Copper recovery from waste printed circuit boards and the correlation of Cu, Pb, Zn by ionic liquid

Szczegóły
Opis

Tytuł:: Copper recovery from waste printed circuit boards and the correlation of Cu, Pb, Zn by ionic liquid
Autorzy:: Li, F.
Chen, M.
Powiązania:: https://bibliotekanauki.pl/articles/208289.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: electronic waste
printed circuit boards
heavy metals
waste disposal
metale ciężkie
odpady elektroniczne
odpad płytek drukowanych
miedź
Źródło:: Environment Protection Engineering; 2017, 43, 4; 55-66
0324-8828
Język:: angielski
Prawa:: Wszystkie prawa zastrzeżone. Swoboda użytkownika ograniczona do ustawowego zakresu dozwolonego użytku
Dostawca treści:: Biblioteka Nauki
: Artykuł

Przejdź do źródła

Waste printed circuit boards (WPCBs) contain not only harmful materials but also many valuable resources, especially metals, which attracts more and more attention from the public. In this study, a sulfonic acid functionalized ionic liquid ([BSO₃HPy]OTf) was used to recycle copper from WPCBs. Zinc and lead, represented as typical heavy metals, were chosen to study the leaching behavior and their relation to copper. Five factors such as particle size, ionic liquid (IL) concentration, H₂O dose, solid to IL ratio and temperature were investigated in detail. The results showed that copper leaching rate was high, up to 99.77%, and zinc leaching rate reached the highest value of 74.88% under the optimum conditions. Lead cannot be leached effectively and the leaching rate was mostly low than 10%, which indirectly indicated that [BSO₃HPy]OTf has a good selectivity to lead. Besides, the interaction of copper, lead and zinc was characterized macroscopically by means of statistical methods. The Spearman correlation analysis showed that copper and zinc had a highly positive correlation. Lead had little relation to copper, which to some extent indicated that the effect of zinc on copper leaching behavior was bigger than that of lead.

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