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Showing 1 to 20 of 27 for “"leaching tests"”.
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A study of leaching tests for cement stabilised waste
… was subjected to batch, column, and dynamic leaching tests, and the leaching behaviour of arsenic, copper, lead, selenium, and zinc was investigated. Batch tests included the Australian Bottle Leaching Procedure (ABLP, AS 4493.3-1997), Toxicity Characteristic Leaching Procedure (TCLP, USEPA …
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Stabilization/solidification of lead contaminated soil using cement incorporated with sugarcane bagasse
… test and Water Absorption test. In addition, leaching tests were performed to identify the leachate criteria of lead during treatment. Two leaching tests were conducted and they were the Toxicity Characteristic Leaching Procedure (TCLP) and Synthetic Precipitation Leaching Procedure (SPLP). …
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Arsenic Stability In Fresh and Aged Amorphous Ferric Hydroxide Sludges Generated from Brine Treatment Processes
… of which is the EPA Toxicity Characteristics Leaching Procedure (TCLP). These tests indicate that common ABSRs may be disposed in mixed-solid waste landfills. However, this and previous work shows that these testing methods may significantly underestimate the degree and mechanism of arsenic …
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Stabilisation and solidification of contaminated soil using cement and sugarcane bagasse ash (SCBA)
… Absorption and Permeability test. In addition, leaching tests were performed to identify the leachate behavior of heavy metals during treatment. Three leaching tests were conducted and they were the Toxicity Characteristic Leaching Procedure (TCLP), Synthetic Precipitation Leaching Procedure …
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The Leaching of Cobalt in Platinum-Cobalt Fuel Cell Catalysts
… fuel cells. These catalysts, however, undergo leaching of cobalt in the harsh environment of the fuel cell during its operation as well as during catalyst ink preparation and conditioning. Several methods have been developed and are currently being used to characterise this leaching, however, …
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Investigation of Chalcopyrite Leaching Kinetics by Alternative Leaching Chemicals
… sulfide mineral due to passivation during leaching process in a conventional leaching system. In this study, alternative lixiviants, MSA (methanesulfonic acid, CH4SO3) and sulfurous acid (H2SO3) were investigated to enhance leaching kinetic. In addition, alternative oxidants, hydrogen …
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Hydrothermal Process for Bioenergy Production From Corn Fiber and Swine Manure
… manure such as lipid and protein. The separate leaching tests further convince that the toluene soluble oil yield almost proportionally increase with the lipid and protein content in swine manure. The product distributions at different reaction time imply that swine manure experiences a …
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Biological and Chemical Oxidation of Sulfidic Minerals at Alkaline pH
… and chemical changes in the samples. Gold leaching tests with conventional cyanidation techniques were performed on oxidized samples to determine the relationship between oxidation and gold recovery.
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Electrochemical study of gold thiosulfate extraction process
… Corporation has commercialized thiosulfate gold leaching process in Goldstike mine in Nevada, USA. However, there is still potential for technical improvements to achieve higher process efficiency. The purpose of this study is to examine gold thiosulfate leaching chemistry and to suggest …
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Analysis of coal combustion by-product disposal practices in an arid climate : leachate water quality
… years old. These samples were subjected to batch leaching tests as well leaching in unsaturated column tests. The mineralogy and physical characteristics of the CCBs and spoil were determined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The analyses found that unburied and …
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Deep Eutectic Solvents for the Leaching of Cobalt from Oxide Ores
… to be liberated. Given this property, subsequent leaching experiments centred around the use of Type III ChCl-based DESs composed of carboxylic acids, which serve as reducing/complexing agents, and therefore likely to exhibit a propensity for selective Co dissolution. Batch leaching tests were …
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The mechanical behavior of normally consolidated soils as a function of pore fluid salinity
… 40 MPa in a modified CRS device. All triaxial tests were performed in a low pressure triaxial apparatus. The shear behavior of all soils was obtained in the normally consolidated region. Several reverse leaching tests were performed in the CRS cell whereby high salinity pore water was flushed …
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Urban stormwater runoff contamination associated with gutter and pipe material degradation
… affect contaminant losses during controlled tests examining the expected range of these characteristics. Static leaching tests for eight pipe and gutter materials were conducted over two separate three month periods during which pipe and gutter test materials were exposed to roof runoff and …
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Performance assessment of stabilised/solidified waste-forms
… by examining the microstructure, mineralogy, leaching behaviours and mechanical properties of the aged soils. Risk indicators for the performance of S/S soils were identified and they included reactions involving sulfates, carbonation, microcracking and the presence of weathered minerals. …
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Evaluating Leachability of Residual Solids Generated from Unconventional Shale Gas Production Operations in Marcellus Shale
… environments. For this purpose, laboratory leaching experiments were employed wherein representative samples were brought into contact with a liquid to determine the constituents that would be leached by the liquid and potentially released into the environment. The samples used included …
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Modern landfill leachates – quality and treatment
… quality in modern landfills. Biodegradation and leaching tests were employed on wastes typical of a waste manage¬ment system shifting away from landfilling. Multivariate data analysis using principal component analysis and canonical correlation analysis was employed to identify processes …
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Correlations between the Mineralogy and Recovery Behavior of Rare Earth Elements (REEs) in Coal Waste
… of mineralogy of REEs after recovery, the leaching solid residues of the raw and calcined coal waste samples were also characterized by SEM-EDS analysis. After REE recovery, the same REE mineralogical results were observed from the leaching residues of the raw coal waste samples. However, …
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Municipal Solid Waste Incineration (MSWI) Ash Characterization and Physical Concentration
… sequential chemical extraction and acid-leaching tests were conducted. The results from this section revealed that carrying out a combination of beneficiation processes using the MSWI-BA sample previously classified into the coarse, middle, and fine-size fractions could lead to better …
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Investigating the properties of persistent organic carbon in municipal wastewater treatment biosolids
… desorbable dissolved organic carbon (DDOC) using leaching tests. Leachates were then assessed for their relative quantity of persistent DDOC (PDDOC) using biodegradation experiments and optical properties of both DDOC and PDDOC were examined using UV-Vis and FTIR analysis. Sludges from primary and …
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Purification of C-phycocyanin from Spirulina - adsorption pretreatment options
… cosmetic-grade C-PC reliably and efficiently. Leaching tests of the Carbocraft Spirulina used in this research project yielded an optimal period of 17 to 24 hours for the C-PC extraction from the Spirulina and showed that a cell disruption step was not necessary for this specific powder. …
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