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Wyświetlanie 1-3 z 3
Tytuł:
Stan badań w Polsce nad wykorzystaniem mikroorganizmów do odzysku metali z rud i odpadów
State of knowledge in Poland on microorganisms application in metals recovery from ores and wastes
Autorzy:
Karwowska, E.
Łebkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1825991.pdf
Data publikacji:
2008
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
mikroorganizmy
biohydrometalurgia
ługowanie metali
bioługowanie
biosorpcja
Opis:
The paper presents information about the research works in Poland concerning microbiological processes of heavy metals bioleaching from ores, wastes and sewage sludge. Main scientific centers working on biohydrometallurgy, including Warsaw University, Silesian University and Wroclaw University of Technology were taken into account. The basic waste materials applied in biohydrometallurgical processes are lowgrade ores, post-flotation wastes, concentrates and sewage sludge. In Poland the experiments were carried out using copper ores and flotation wastes, arsenic concentrates, magnesite and arsenopyrite wastes, zinc and galena concentrates. The research work covered a bioleaching mechanisms observation, estimation of the process effectiveness as well as the determination of bacterial strains active in the bioleaching process. Some results of biohydrometallurgical studies of other research centers, (University of Opole, University of Warmia and Mazury and Warsaw University of Technology) were also presented. The advantages of biohydrometallurgical methods application, in comparison with conventional methods of metals recycling were pointed out. Recapitulating Polish achievements in the processes of biological regaining of metals from low-grade ores and waste, it should be affirmed, that works in this range, though valuable and carried out on the world level, they were not introduced in the industry. The majority of investigations concerned only laboratory tests in the small scale. They were carried out mainly on flotation wastes from copper mines in Lubin, Polkowice, Rudna and concentrates of galenit, zinc blende and chalcopiryte as well as on loellignite and arsenopyrite - arsenic waste containing gold, and also recently sludge from galvanization. Few investigations on removal of metal from sewage sludge (activated sludge and sludge after methane fermentation) were carried out. Combined biosorption of metals and bioleachinch - as the final stage of elimination of metals from sewage - was also applied in few cases. It seems necessary, so that Poland joins group of countries applying industrial biohydrometallurgical processes, particularly to recovery of copper and zinc and to removal of metals from wastes and sewage sludge
Źródło:
Rocznik Ochrona Środowiska; 2008, Tom 10; 433-442
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of additives on heavy metal immobilization during vitrification of tannery sewage sludge
Autorzy:
Bień, J.
Celary, P.
Morzyk, B.
Sobik-Szołtysek, J.
Wystalska, K.
Powiązania:
https://bibliotekanauki.pl/articles/208067.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
heavy metals
flotation
sewage sludge
vitrification
metal leaching
tannery sewages
metale ciężkie
flotacja
osady ściekowe
witryfikacja
odcieki
ługowanie metali
ścieki garbarskie
Opis:
The aim of this study was to evaluate the effect of additives such as waste moulding sands (WMS) and dolomite flotation waste (F) on heavy metal immobilization during vitrification of tannery sewage sludge. Sewage sludge with addition of waste moulding sands of 25-45 vol. % and flotation waste of 5-25 vol. % was used in the vitrification process. The study demonstrated a direct correlation between the WMS fraction in the vitrified formulations and heavy metal immobilization in the obtained vitrificates. Vitrification of sewage sludge with these additives resulted in obtaining vitreous products with reduced heavy metal leaching properties; the lowest content of heavy metals in the leachates was found in the vitrificates with the highest content of waste moulding sands.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 33-40
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extraction of metals from electronic waste by bacterial leaching
Autorzy:
Willner, J.
Fornalczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/208166.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
metal recovery
bioleaching
electronic scrap
electronic waste
Acidithiobacillus ferrooxidans
bacterial leaching
biohydrometallurgy
recovering metals
odzysk metali
bioługowanie
ługowanie bakteryjne
biohydrometalurgia
odzyskiwanie metali
złom elektroniczny
odpady elektroniczne
Opis:
Electronic waste is usually processed by means of classical methods, i.e. in pyro- and hydro-metallurgical processes. However, new solutions for more economically and ecologically efficient recovery of metals are constantly being searched for. Biohydrometallurgy can become a promising technology of recovering metals from industrial waste. Bioleaching - one of the methods applied in that technology - is the subject of particular interest of many scientific centres. The paper presents the results of laboratory tests of bacterial leaching of metals from electronic scrap. It describes the mechanisms of this process and the factors influencing the chemical reaction. The paper also presents preliminary results of experimental studies on the copper bioleaching from electronic waste with the participation of Acidithiobacillus ferrooxidans bacteria.
Źródło:
Environment Protection Engineering; 2013, 39, 1; 197-208
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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