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Tytuł:
The Effect of Specific Conditions on Cu, Ni, Zn and Al Recovery from PCBS Waste Using Acidophilic Bacterial Strains
Autorzy:
Mrážiková, A.
Kaduková, J.
Marcinčáková, R.
Velgosová, O.
Willner, J.
Fornalczyk, A.
Saternus, M.
Powiązania:
https://bibliotekanauki.pl/articles/353402.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bioleaching
metals
electronic waste
PCBs
Opis:
The objective of this work was to evaluate the influence of static, stirring and shaking conditions on copper, zinc, nickel and aluminium dissolution from printed circuit boards (PCBs) using the mixed acidophilic bacterial culture of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans. The results revealed that static conditions were the most effective in zinc and aluminium dissolution. Zinc was removed almost completely under static conditions, whereas maximum of nickel dissolution was reached under the stirring conditions. The highest copper recovery (36%) was reached under stirring conditions. The shaking conditions appeared to be the least suitable. The relative importance of these systems for the bioleaching of copper and nickel decreased in the order: stirring, static conditions, shaking.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 261-264
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorbents from Mangifera indica L. Peel for the Recovery of Gold from Electronic Waste
Autorzy:
Ortinero, Cesar V.
Meim, Hannah N.
Paragas, Danila S.
Powiązania:
https://bibliotekanauki.pl/articles/2086407.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
biosorbent
agricultural waste
electronic waste
mango peel
Opis:
Mango (Mangifera indica L.) peel, a food processing waste, is rich in polyphenols and polysaccharides, two substances that have previously been linked in the selective recovery of gold from metals solution. This study was carried out to develop biosorbents from green and ripe mango peel for the retrieval of gold from electronic waste (e-waste). Biosorbents were produced by cross-linking the components of mango peel through acid treatment. The gold from the mixture of metals leached from the e-waste was recovered using the cross-linked and untreated mango peel. Fourier transform infrared (FTIR) spectroscopy was employed to confirm cross-linking and to monitor the adsorption of gold. Scanning electron microscopy (SEM) was performed to characterize the surface of the biosorbents. Incineration was conducted to separate gold from the biosorbent. The results of the FTIR analysis revealed an increase in the intensity of the peak for C=O and the appearance of the signal for C-O-C, suggesting cross-linking. The FTIR spectra of the untreated and cross-linked biosorbents also showed more intense peak for C=O, which may be due to the oxidation of OH groups as gold ions are reduced. The SEM revealed increase in the roughness of the surface of the biosorbents, presumably as the result of gold deposition. Although all biosorbents were able to capture gold from the leachate, the cross-linked green mango peel appeared to be the most effective.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 102--108
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Acidithiobacillus ferrooxidans for recovering metals from electronic waste dust
Autorzy:
Blazek, V.
Zavada, J.
Kucerova, R.
Nadkanska, H.
Powiązania:
https://bibliotekanauki.pl/articles/110012.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bacterial leaching
Acidithiobacillus ferrooxidans
electronic waste
Opis:
The paper discusses metal recovery from metallic wastes by means of pure chemical and biological leaching in an acidic medium. The research tested whether it is possible to remove Cu, Al, Sn and Ag from the dust formed during processing of electronic waste by means of Acidithiobacillus ferrooxidans. A laboratory flow bioreactor was designed and assembled for the purpose of the experiments. The experiments confirmed the effect of the bacteria on the dissolution of Cu, Al, and Sn, as well as different efficiency levels depending on the type of the leached material. The experimental results confirmed the positive effect of the presence of Acidithiobacillus ferrooxidans bacteria on the recovery of Cu, Al and mainly Sn into the leaching solutions from the leached dust.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 249-257
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of PID Control Parameters of Plasmatron Plasma Reactor
Autorzy:
Szałatkiewicz, J.
Szewczyk, R.
Budny, E.
Missala, T.
Winiarski, W.
Powiązania:
https://bibliotekanauki.pl/articles/972909.pdf
Data publikacji:
2012
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
PID
recycling
electronic waste utilization
plasma technology
Opis:
The paper presents determination of PID controller parameters for application of plasmatron powered plasma reactor designed and build in Industrial Research Institute for Automation and Measurements. Plasma reactor is the key element of the test setup, designed to research, processing and recovery of metals from waste of electric and electronic equipment, focusing on electronic printed circuit boards. Experiment was carried out with power of 36 kW. In experiment two temperatures were measured in two points of the reactor chamber, allowing verification of thermal response. Basing on identification of thermal parameters of the plasma reactor carried out in previous paper [7], the PID controller was chosen, as suitable to control second order inertia object. Parameters of used PID controlled were determined using MATLAB-Simulink toolbox. Calculated PID model was utilized for plasma reactor parameters control, allowing examination of energy saving by reducing of plasmatrons power, and stabilization of process parameters.
