Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology
2022
Преузимање 🢃
Аутори
Bugarčić, MladenJovanović, Gvozden
Petronijević, Nela
Marković, Branislav
Stopić, Srećko
Friedrich, Bernd
Sokić, Miroslav
Остала ауторства
Brajković, PetraMatošin, Ante
Mužek, Mario Nikola
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Recent mankind demand for electronic devices is in constant upgrowth, those devices
always contain printed circuit boards (PCB) which are mainly constructed of plastics, semiconductors
and decent content of various metals. Hence, in the end-of-life of those
products, it is highly recommended to recover those materials or functionalize those waste
into other products or feed materials, in order to lessen their harmful impact on the
environment. One of the promising processing procedures is hydrometallurgical treatment,
since it is cost-effective and simple. In order to recover metals as aqueous soluble salts,
crushed and milled PCB is air-pyrolyzed and obtained powder is processed as start material
in leaching experiments. The use of concentrated aqua regia led to the passivation of solid
material and consequently impede the leaching process. Dry-digestion leaching using
concentrated sulfuric acid partially leached some metals. The highest leaching rate (≥70 %)
has been achie...ved using diluted sulfuric acid (for Al, Ni, Fe, Co, and rare-earth) and copper
yield was highest utilizing 2 M H2SO4 + 3 M H2O2; S/L = 0.1 g/ml. While sulfuric acid has
accomplished some results for enumerated leachates, it achieved limited success for
leaching Ba, Pb, Ag, Au, Pt and Pd. Overall findings imply that hydrometallurgical
procedures may be used but only together with previous separation techniques. That
approach would increase overall leaching with oxidizing agents and enable leaching of
noble metals.
Кључне речи:
PCB / recycling / acid leaching / metals recoveringИзвор:
3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION, 2022, 8-8Издавач:
- Split : University of Split, Faculty of Chemistry and Technology
Институција/група
Institut za tehnologiju nuklearnih i drugih mineralnih sirovinaTY - CONF AU - Bugarčić, Mladen AU - Jovanović, Gvozden AU - Petronijević, Nela AU - Marković, Branislav AU - Stopić, Srećko AU - Friedrich, Bernd AU - Sokić, Miroslav PY - 2022 UR - https://ritnms.itnms.ac.rs/handle/123456789/986 AB - Recent mankind demand for electronic devices is in constant upgrowth, those devices always contain printed circuit boards (PCB) which are mainly constructed of plastics, semiconductors and decent content of various metals. Hence, in the end-of-life of those products, it is highly recommended to recover those materials or functionalize those waste into other products or feed materials, in order to lessen their harmful impact on the environment. One of the promising processing procedures is hydrometallurgical treatment, since it is cost-effective and simple. In order to recover metals as aqueous soluble salts, crushed and milled PCB is air-pyrolyzed and obtained powder is processed as start material in leaching experiments. The use of concentrated aqua regia led to the passivation of solid material and consequently impede the leaching process. Dry-digestion leaching using concentrated sulfuric acid partially leached some metals. The highest leaching rate (≥70 %) has been achieved using diluted sulfuric acid (for Al, Ni, Fe, Co, and rare-earth) and copper yield was highest utilizing 2 M H2SO4 + 3 M H2O2; S/L = 0.1 g/ml. While sulfuric acid has accomplished some results for enumerated leachates, it achieved limited success for leaching Ba, Pb, Ag, Au, Pt and Pd. Overall findings imply that hydrometallurgical procedures may be used but only together with previous separation techniques. That approach would increase overall leaching with oxidizing agents and enable leaching of noble metals. PB - Split : University of Split, Faculty of Chemistry and Technology C3 - 3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION T1 - Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology EP - 8 SP - 8 ER -
@conference{ author = "Bugarčić, Mladen and Jovanović, Gvozden and Petronijević, Nela and Marković, Branislav and Stopić, Srećko and Friedrich, Bernd and Sokić, Miroslav", year = "2022", abstract = "Recent mankind demand for electronic devices is in constant upgrowth, those devices always contain printed circuit boards (PCB) which are mainly constructed of plastics, semiconductors and decent content of various metals. Hence, in the end-of-life of those products, it is highly recommended to recover those materials or functionalize those waste into other products or feed materials, in order to lessen their harmful impact on the environment. One of the promising processing procedures is hydrometallurgical treatment, since it is cost-effective and simple. In order to recover metals as aqueous soluble salts, crushed and milled PCB is air-pyrolyzed and obtained powder is processed as start material in leaching experiments. The use of concentrated aqua regia led to the passivation of solid material and consequently impede the leaching process. Dry-digestion leaching using concentrated sulfuric acid partially leached some metals. The highest leaching rate (≥70 %) has been achieved using diluted sulfuric acid (for Al, Ni, Fe, Co, and rare-earth) and copper yield was highest utilizing 2 M H2SO4 + 3 M H2O2; S/L = 0.1 g/ml. While sulfuric acid has accomplished some results for enumerated leachates, it achieved limited success for leaching Ba, Pb, Ag, Au, Pt and Pd. Overall findings imply that hydrometallurgical procedures may be used but only together with previous separation techniques. That approach would increase overall leaching with oxidizing agents and enable leaching of noble metals.", publisher = "Split : University of Split, Faculty of Chemistry and Technology", journal = "3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION", title = "Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology", pages = "8-8" }
Bugarčić, M., Jovanović, G., Petronijević, N., Marković, B., Stopić, S., Friedrich, B.,& Sokić, M.. (2022). Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology. in 3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION Split : University of Split, Faculty of Chemistry and Technology., 8-8.
Bugarčić M, Jovanović G, Petronijević N, Marković B, Stopić S, Friedrich B, Sokić M. Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology. in 3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION. 2022;:8-8..
Bugarčić, Mladen, Jovanović, Gvozden, Petronijević, Nela, Marković, Branislav, Stopić, Srećko, Friedrich, Bernd, Sokić, Miroslav, "Approach on recycling of printed circuit boards (PCB) via hydrometallurgical procedures: Principle and methodology" in 3rd International Convention of Scientists, Specialist Employees and Students on the Topic of Environmental Protection in the Republic of Croatia - 3rd ZORH CONVENTION (2022):8-8.