California, was the second largest mercury mine in North America and was not remediated following its closure in 1972. Only within the past two years has it been designated as an EPA Superfund site and is currently undergoing remediation. This thesis focuses on the stability of mercury remaining at the site, the types of mercury phases present at the site as well as downstream from it, and the transport of mercury from the site. The stability of cinnabar (HgS), the primary mercury-bearing phase at the New Idria mine and other mercury mines in the California Coast Range, was investigated in the presence of microorganisms found in the acid mine drainage (AMD) system at the site. Geomicrobiological and geochemical studies of the identity and effects of these microorganisms on the solubility of HgS identified Thiomonas species and showed that the AMD bacterial consortium significantly enhances the solubility of cinnabar and metacinnabar, the two common HgS crystalline phases present. These two phases are very insoluble (Ksp = 10^-54 and 10^-52, respectively) in the absence of these bacteria and are often considered to be relatively nonbioavailable. The phases of mercury present in the waste piles and downstream sediments were analyzed using a combination of sequential chemical extractions and synchrotron-based techniques, including a new low-temperature extended x-ray absorption fine structure (EXAFS) spectroscopy method developed in this project. This new method allows, for the first time, quantification of the amount of elemental mercury present in complex mine waste samples and associated sediments that contain a variety of Hg-bearing phases. When coupled with field- and lab-based evasion studies of Hg vapor from mine wastes, this new approach showed that high mercury evasion rates into the atmosphere from the New Idria and other Hg mine sites in the California Coast Range can be positively correlated with high levels of elemental Hg in the mine wastes. Another new discovery from this study is that freshwater diatoms in the New Idria drainage system are one of the major sinks for mercury. Selective chemical extraction and EXAFS studies of the species of mercury associated with diatom frustules showed that these frustules can stably sequester mercury in low bioavailability forms. These studies also showed that the abundant iron-(oxy)hydroxide (ferrihydrite) nanoparticles present in the New Idria drainage system have very little associated mercury, which contradicts long-held assumptions that sorption of Hg(II) on these nanoparticles is a major Hg sequestration and transport mechanism in the New Idria drainage system. A general conclusion from this study is that the majority of mercury in the New Idria drainage system is in relatively stable, low bioavailability forms. The understanding gained from this study of the stability, forms, and transport of mercury at the New Idria site can be extrapolated to other similar inoperative mercury mine sites in the California Coast Range and should aid in their future remediation efforts.
Download or read book Technologies for the Stabilization of Elemental Mercury and Mercury containing Wastes written by Sven Hagemann and published by . This book was released on 2009 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stabilization and Testing of Mercury Containing Wastes written by and published by DIANE Publishing. This book was released on 2001 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Minerals Yearbook written by Geological Survey and published by U.S. Government Printing Office. This book was released on 2016-11-15 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, covering metals and minerals, contains chapters on approximately 90 commodities. In addition, this volume has chapters on mining and quarrying trends and on statistical surveying methods used by Minerals Information, plus a statistical summary.
Download or read book Final Disposal Options for Mercury written by and published by . This book was released on 1994 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory testing was completed on chemical stabilization and physical encapsulation methods that are applicable (to comply with federal and state regulations) to the final disposal of both hazardous and mixed hazardous elemental mercury waste that is in either of the following categories: (1) waste generated during decontamination and decommissioning (D and D) activities on mercury-contaminated buildings, such as Building 9201-4 at the Oak Ridge Y-12 Plant, or (2) waste stored and regulated under either the Federal Facilities Compliance Agreement or the Federal Facilities Compliance Act. Methods were used that produced copper-mercury, zinc-mercury, and sulfur-mercury materials at room temperature by dry mixing techniques. Toxicity Characteristic Leaching Procedure (TCLP) results for mercury on batches of both the copper-mercury and the sulfur-mercury amalgams consistently produced leachates with less than the 0.2-mg/L Resource Conservation and Recovery Act (RCRA) regulatory limit for mercury. The results clearly showed that the reaction of mercury with sulfur at room temperature produces black mercuric sulfide, a material that is well suited for land disposal. The results also showed that the copper-mercury and zinc-mercury amalgams had major adverse properties that make them undesirable for land disposal. In particular, they reacted readily in air to form oxides and liberate elemental mercury. Another major finding of this study is that sulfur polymer cement is potentially useful as a physical encapsulating agent for mercuric sulfide. This material provides a barrier in addition to the chemical stabilization that further prevents mercury, in the form of mercuric sulfide, from migrating into the environment.