Źródło:
Journal of Applied Computer Science Methods; 2012, 4 No. 2; 31-39
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of Oxidizing Agents in Leaching Process of Electronic Waste
Autorzy:
Lisińska, M.
Saternus, M.
Willner, J.
Fornalczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/352176.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ozone
leaching process
electronic waste
metals recovery
Opis:
New technologies and the globalization of the electrical and electronic equipment market cause a continuous increase in the amount of electrical and electronic waste. They constitute one of the waste groups that grows the fastest in quantity. The development of the new generation of electrical and electronic devices is much faster than before. Recently attention has been concentrated on hydrometallurgical methods for the recovery of metals from electronic waste. In this article the role of an oxidizing agent, mainly ozone and hydrogen peroxide was presented in hydrometallurgical processes. Leaching process of printed circuits boards (PCBs) from used cell phones was conducted. The experiments were carried out in the presence of sulfuric acid and ozone as an oxidizing agent for various temperatures, acid concentration, ozone concentration. As a result, the concentrations of copper, zinc, iron and aluminum in the obtained solution were measured. The obtained results were compared to results obtained earlier in the presence of hydrogen peroxide as an oxidizing agent and discussed.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 969-974
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problems of Processing and Separation of Multi-Material Electronic Waste in Terms of Circular Economy
Autorzy:
Lisińska, M.
Fornalczyk, A.
Willner, J.
Powiązania:
https://bibliotekanauki.pl/articles/356622.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electronic waste
mobile phone
metals recovery
circular economy
Opis:
The article presents current methods used for the recovery of metals from used electronic equipment. The analysis of the composition and structure of the material was made on the example of one of the most popular and widespread e-waste - used cell phones. The article was address the problems of processing and separation of individual components included in these heterogeneous wastes. The main purpose of the conducted research was to prepare the tested material in such a way that the recovery of metalsin the further stages of its processing was as effective as possible. The results of attempts to separate individual material fractions with magnetic, pyrometallurgical or hydrometallurgical methods will be presented. An analysis of the possibilities of managing electronic waste in terms of the circular economy will be made.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1639-1643
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acidic leaching of steam gasified, pyrolyzed and incinerated PCB waste from LCD screen
Autorzy:
Szczepaniak, Włodzimierz
Zabłocka-Malicka, Monika
Gurgul, Agnieszka
Ochromowicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1450359.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electronic waste
recycling
metals
thermal treatment
acidic leaching
Opis:
In the recycling of WEEE, two approaches are common: a pyrometallurgical or hydrometallurgical treatment, preceded by a mechanical and/or physical separation. In this study, twostep processing of unmodified waste samples of LCD screen inverters was investigated: hightemperature processing followed by acidic leaching under fixed conditions (1M H2SO4, 90 ℃, 1 bar). The analysis carried out concerned a correlation between the type of HT treatment (pyrolysis, incineration, or gasification) and the dynamics of metals’ leaching from samples pretreated this way. It was found that HT method can act as “thermal disintegration”, since it affects, to a varying degree, the structure of the samples and cause elimination of organics and carbonaceous residue (incineration/gasification). The greatest mass loss (~18%) and the most loosened structure was observed for the gasified sample. Varying oxygen potential in HT-processes correlates well with the leachability of thermally treated inverters. The incineration was found to be the most favorable for copper extraction (>95%) by acidic leaching due to oxidized form of Cu, whereas Cu leaching from pyrolyzed and gasified samples needed oxygen and was controlled by the oxygen supply achieving only 36/43% after 6 h. The course of Pd leaching was similar to copper, although with lower efficiencies; 47% of palladium was extracted from the incinerated sample, and only 4 or 7% from gasified and pyrolyzed samples, respectively. Au was leached immediately but only to a slight extent. Contrary to Pb, leaching of Zn, Sn, Sb, and Ni was gradual, probably due to the formation of alloys with copper.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 257-268
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative smelting of thermally pretreated electronic waste
Autorzy:
Szczepaniak, Włodzimierz
Zabłocka-Malicka, Monika
Gurgul, Agnieszka
Leśniewicz, Anna
Ochromowicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1845234.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electronic waste
precious metals
recycling
incineration
gasification
pyrolysis
smelting
Opis:
Used electronic inverters were processed thermally to eliminate organic matrix components through oxidative incineration (IN), oxidative steam gasification (SG), and pyrolysis (PY). Such prepared material was melted at 1250°C with sodium/calcium silicate waste glass under reductive and oxidative atmospheres. The highest Cu recovery in the form of a gravitationally separated metallic phase was found for oxidative smelting of the PY sample and reductive smelting of the IN sample. Recovery of precious metals was analyzed, taking Cu recovery as the reference. It was found that the recovery of Pd was better than copper recovery in each experiment, and the recovery of Au was only in the oxidative smelting of the SG sample and reductive smelting of the IN sample. Recovery of Ag and Cu was similar but only for the reductive smelting of the PY and SG samples. It was demonstrated that Cu, as well as Au, Ag, and Pd recovery, substantially depends on the transport of metals through the metal/slag interface.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 6; 55-70
