Electronics Manufacturing Training

Technical Articles From Semyung University

Read technical articles about electronics manufacturing added by Semyung University

1 technical article added by Semyung University

Company Information:

Semyung University

Semyung University educates students to make the world a brighter place. Because it means to cultivate human beings that become the light in the world and to make humanity greatly beneficial, It is a concept that encompasses ...

Chungcheongbuk-do, South Korea


  • Phone +82-043-645-1125

Semyung University website

Company Postings:

(1) technical library article

Characteristics of Metals Leached from Waste Printed Circuit Boards Using Acidithiobacillus ferrooxidans

Jun 07, 2021 | Jinsung An

The aim of this study was to compare leaching characteristics of metals from printed circuit boards (PCBs), taken from waste electrical and electronic equipment in the presence and in the absence of the iron-oxidizing bacteria, Acidithiobacillus ferrooxidans. A. ferrooxidans not only increases the leached concentration of Cu from the PCBs, but also inhibits the components of the 0K medium and leached Cu from forming precipitates such as libethenite (Cu2(PO4)(OH)), thereby assisting Cu recovery from the PCBs. In addition, the leached concentration of Pb from PCBs decreased in the presence of A. ferrooxidans, due to Pb forming amorphous precipitates. It is expected that Pb is not highly toxic to A. ferrooxidans. Consequently, A. ferrooxidans can be used as a cost-effective and environmentally friendly way to leach out valuable metals from PCBs as low-grade urban ore....

SMT Reflow Soldering Equipment Company of the Year 2020!

MSD Dry Cabinets