Bioleaching of metals from printed circuit boards supported with surfactant-producing bacteria
PBN-AR
Instytucja
Wydział Instalacji Budowlanych, Hydrotechniki i Inżynierii Środowiska (Politechnika Warszawska)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Journal of Hazardous Materials
ISSN
0304-3894
EISSN
Wydawca
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
203-210
Numer tomu
264
Identyfikator DOI
Liczba arkuszy
0.5
Autorzy
Pozostali autorzy
+ 3
Słowa kluczowe
angielski
Heavy metal
Bioleaching
Printed circuit boards
Biosurfactant producing bacteria
Streszczenia
Język
angielski
Treść
This study has evaluated the possibility of bioleaching zinc, copper, lead, nickel, cadmium and chromium from printed circuit boards by applying a culture of sulphur-oxidising bacteria and a mixed culture of biosurfactant-producing bacteria and sulphur-oxidising bacteria. It was revealed that zinc was removed effectively both in a traditional solution acidified by a way of microbial oxidation of sulphur and when using a microbial culture containing sulphur-oxidising and biosurfactant-producing bacteria. The average process efficiency was 48% for Zn dissolution. Cadmium removal was similar in both media, with a highest metal release of 93%. For nickel and copper, a better effect was obtained in the acidic medium, with a process effectiveness of 48.5% and 53%, respectively. Chromium was the only metal that was removed more effectively in the bioleaching medium containing both sulphur-oxidising and biosurfactant-producing bacteria. Lead was removed from the printed circuit boards with very low effectiveness (below 0.5%). Aerating the culture medium with compressed air increased the release of all metals in the medium with sulphur and biosurfactant, and of Ni, Cu, Zn and Cr in the acidic medium. Increasing the temperature of the medium (to 37 °C) had a more significant impact in the acidic environment than in the neutral environment.
Inne
System-identifier
WUT397127
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