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative smelting of thermally pretreated electronic waste
Autorzy:
Szczepaniak, Włodzimierz
Zabłocka-Malicka, Monika
Gurgul, Agnieszka
Leśniewicz, Anna
Ochromowicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2146859.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electronic waste
precious metals
recycling
incineration
gasification
pyrolysis
smelting
Opis:
Used electronic inverters were processed thermally to eliminate organic matrix components through oxidative incineration (IN), oxidative steam gasification (SG), and pyrolysis (PY). Such prepared material was melted at 1250°C with sodium/calcium silicate waste glass under reductive and oxidative atmospheres. The highest Cu recovery in the form of a gravitationally separated metallic phase was found for oxidative smelting of the PY sample and reductive smelting of the IN sample. Recovery of precious metals was analyzed, taking Cu recovery as the reference. It was found that the recovery of Pd was better than copper recovery in each experiment, and the recovery of Au was only in the oxidative smelting of the SG sample and reductive smelting of the IN sample. Recovery of Ag and Cu was similar but only for the reductive smelting of the PY and SG samples. It was demonstrated that Cu, as well as Au, Ag, and Pd recovery, substantially depends on the transport of metals through the metal/slag interface.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 6; 55--70
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local community e-waste awareness and behavior. Polish case study
Autorzy:
Pasiecznik, I.
Banaszkiewicz, K.
Syska, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/206946.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electronic waste
industrial waste disposal
waste management
odpady elektroniczne
odpady przemysłowe
utylizacja odpadów
Opis:
e-Waste awareness and behavior of local Polish community has been examined. Specifically, the issue of selective waste electrical and electronic equipment (WEEE) collection has been explored. The main objectives of the research was to evaluate an attitude of the individuals towards e-waste treatment and to recognize the causes of low efficiency of the current WEEE management. The research was conducted among the inhabitants of a small town in Poland. Collected data may be useful while preparing household WEEE management systems. Over 52% of respondents, each was a representative of one household, conducted selective electrical and electronic equipment waste collection. Unfortunately, 12% (mostly young people aged 16-25, 9%) admitted that they threw e-waste mixed with general municipal waste. Another 12% (aged 18-25) claimed that they had never disposed of WEEE. Nowadays, the technology is developing very fast and small electronic devices are frequently exchanged, so the above mentioned statement is unlikely to be true. The research survey confirmed that further costs should be borne on educational activities which will raise people's awareness concerning WEEE threats and motivate them to collect e-waste selectively. The improvement of the management system increasing the number of e-waste drop off points, is necessary as well.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 287-303
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of thermodynamics, mass exchange and heat transfer of plasmatron plasma reactor for recycling of used electric and electronic components
Autorzy:
Szałatkiewicz, J.
Budny, E.
Szewczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/246576.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
model
simulation
recycling
energy recovery
combustion
environmental protection
electric waste
electronic waste
Opis:
New technologies and systems require precise insight of theirs parameters, which are in some cases difficult to measure. One of technique for obtaining of such data is simulation and modelling of objects, processes and theirs parameters. Application of mathematical modelling for thermodynamics, mass exchange and heat transfer calculation is presented in this article. Mathematical model of the plasmatron plasma reactor was developed and allows simulation of reactor and process parameters including: heat release during combustion, heat transfer from combustion process and exhaust gases to the reactors walls, temperature calculation inside the chamber, surface film conductance by convection and radiation, heat carried out with fumes, and other. The model was implemented in OCTAVE software and it can be calculated for relatively short time on single PC computer. Model of plasmatron reactor chamber allows quantitative simulation of the phenomena occurring in the exanimated process. Moreover, model allows answering how to control the process, and identification of correlations with sensitivity analysis. The article presents results of modelling of key process parameters of the plasma reactor essential for developed process understanding and analysis. Calculations results are interesting and important for further technology development for example, change of heat carried with fumes, or surface film conductance, which are hard to measure. Developed model offers good accuracy of calculations and correlation to measurements on experimental setup, and allows further optimization, scaling and development.
