Banca de QUALIFICAÇÃO: EMERSON CARNEIRO DA SILVA
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.DISCENTE : EMERSON CARNEIRO DA SILVA
DATA : 10/07/2018
HORA: 09:45
LOCAL: Sala de aula do Química 1
TÍTULO:
RECOVERY OF METALS IN PRINTED CIRCUIT BOARDS
PALAVRAS-CHAVES:
Printed circuit board, metals, electronic waste.
PÁGINAS: 69
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Inorgânica
ESPECIALIDADE: Físico Química Inorgânica
RESUMO:
The growth and technological upgrades, which occur uncontrollably each day, lead to an increase in the production and consumption of new electro/electronic devices, as a consequence, the growth of waste produced by the disposal of such equipment (e-waste). Disposal of this waste may pose a great risk to the environment because it contains toxic chemicals. The development of techniques for the recovery of metals present in electronic waste is of extreme importance, aiming at the economic power generated and also the decrease in environmental impacts. The highest concentration of the metals present in the electronic equipment are found in the PCBs, with this, the accomplishment of this work has as objective the separation, identification and recovery of the metals present in printed circuit boards of obsolete computers, where starting from alkaline leaching (NaOH 2M) and acid (HCl and HNO3) the metals were oxidized, separated into three different solutions (hydroxides, chlorides and metal nitrates) and characterized by inductive plasma coupled emission spectrometry (ICP). From the three solutions, different methods were applied to recover the metals: with the dehydration of the metal hydroxide solution being possible to observe the formation of the aluminum oxide, the electro-obtaining was able to recover copper, tin and lead with satisfactory percentages of solution of metallic chlorides and the reaction of the solution of metallic nitrates with NH4OH, generating the formation of the complex ion, nitrate of tetramincobre (II). The solid materials obtained are analyzed by X-ray fluorescence.
MEMBROS DA BANCA:
Presidente - 350633 - ADEMIR OLIVEIRA DA SILVA
Interno - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Externo ao Programa - 3149615 - HENRIQUE EDUARDO BEZERRA DA SILVA