Title:
Various Metal Tolerance of Acidophilic Aspergillus turcosus for Probable Using in PCBs Bioleaching Process
Author(s):
Maluleem, P., Sueasaming, S., Jareonying, S., Assavasirijinda, N.
Document(s):
Paper
Poster
Abstract:
In the current era, there exists a widespread and rapid progression in the economy, technology, and industry, leading to the generation of vast amounts of abandoned e-waste especially printed circuit boards (PCBs) which pollute and contaminate the environment. Three Aspergillus sp. YGS1, YGD1, and YGD2 strains were isolated from electronic waste disposal sites and were shown the highest copper sulfate tolerance at a concentration of 1,000 mM. However, the fungi that are probably used in the bioleaching process should be tolerant to various metal ions. This research investigated their growth patterns under varying eight heavy metal compounds with concentrations of 0.1-15% w/v. The results revealed that adding aluminum oxide and ferric oxide did not affect fungal growth. However, increased concentrations of zinc oxide, zinc sulfate, lithium sulfate, or manganese (II) sulfate resulted in reduced fungal growth. Notably, a trace of mercury (II) sulfate and selenium dioxide can inhibit fungal growth. A clear zone and pigment formations beneath the colonies were observed when cultured on heavy metal exposure conditions. Additionally, the three fungi were belonging to Aspergillus turcosus. This study firstly reports the several metal tolerance abilities of Acidophilic Aspergillus turcosus which can be applied for PCBs bioleaching process.
Keywords:
biodegradability, heavy metals, waste, printed circuit boards (PCBs), acidophilic fungi
Topic:
Sustainable Resources for Decarbonising the Economy
Subtopic:
Municipal and industrial wastes
Event:
32nd European Biomass Conference and Exhibition
Session:
1DV.1.14
Pages:
124 - 128
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-1DV.1.14
Price:
FREE
