lixiviation


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lixiviation

 [lik-siv″e-a´shun]
separation of soluble from insoluble material by use of an appropriate solvent, and drawing off the solution.
References in periodicals archive ?
The latter, can be interpreted as result of the low filled level and a concentration of mineral substances coming from the lixiviation and run off proceses from earth's crust.
Sample Surface area [E.sub.g] ([m.sup.2] (eV) [g.sup.-1]) Ag@Ti[O.sub.2] 0.5 52.1 2.48 Ag@Ti[O.sub.2] 1.0 51.4 2.41 Ag@Ti[O.sub.2] 2.5 52.9 2.25 Ag@[H.sub.2][Ti.sub.3][O.sub.7] 0.5 287.1 2.76 Ag@[H.sub.2][Ti.sub.3][O.sub.7] 1.0 297.1 2.87 Ag@[H.sub.2][Ti.sub.3][O.sub.7] 2.5 188.2 2.73 Sample Crystalline phases Ag@Ti[O.sub.2] 0.5 Anatase, rutile Ag@Ti[O.sub.2] 1.0 Anatase, rutile Ag@Ti[O.sub.2] 2.5 Anatase, rutile Ag@[H.sub.2][Ti.sub.3][O.sub.7] 0.5 [H.sub.2][Ti.sub.3][O.sub.7] Ag@[H.sub.2][Ti.sub.3][O.sub.7] 1.0 [H.sub.2][Ti.sub.3][O.sub.7] Ag@[H.sub.2][Ti.sub.3][O.sub.7] 2.5 [H.sub.2][Ti.sub.3][O.sub.7] TABLE 2: Silver lixiviation test during the photocatalytic degradation of ATL at 10 ppm and pH normal.
Alvarez JM, Rico MI, Obrador A (1996) Lixiviation and extraction of zinc in a calcareous soil treated with zinc-chelated fertilizers.
In contrast, necrosis is nonphysiological, is dissociated from morphogenetic events and is related to development, being directly involved with cell turgidity and lysis and lixiviation of the cellular content, without obvious changes in DNA (for instance, without chromatin condensation and DNA fragmentation) (KRISHNAMURTHY et al., 2000; XU et al., 2004).
According to the environmental impact assessment canned out by the company itself, the project required 1200 tons of cyanide for lixiviation and 7000 tons of explosives on a monthly basis, yielding 745 million tons of waste per year (CENSAT Agua Viva, 2011; Florez, 2012).
Phytostabilization This refers to the use of plants in order to reduce the bioavailability of the organic and inorganic contaminants by immobilizing them through the addition of amendments to the soil, the absorption or the roots of the plants or soil particles, and the precipitation in the area of the root in order to hinder their migration and the decrease of erosion, the runoff, and the lixiviation (Van Deeps, 2006; Kumpiene et al., 2007).
However, it is probable that at early rainy season both the ammonium and nitrate could be lost due to lixiviation and runoff.
Konik, "The new way of alumina lixiviation from sinters containing 12CaO.7[Al.sub.2][O.sub.3] in J.
Using the predicted CP at 60 days and the expected yields we calculate an estimation of the N demand to apply a proper fertilization program avoiding N lixiviation. An estimated 34.57 kg N ha-1 is provided from the mentioned decrease of the content of nitrate in soil.
According to these authors, N losses occurred (by lixiviation) and there was a later immobilization phase and residues with low N content, such as stems, cobs and brackets, immobilized N at some point in their decomposition.
Cette rencontre prevoit une serie de conferences traitant entre autres des progres realises en la matiere, des methodes efficaces de gestion et de traitement des eaux de lixiviation au niveau des decharges controlees et de l'utilisation des geo-synthetiques dans le domaine des decharges.