Results 171 to 180 of about 706 (213)
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Leaching and selective zinc recovery from acidic leachates of zinc metallurgical leach residues
Journal of Hazardous Materials, 2017Zinc (Zn) leaching yields and kinetics from three different zinc plant leach residues (ZLR) generated in different periods (ZLR1>30 years, ZLR2 5-30 years and ...
Sethurajan, Manivannan +6 more
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Waste Management, 2015
Residues from industrial processes and waste management systems (WMSs) have been increasingly reutilised, leading to landfilling rate reductions and the optimisation of mineral resource utilisation in society. Life cycle assessment (LCA) is a holistic methodology allowing for the analysis of systems and products and can be applied to waste management ...
Allegrini, E. +5 more
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Residues from industrial processes and waste management systems (WMSs) have been increasingly reutilised, leading to landfilling rate reductions and the optimisation of mineral resource utilisation in society. Life cycle assessment (LCA) is a holistic methodology allowing for the analysis of systems and products and can be applied to waste management ...
Allegrini, E. +5 more
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Seasonal effects of leached mirex on selected estuarine animals
Archives of Environmental Contamination and Toxicology, 1975Four 28-day seasonal experiments were conducted using selected estuarine animals in outdoor tanks that received continuous flow of mirex-laden water. Mirex (dodecachlorooctahydro-1,3,4-metheno-2H-cyclobuta [cd] pentalene) leached from fire ant bait (0.3% mirex) by fresh water and then mixed with salt water was toxic to blue crabs (Callinectes sapidus),
M E, Tagatz, P W, Borthwick, J, Forester
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A Time-based Cluster-Head Selection Algorithm for LEACH
2008 IEEE Symposium on Computers and Communications, 2008A wireless sensor network consists of hundreds or thousands of small energy-limited sensors that are densely deployed in a large geographical region. It has been demonstrated that low-energy adaptive clustering hierarchy (LEACH) is an energy-efficient routing algorithm for wireless sensor networks (WSN).
Hu Junping, Jin Yuhui, Dou Liang
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Surface modification of mechanochemically activated kaolinites by selective leaching
Journal of Colloid and Interface Science, 2006Low- and high-defect kaolinites mechanochemically activated for different periods of time have been treated with sulfuric acid solution. These modified materials were analyzed using a combination of X-ray diffraction, thermogravimetry, chemical analysis, diffuse reflectance Fourier transform infrared spectroscopy, as well as specific surface area and ...
Eva, Makó +3 more
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Leaching of Selected Elements from Coal Ash Dumping
2005Coal ash obtained by coal combustion in the "Nikola Tesla A" power plant in Obrenovac near Belgrade (Serbia) is suspended in river water then carried by a pipeline to a dump. In order to predict the leachability and possible environmental impact of selected elements due to ionic strength of river water, we extracted coal ash with distilled water and 0 ...
Popović, Aleksandar R. +3 more
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‘Green’ leaching: recyclable and selective leaching of gold-bearing ore in an ionic liquid
Green Chem., 2004The recovery of gold and silver from ore in an ionic liquid is reported for the first time. The 1-butyl-3-methyl-imidazolium hydrogen sulfate ionic liquid (bmim+HSO4−) was employed, with iron(III) sulfate oxidant and thiourea added. Selective extraction of gold (≥85%) and silver (≥60%) from powdered ore (of dominantly chalcopyrite/pyrite/pyrrhotite ...
Whitehead, Jacqueline A. +2 more
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Stable cluster head selection in LEACH protocol
Proceedings of the 7th ACM India Computing Conference, 2014Optimal cluster head count plays a key role in determining the efficiency of a cluster based routing protocol. If the cluster head count will be more than the optimal value, aggregation advantage cannot be taken fully. If clusters are less, then there will be more aggregation load on the cluster head and communication load on the cluster members as ...
Payal Khurana Batra, Krishna Kant 0003
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Decommissioning of a selected heap leach dump
International Journal of Surface Mining, Reclamation and Environment, 1996ABSTRACT Cyanidation heap leaching is a prevalent low-cost method to extract gold from low-grade ores in the western United States. Relatively little is known about the geochemical processes which occur when a spent heap leach dump is rinsed to reduce the levels of potentially toxic constituents, however. Given that many heap leach dumps will be rinsed
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A Criterion for Selecting Leach Test Specimen Sizes
Nuclear Technology, 1982When leaching is controlled by a diffusion process, leach test results are particularly simple to interpret when test specimens approximate semi-infinite media. For spherical and cylindrical leach test samples, a criterion relating the test duration T, the specimen radius R, and the effective bulk diffusion coefficient D, to the desired degree of ...
Claudio Pescatore, Albert J. Machiels
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