Źródło:
Journal of KONES; 2016, 23, 2; 357-363
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ługowanie miedzi i cyny z odpadów elektronicznych za pomocą bakterii Acidithiobacillus ferrooxidans
Leaching of copper and tin from electronic waste using Acidithiobacillus ferrooxidans
Autorzy:
Blazek, V.
Zavada, J.
Bouchal, T.
Lebr, J.
Fecko, P.
Powiązania:
https://bibliotekanauki.pl/articles/318276.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
odpad elektroniczny
ługowanie bakteryjne
Acidithiobacillus ferrooxidans
electronic waste
leaching
bacterial leaching
Opis:
Określono efekt ługowania metali z odpadów elektronicznych przy użyciu bakterii Acidithiobacillus ferrooxidans w warunkach statycznych. Zbadano ługowanie miedzi i cyny z płytki drukowanej układu elektronicznego i porównano do ługowania chemicznego. Całkowita ilość usuniętych metali była nieco mniejsza we wszystkich przypadkach. Dodatek bakterii ulepszył proces ługowania miedzi, jednak porównywalne rezultaty otrzymano poprzez dodanie mineralnej pożywki nie zawierającej bakterii. Ługowanie cyny przebiegało w inny sposób, a obecność bakterii nie polepszyła wydajności procesu.
This contribution is focused on the leaching of metals from electronic waste using bacterium Acidithiobacillus ferrooxidans under static conditions. Leaching of copper and tin from circuit board using bacteria was verified and compared to chemical leaching. The overall amounts of leached metals were quite low in all variants. Addition of bacteria improved the leaching of copper; however comparable results were obtained by addition of the sole nutrient medium without bacteria. Leaching of the tin followed different pattern and was not improved by presence of bacteria.
Źródło:
Inżynieria Mineralna; 2012, R. 13, nr 1, 1; 1-7
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of a Rules-Based Recommendation System Implemented in Prolog for the Management of Electronic Waste from ICT
Autorzy:
Dallos Parra, David Leonardo
Carvajal Camargo, Maryury Julieth
Sánchez Céspedes, Juan Manuel
Powiązania:
https://bibliotekanauki.pl/articles/2027979.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
electronic waste
recycling
rule-based system
information and communication technologies
Prolog
Opis:
Electronic waste generated from Information and Communication Technologies (ICT) has become a global issue as this represents a negative impact on both environment and human health. Consequently, it is noticeably useful to develop tools to soften such impact. Therefore, this article presents a rules-based system implemented in Prolog aiming at guiding ICT devices users towards good practices on electronic waste management to diminish the negative impact. The methodologies employed include exploratory, descriptive, and experimental. Even though the system developed in Prolog was found to be deficient with user interface, it is also functional and efficient, including features like usability and maintainability. In conclusion, it was found that waste recollection systems may be useful for both environmental management processes in different countries and also positive business opportunities.
Źródło:
Journal of Ecological Engineering; 2021, 22, 11; 104-113
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Living Lab approach to community training for recycling. A workshop experience
Living Lab jako sposób kształcenia w zakresie recyklingu. Doświadczenia warsztatowe
Autorzy:
Ceylan, Salih
Arslan, Mehmet Emre
Powiązania:
https://bibliotekanauki.pl/articles/1835682.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Living Lab
sustainable society
waste management
electronic waste
społeczeństwo
zrównoważenie
gospodarka odpadami
odpady elektroniczne
Opis:
The subject of the article is Living Labs – innovative platforms for meetings and exchange of ideas between specialists and users in order to develop and implement improvements oriented towards the needs of the latter. These modifications may concern not only products and services, but also, for example, the urban living environment. Living Labs are among those enterprises that approach sustainable development in a social context. Living Labs' practical activities relate directly to the everyday problems of local communities, and in the search for solutions, the opinions and ideas of their members are taken into account, therefore these platforms are potentially an important place helping to shape sustainable societies. The aim of this study was to present the benefits of living laboratories. This was done on the basis of the case study of Başakşehir Living Lab, an organization that conducts research on the efficient use of natural resources and the improvement of the quality of life in one of the districts of Istanbul, the city with the highest population in Turkey. The publication focused on the presentation of a series of workshops entitled "From electronic waste to design", the purpose of which was to show the possibility of reusing electronic waste. From the methodological point of view, the article was prepared on the basis of the authors' own experience related to the organization and conducting of workshops and a review of the literature, on the basis of which the theoretical foundation for the undertaken practical activities was outlined. The article also discusses the results of surveys which were carried out at the end of the series of workshops, which showed that such projects have a significant impact on building and raising the pro-ecological awareness of participants.
