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TL, EPR and optical absorption studies on natural alexandrite compared to natural chrysoberyl
(2002-10-19)
The TL, optical absorption (OA) and EPR properties of natural Brazilian alexandrite and chrysoberyl have been investigated. The TL measurements for natural alexandrite show five peaks between 100 and 450°C, with their ...
Tratamento do poluente emergente 17α-etinilestradiol utilizando processo oxidativo avançado foto-fenton
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia Química, 2020-12-02)
In the last decades, many studies have focused on the contamination of water by organic micropollutants, including emerging contaminants, such as: pharmaceutical products and hormones. Conventional methods of water treatment ...
TL, EPR and optical absorption studies on natural alexandrite compared to natural chrysoberyl
(2002-10-19)
The TL, optical absorption (OA) and EPR properties of natural Brazilian alexandrite and chrysoberyl have been investigated. The TL measurements for natural alexandrite show five peaks between 100 and 450°C, with their ...
Activation of bacteria in agglomerated ores by changing the composition of the leaching solution
(ELSEVIER, 2003-10)
This work presents preliminary results of a study to determine the technical feasibility of heap bioleaching of copper sulfides in a mixed ore that had previously undergone a chemical leach to recover the copper from the ...
EIS studies of chalcopyrite involving iron(II) ions
(2017-01-01)
In this work, we present an Electrochemical Impedance Spectroscopy (EIS) study using a carbon paste electrode modified with chalcopyrite (CuFeS2) containing 50 wt% of the mineral (particle size < 38 μm) and graphite (particle ...
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 ...