Results 31 to 40 of about 8,465 (222)

Lixiviation multi-échelles de cendres d'incinération d'ordures ménagères [PDF]

Environnement, Ingénierie & Développement, 2006
Predicting the impact on the subsurface and groundwater, of a pollutant source such as domestic waste incineration residues, requires a knowledge of the so-called “source term”. The source term describes the manner in which concentrations in dissolved elements emitted by the waste evolve over time, for a given percolation scenario.
Guyonnet, Dominique, Bodénan, Françoise, Brons-Laot, Gwenaëlle, Burnol, André, Chateau, Laurent, Crest, Marion, Méhu, Jacques, Moszkowicz, Pierre, Piantone, Patrice   +8 more
openaire   +2 more sources

Gold leaching from ores using biogenic lixiviants – A review

Current Research in Biotechnology, 2022
The recovery of gold from different sources, such as ores and concentrates, commonly is carried out in industry using cyanidation because it has the advantage of high selectivity of gold over other elements. However, cyanidation has some technical, economic, and environmental limitations.
Esmaeil Jorjani, Halimeh Askari Sabzkoohi   +1 more
openaire   +2 more sources

Recycling Spent Fluorescent Lamp Glass Waste in Calcium Aluminate Cement: Effects on Hydration and Mechanical Performance

Applied Sciences
Calcium aluminate cement (CAC) offers rapid strength development, chemical durability in harsh environments, and high-temperature resistance, but its long-term performance may be compromised by the conversion of metastable hexagonal hydrates into stable ...
Lucía Reig, Ángel M. Pitarch, Antonio Gallardo, Lourdes Soriano, María V. Borrachero, Jordi Payá, José M. Monzó   +6 more
doaj   +1 more source

Etude écologique des conditions de manifestation de la chlorose ferrique dans le vignoble de la moyenne vallée de la Loire *

OENO One, 1979
Dans la région viticole du Val de Loire le potentiel chlorosant des différentes formations géologiques calcaires est très variable. Il apparaît très lié à la quantité de fer extractible à l'oxalate d'ammonium qui est importante sur certains substrats ...
J. Dupont, René Morlat, Jean Salette
doaj   +1 more source

AVALIAÇÃO DO LIXIVIADO DE IMIDAZOLINONAS POR MEIO DE BIOENSAIO EVALUATION OF THE LEACHATE OF IMIDAZOLINON BY MEANS OF BIOESSAY

Pesquisa Agropecuária Tropical, 2007
<!-- @page { margin: 2cm } --> <p class="western" align="justify">A contaminação de águas subsuperficiais por agrotóxicos decorre principalmente da lixiviação de seus resíduos. Neste trabalho, estudou-se a lixiviação dos herbicidas imazamox e
Hugo A. Ruiz, Antônio Alberto da Silva, Roberto Kazuhiko Zito, Antônio Pasqualetto   +3 more
doaj   +1 more source

LIXIVIAÇÃO DE IMAZETHAPYR E IMAZAMOX EM DIFERENTES SOLOS LIXIVIATION OF IMAZETHAPYR AND IMAZAMOX IN DIFFERENT SOILS

Pesquisa Agropecuária Tropical, 2007
<!-- @page { margin: 2cm } --> <p class="western" align="justify">O uso de herbicidas nos cultivos agrícolas tem aumentado progressivamente. Concomitantemente, houve também uma crescente preocupação com o meio ambiente, no sentido de prevenir
Antônio Alberto da Silva, Hugo A. Ruiz, Roberto Kazuhiko Zito, Antônio Pasqualetto   +3 more
doaj   +1 more source

A New Approach for Increasing the Chelating Capacity of the Tartrate Ion in the Extraction of Copper from Ores

Metals, 2023
The role of the tartrate ion in the extraction of copper from oxidized ore in aqueous alkaline medium is first reported. This was demonstrated by a sequential evaluation of the following: (i) The formation of an ionic complex resulting from the ...
Félix J. Sueros Velarde, Jhon A. Quispe Ortiz, Angie A. Hidalgo Apaza, Angela F. Danil de Namor   +3 more
doaj   +1 more source

Fecal Steroids as Tracers of Human Population and Waste Management Practices at the Ancient Maya City of Ucanal, Guatemala

Archaeometry, EarlyView.
ABSTRACT Geochemical data compiled from dried sediments from three water reservoirs at the ancient Maya city of Ucanal, Petén, Guatemala, reveal low to undetectable fecal biomarker concentrations. These low concentrations may be the result of the aerobic decay of sterols combined with well‐managed waste disposal practices.
Jean D. Tremblay, Peter M. J. Douglas, Christina T. Halperin, Yves Gélinas   +3 more
wiley   +1 more source

Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite [PDF]

Materials Research, 2013
The reactivity of clay minerals leached in grafting reactions was investigated. Precursor solids were prepared by treating the sodium vermiculites with nitric acid solutions at several concentrations.
Ana P. M. Alves, Maria G. Fonseca, Albaneide Fernandes Wanderley   +2 more
doaj   +3 more sources

Study of thorium and uranium isotopes activity concentration after percolation or agitation leaching, in mining lixiviation liquor samples

Brazilian Journal of Radiation Sciences, 2020
This work refers to determination of thorium and uranium isotopes in the mining lixiviation liquor samples. The analytical procedure involves sample preparation steps for rare earth elements, thorium and uranium separation, besides alpha spectrometry ...
Aluisio Souza Reis, Roberto Pellacani Guedes Monteiro   +1 more
doaj   +1 more source