Mostrando ítems 1-10 de 61
Selección y caracterización de un biomaterial capaz de remover cromo hexavalente y cromo total de soluciones acuosas
(23/03/2010)
ABSTRACT: A selection of inactive biological materials capable of removing hexavalent chromium
[Cr(VI)] and total chromium from Cr(VI) aqueous solutions was carried out in this work.
Of the 71 biological materials tested, ...
Estudo de procedimentos analíticos para determinação de Cr(III) e Cr(VI) em amostras sólidas.
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Química - PPGQ, 2006-03-02)
The legislation is evolving towards the establishment of restrictions to the concentration of Cr(VI), the most toxic redox form of chromium, in solid materials. This aspect has stimulated the development of sample preparation ...
Biosorción de Cr (VI) en solución acuosa utilizando cáscara de membrillo, en un sistema por lotes
(Universidad Michoacana de San Nicolás de Hidalgo, 2013-02)
The main objective of this study was to evaluate the removal of Cr (VI) and total chromium quince shell, using a batch system. Were placed 5 g/L of biosorbent in 3 beakers containing 200 mL of a solution of potassium ...
Reproducción de Cr VI y biosorción de cromo por materiales biológicos inactivos
(30/06/2009)
ABSTRACT: Chromium compounds are widely used in a great number of industrial processes. The most stable oxidation states of chromium in the environment are the hexavalent [Cr(VI)] and trivalent [Cr(III)]. Cr(VI) is highly ...
Especiação redox de crômio em amostras de solos contaminados
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Química - PPGQ, 2012-03-21)
Chromium and its compounds are employed in various industrial processes, and these activities are responsible for the disposal of significant amounts of materials containing this element in the environment. Due to the known ...
Evaluación de carbón activado de semillas de datura como material adsorbente de metales (cromo VI y plomo II)
(Escuela Superior Politécnica de Chimborazo, 2021-11-26)
The present investigation work objective deals with evaluating the performance of the
activated carbon obtained from datura seeds as a metal adsorbent (Chromium VI and Lead
II); a carbonization of the datura seeds and ...