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In situ recovery of copper sulfide ores: Alternative process schemes for bioleaching application
(Elsevier, 2020)
There is a growing interest in exploring the application of bioleaching for treating copper sulfide ores of decreasing grade and located at larger depth by in situ recovery (ISR) for its potential savings in ore extraction, ...
Cooperative action of attached and planktonic cells during bioleaching of chalcopyrite with Sulfolobus metallicus at 70 degrees C
(Elsevier, 2008)
The catalytic influence of Sulfolobus metallicus in the bioleaching of chalcopyrite at 70 degrees C and pH 1.5 was studied in shake flask experiments. Leaching was conducted in an iron-free basal medium with a -80 #+ 120 ...
Effect of an electrolyte flow on electrochemical hydrogen permeation
(Universidad Nacional de Colombia Sede Medellín, 2014-10-24)
The influence of an electrolyte flux injection over the detection side on pure iron membranes on electrochemical hydrogen permeation test was studied. A modified Devanathan´s cell was used in the experiments. This cell ...
Evaluation of the potential dietary impact of the implementation of nutritionally improved crops in rural areas of the department of Cesar (Colombia)
(Universidad Nacional de Colombia, 2015-09-01)
In Cesar, 30.7% of children under 5 years of age suffer from deficiencies of vitamin A, along with 13.4% for iron and 57.0% for zinc. Therefore, it is important to guarantee food security in the population through improvements ...
Remoción de hierro con almidón de maíz
(Universidad Escuela Colombiana de Ingeniería Julio GaravitoBogotá, 2013)
La coagulación química del agua se basa en el empleo de sales de hierro y aluminio, como el cloruro férrico y el alumbre, para proveer la remoción de los contaminantes del agua cruda. El uso de coagulantes naturales ofrece ...
Estado nutricional y hábitos alimenticios en niños de un colegio público de Valledupar
(2016-03-11)
Introducción: La desnutrición es una de las principales causas de deficiencias cognitivas en los niños lo que puede afectar su desarrollo motriz y rendimiento escolar; además de que conlleva a un mayor riesgo de enfermedades ...
Characterization of natural microcosms of estuarine magnetotactic bacteria
(Universidad Nacional de Colombia Sede Medellín, 2011)
To date, no complete study of magnetotactic bacteria’s (MTB) natural microcosms in estuarine or tropical environments has been reported. Besides, almost all the studies around magnetotactic bacteria have been based on fresh ...
Silver nanoparticle synthesis in human ferritin by photochemical reduction
(Elsevier, 2020)
Ferritin is a globular hollow protein that acts as the major iron storage protein across living organisms. The 8 nmdiameter internal cavity of ferritin has been used as a nanoreactor for the synthesis of various metallic ...
Luminescent hybrid material based on a clay mineral
(2007)
Clay minerals, and within these, the smectite group, including the hectorites in focus, possess layered structures, in which interlayer chemistry may be applied to functionalize them optically. While luminescence from ...
Copper Electrodeposition Kinetics Measured by Alternating Current Voltammetry and the Role of Ferrous Species
(Electrochemical Soc, 2016)
Impurities and additives play a key role in copper electrodeposition, in particular in upstream processes such as electrowinning or electrorefining. One common impurity is iron, mostly present as iron species Fe(II) in ...