Results 111 to 120 of about 16,783 (163)

Leaching and selective zinc recovery from acidic leachates of zinc metallurgical leach residues

Journal of Hazardous Materials, 2017
Zinc (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 ...
Eric D van Hullebusch, Manivannan Sethurajan, Rohan Jain   +2 more
exaly   +4 more sources

Optimal Cluster Head Selection in the LEACH Architecture

2007 IEEE International Performance, Computing, and Communications Conference, 2007
LEACH (low energy adaptive clustering hierarchy) (W. Heinzelman et al., 2000) is one of the popular cluster-based structures, which has been widely proposed in wireless sensor networks. LEACH uses a TDMA based MAC protocol, and in order to maintain a balanced energy consumption, suggests that each node probabilistically become a cluster head. To reduce
Haiming Yang, Biplab Sikdar 0001
openaire   +2 more sources

Pore Development during Selective Leaching

Journal of The Electrochemical Society, 1984
Fabrication du cuivre Raneg, important catalyseur industriel par lixiviation d'un alliage Cu 50% en poids Al, aboutissant a un cuivre tres poreux. A temperature constante, l'espacement des pores croit si la vitesse de lixiviation diminue. La conversion du CuAl 2 dans l'alliage de depart en Cu poreux est consideree comme une transformation de ...
A. D. Tomsett, D. J. Young, M. S. Wainwright   +2 more
openaire   +1 more source

Life cycle assessment and residue leaching: The importance of parameter, scenario and leaching data selection

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., Butera, S., Kosson, D.S., Zomeren, A. van, Sloot, H.A. van der, Astrup, T.F.   +5 more
openaire   +3 more sources

Surface modification of mechanochemically activated kaolinites by selective leaching

Journal of Colloid and Interface Science, 2006
Low- 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, Zsuzsa, Senkár, János, Kristóf, Veronika, Vágvölgyi   +3 more
openaire   +2 more sources

A Time-based Cluster-Head Selection Algorithm for LEACH

2008 IEEE Symposium on Computers and Communications, 2008
A 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
openaire   +1 more source

Leaching of Selected Elements from Coal Ash Dumping

2005
Coal 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., Radmanovic, D., Đorđević, Dragana, Polić, Predrag   +3 more
openaire   +3 more sources

Seasonal effects of leached mirex on selected estuarine animals

Archives of Environmental Contamination and Toxicology, 1975
Four 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
openaire   +2 more sources

‘Green’ leaching: recyclable and selective leaching of gold-bearing ore in an ionic liquid

Green Chem., 2004
The 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., Lawrance, Geoffrey A., McCluskey, Adam   +2 more
openaire   +1 more source

Direct selective leaching of chalcopyrite concentrate

Canadian Metallurgical Quarterly, 2014
AbstractThe ammonium persulphate (APS) leaching of chalcopyrite concentrate in the presence of ammonium carbonate was studied. The effects of ammonium carbonate concentration, APS concentration, leaching time, leaching temperature, solid/liquid ratio and stirring speed were investigated.
openaire   +1 more source