Waste electric and electronic equipment, or electronic waste, has been taken into
consideration not only by the government but also by the public due to their hazardous …

The disposal of hazardous waste of any form has become a great concern for the industrial
sector due to increased environmental awareness. The increase in usage of …

Owing to industrial evolution, a huge mass of toxic metals, including Co, Cu, Cr, Mn, Ni, Pb,
and Zn, and metalloids, such as As and Sb, has inevitably been released into the natural …

Microbiological processes were applied to mobilize metals from electronic waste materials.
Bacteria (Thiobacillus thiooxidans, T. ferrooxidans) and fungi (Aspergillus niger, Penicillium …

During the treatment of sewage, a huge volume of sludge is generated, which is disposed of
on land as soil fertilizer/conditioner due to the presence of nitrogen, phosphorus, potassium …

The increasing demand of different essential metals as a consequence of the development
of new technologies, especially in the so called “low carbon technologies” require the …

Due to rapid industrialization the demand for heavy metals is ever increasing, but the
reserves of high-grade ores are diminishing. Therefore there is a need to explore alternative …

Large quantities of solid catalysts are routinely used in many chemical industries especially
in petroleum refining and petrochemical industries. Solid catalysts contain metals, metal …

Petroleum refineries must pay attention to spent hydroprocessing catalysts particularly since
they are hazardous toxic wastes. This review focuses on the progress in metal reclamation …

Fly ash from a municipal solid waste (MSW) incinerator in Singapore was physically and
chemically characterized. The very fine amorphous ash particle was found to have a non …