Download or read book Transactions of Society for Mining Metallurgy and Exploration Inc written by and published by . This book was released on 1990 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Demonstration of ATG Process for Stabilizing Mercury 260 Ppm Contaminated Mixed Waste Mixed Waste Focus Area OST Reference 2407 written by and published by . This book was released on 1999 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury contaminated wastes in many forms are present at various U.S. Department of Energy (DOE) sites. Based on efforts led by the Mixed Waste Focus Area (MWFA) and its Mercury Working Group (HgWG), the inventory of wastes contaminated with 260 ppm mercury and with radionuclides stored at various DOE sites is estimated to be approximately 6,000 m3). At least 26 different DOE sites have this type of mixed low-level waste in their storage facilities. Extraction methods are required to remove mercury from waste containing260 ppm levels, but below 260 ppm Hg contamination levels the U.S. Environmental Protection Agency (EPA) does not require removal of mercury from the waste. Steps must still be taken, however, to ensure that the final waste form does not leach mercury in excess of the limit for mercury prescribed in the Resource Conservation and Recovery Act (RCRA) when subjected to the Toxicity Characteristic Leaching Procedure (TCLP). At this time, the limit is 0.20 mg/L. However, in the year 2000, the more stringent Universal Treatment Standard (UTS) of 0.025 mg/L will be used as the target endpoint. Mercury contamination in the wastes at DOE sites presents a challenge because it exists in various forms, such as soil, sludges, and debris, as well as in different chemical species of mercury. Stabilization is of interest for radioactively contaminated mercury waste (
Download or read book Treatment of Mercury Containing Waste written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A process is provided for the treatment of mercury containing waste in a single reaction vessel which includes a) stabilizing the waste with sulfur polymer cement under an inert atmosphere to form a resulting mixture and b) encapsulating the resulting mixture by heating the mixture to form a molten product and casting the molten product as a monolithic final waste form. Additional sulfur polymer cement can be added in the encapsulation step if needed, and a stabilizing additive can be added in the process to improve the leaching properties of the waste form.
Download or read book Demonstration of NFS DeHg Process for Stabilizing Mercury 260 Ppm Contaminated Mixed Waste Mixed Waste Focus Area OST Reference Number 2229 written by and published by . This book was released on 1999 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury-contaminated wastes in many forms are present at various U.S. Department of Energy (DOE) sites. Based on efforts led by the Mixed Waste Focus Area (MWFA) and its Mercury Working Group (HgWG), the inventory of wastes contaminated with 260 ppm mercury and with radionuclides stored at various DOE sites is estimated to be approximately 6,000 m3 (Conley, Morris, Osborne-Lee, and Hulet 1998). At least 26 different DOE sites have this type of mixed low-level waste in their storage facilities. Extraction methods are required to remove mercury from waste containing260 ppm levels, but below 260 ppm Hg contamination levels, the U.S. Environmental Protection Agency (EPA) does not require removal of mercury from the waste. Steps must still be taken, however, to ensure that the final waste form does not leach mercury in excess of the limit for mercury prescribed in the Resource Conservation and Recovery Act (RCRA) when subjected to the Toxicity Characteristic Leaching Procedure (TCLP). At this time, the limit is 0.20mg/L. However, in the year 2000, the more stringent Universal Treatment Standard (UTS) of 0.025 mg/L will be used as the target endpoint. Mercury contamination in the wastes at DOE sites presents a challenge because it exists in various forms, such as soil, sludges, and debris. Stabilization is of interest for radioactively contaminated mercury waste (
Download or read book Performance of Treatment Media for the Stabilization of Mercury Under Variable Geochemical Conditions written by Shannon Daugherty and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury-contaminated sediments are found in many locations throughout North America and the world. Release of Hg from such sediments and subsequent biological uptake can result in biomagnification in associated ecosystems. This study focused specifically on a stabilization technique involving the addition of reactive media to the sediment matrix to immobilize Hg and reduce its bioavailability. A series of batch and column experiments was conducted over a range of physical and geochemical conditions to evaluate the propensity of a diverse set of reactive media to stabilize Hg in sediment with high organic carbon and clay content. The additives, selected to promote adsorption and precipitation of Hg, included natural attapulgite (palygorskite) clay, organically-modified clay, elemental sulfur, a strong reductant, and mixtures thereof. The results of the batch experiments indicated that addition of reactive media to the sediment led to substantially lower aqueous concentrations of Hg relative to untreated sediment. The stabilization of Hg was observed to be dependent on mass of added reagent, with generally greater treatment observed for the higher masses of reagent evaluated. Aqueous concentrations of Hg were reduced from > 800 ng L-1 in control samples to 50 ng L-1 in treated samples for all of the reactive media at the highest mass proportions evaluated. The effectiveness of Hg stabilization using the sulfur-based blends was strongly affected by contact with atmospheric oxygen, with better treatment observed in oxygen-limited conditions. The results of the column tests showed that relatively low concentrations of Hg (