Tematem artykułu są żyjące laboratoria (Living Labs) – innowacyjne platformy służące spotkaniom i wymianie myśli między specjalistami i użytkownikami w celu wypracowania i wdrożenia ulepszeń zorientowanych na potrzeby tych ostatnich. Wspomniane modyfikacje mogą dotyczyć nie tylko produktów i usług, ale też na przykład miejskiego środowiska życia. Living Labs należą do tych przedsięwzięć, które traktują zrównoważony rozwój w kontekście społecznym. Działania praktyczne Living Labs dotyczą bezpośrednio codziennych problemów lokalnych społeczności, a w poszukiwaniu rozwiązań bierze się pod uwagę opinie i pomysły ich członków, dlatego platformy te są potencjalnie ważnym miejscem wspomagającym kształtowanie zrównoważonych społeczeństw. Celem niniejszej pracy było przybliżenie korzyści płynących z istnienia żyjących laboratoriów. Uczyniono to na podstawie studium przypadku Başakşehir Living Lab – organizacji prowadzącej badania nad efektywnym wykorzystaniem zasobów naturalnych i poprawą jakości życia w jednej z dzielnic Stambułu, miasta z największą liczbą mieszkańców w Turcji. W publikacji skupiono się na przedstawieniu serii warsztatów zatytułowanych: „Od odpadów elektronicznych do projektu”, których celem było pokazanie możliwości ponownego użycia odpadów elektronicznych. Od strony metodologicznej artykuł przygotowano w oparciu o własne doświadczenia związane z organizacją i prowadzeniem warsztatów oraz przegląd literatury, na podstawie której nakreślono teoretyczną podbudowę do podjętych działań praktycznych. W artykule omówiono też wyniki ankiet przeprowadzonych na zakończenie cyklu wspomnianych warsztatów, które wskazały, że takie przedsięwzięcia mają znaczący wpływ na budowanie i podnoszenie proekologicznej świadomości uczestników.
Źródło:
Architectus; 2021, Nr 2 (66); 77-88
1429-7507
2084-5227
Pojawia się w:
Architectus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study On The Electro-Refining Of Tin In Acid Solution From Electronic Waste
Badanie elektrorafinacji cyny w roztworze kwasu z e-odpadów
Autorzy:
Son, S. H.
Park, S. C.
Kim, J. H.
Kim, Y. H.
Lee, M. S.
Ahn, J.-W.
Powiązania:
https://bibliotekanauki.pl/articles/352665.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrorefining
tin
electronic waste
recycling
high purity
elektrorafinacja
cyna
odpady elektroniczne
recykling
Opis:
The tin metal could be retractable from wasted tin scrap, sludge, and wasted electroplated solution hydrometallurgical treatment, and purification process. In order to be used as resource of electronic devices, the retracted crude metal should be purified to the extent of higher than 99.9%. In this study, tin electro-refining process was performed to purify the casted tin crude metal at various experimental conditions: at the current density of 3, 5A/dm2, and in various electrolytes such as hydrochloric acid, sulfuric acid and methansulfonic acid. Additional experiment was conducted using Rotating Disk Electrode (RDE) in order to investigate the rate determining step of tin electro-refining process. The current efficiency, 65.6%, was achievable at the condition of current density, 5A/dm2, and in the electrolyte of Hydrochloric acid. During tin electro-refining process, impurity dissolved from tin crude metal into the electrolyte was analyzed using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES), and the result showed the concentration of impurity metal gradually increased. Quantitative analysis on casted tin crude metal showed that it consists of tin with 93.9 wt.% and several impurity metals of Ag, Bi, Pb, Cu, and etc. After tin electro-refining process, the purity of tin increased up to 99.985 wt.%.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1217-1220
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 39

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