162,780 research outputs found
Efficient recovery of copper from a copper converter dust via thin layer leaching and solvent extraction
No full textThe production of flue dusts is inherent in copper pyrometallurgy. These flue dusts are originated in the three types of furnaces used: flash, reverberatory and converters, and all have the same characteristics: a high content of copper accompanying with a miriade of other elements. This is because these dusts can be considered profitables (copper) and hazardous (arsenic, etc.), the above together with the non desirable option of their recycling to the corresponding furnace, make of a necessity their treatment prior to their eventual dumping. The present investigation deals with the treatment of one of these dusts, a converter dust, via hydrometallurgical treatment. The high copper content of the starting material (74 % copper in which 30% is metallic copper), makes any conventional leaching unusable, thus, an advanced option like thin layer leaching of the dust with nitric acid, followed by dissolution in water, leads to a pure copper solution. However, the purity and copper concentration in the solution can be increased via solvent extraction, and a counter-current circuit using Acorga PT5050 dissolved in a kerosene diluent as extractant phase has been proved during 80 hours. The results indicated that a net copper gain of near 12 g/L copper is achieved and the exiting aqueous solution can feed a copper electrowinning plant
Reseña de: Andreu Pintado, J., Blanco Pérez, A., Alguacil Villanúa, E. (eds.): Pecunia communis: Recursos económicos y sostenibilidad de las pequeñas ciudades hispanorromanas
No full textBook Review: Andreu Pintado, J., Blanco Pérez, A., Alguacil Villanúa, E. (eds.): Pecunia communis: Recursos económicos y sostenibilidad de las pequeñas ciudades hispanorromanas, Serie de Monografías Los Bañales, Uncastillo, 2023, 308 pp., ISBN: 978-84-09-53856-0Reseña de: Andreu Pintado, J., Blanco Pérez, A., Alguacil Villanúa, E. (eds.): Pecunia communis: Recursos económicos y sostenibilidad de las pequeñas ciudades hispanorromanas, Serie de Monografías Los Bañales, Uncastillo, 2023, 308 pp., ISBN: 978-84-09-53856-0
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Gaceta sanitaria in 2023. The show must go on. Goodbye and thanks
No full textBermúdez-Tamayo C., Negrín Hernández M., Alguacil J., Cantarero D., Carrasco-Portiño M., Casino G., García Calvente M., Hernán M., Posenato García L., Ruiz Cantero M.T., Segura A., García Amez J., Juárez Herrera y Cairo L.A., March J.C., Marcos-Marcos J., Mar J., Peiró R., Álvarez-Dardet C
Gaceta sanitaria in 2021. Protecting the planet to protect health
No full textHernández MN, Bermúdez-Tamayo C, Alguacil J, Cantarero D, Casino G, Santillán A, Calvente MG, Epstein D, Hernán M, García LP, Portiño MC, Cantero MTR, Segura A, Amez JG, Juárez L, Miranda JJ, Tejero MF, March JC, Marcos-Marcos J, Cucunubá ZM, Lumbreras B, Mar J, Peiró R, Álvarez-Dardet
Recovery of aluminium from a hazardous waste by precipitation as boehmite
No full textEn: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.-- 4 pages, 4 figures.Boehmite was synthesized by a low temperature
hydrothermal procedure, via sol-gel, from an
aluminium hazardous waste (AHW). The method
consisted of a first stage of acid digestion to
solubilize the metal content, and a second stage of
gel precipitation in alkaline medium. Several
experiments were performed to study the effect of
concentration, time and pH not only on the recovery
of aluminium but on the purity of boehmite. A
nanocrystalline boehmite was obtained as unique
phase at pH8. At pH9 boehmite is obtained along
with norstrandite. The complete characterization of
samples was carried out by XRD, MEB, and
TG/DTA. The procedure allows the recovery of 90%
of the soluble aluminium content in the waste.The authors thank the MEC for the financial support (Project
CTM2005-01964) and the company Recuperaciones y
Reciclajes Roman S.L. (Fuenlabrada, Madrid, Spain) for
supplying AHW. Laura Gonzalo-Delgado is grateful to the CSIC
(Spanish National Research Council) for her I3P contract.Peer reviewe
Involvement of citizenship in hazardous waste management and in use of recycling centres in Madrid city (Spain)
No full text4 pages, 1 figure, 1 table.-- En: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.The present study analyses the hazardous waste
management by citizens via Fixed Recycling (FRC)
and Mobile Centres (MRC) with the aim of
suggesting improvements of both services. In
addition, the effectiveness of a campaign for
environmental education developed by the Madrid
council was assessed. A questionnaire was carried
out on a sample of 5644 inhabitants of four different
districts of Madrid City. Data were treated
quantitatively using SPSS 17.0 and categorized
using content analysis. It was found that the
campaign effectively promoted the existence and use
of Recycling Centres and was able to identify
possible amendments to improve future campaigns.We acknowledge main support of Environmental
Education Group in last years.Peer reviewe
Murder on the mountain: author talk with Peter J. Wosh
No full textAuthor talk by Peter J. Wosh on May 5th, 2022, on his book, "Murder on the Mountain: crime, passion, and punishment in gilded age New Jersey.
Gaceta Sanitaria in 2022. Maximum historical impact factor and suitability for continuous publication
No full textBermúdez-Tamayo C., Negrín Hernández M., Alguacil J., Cantarero D., Carrasco Portiño M., Casino G., García Calvente M., Hernán M., Posenato Garcia L., Ruiz Cantero M.T., Segura A., García Amez J., Juárez L., Miranda J.J., March J.C., Marcos-Marcos J., Mar J., Peiró R., Álvarez-Dardet C
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