In this review, resources of nickel and status of different processes/technologies in vogue or
being developed for extraction of nickel and associated metals from both primary and …

Chemical and biological leaching is practiced on a commercial scale for the mining of
metals from ores. Although bioleaching is an environmentally-friendly alternative to chemical …

With the alarming rate of e-waste generation, resource recovery from secondary metal
sources is essential for sustainable resource utilization and to prevent the release of …

The widespread use of selective catalytic reduction (SCR) catalysts will provide many waste
SCR catalysts. These spent catalysts can be identified as hazardous solid waste because …

Bioleaching is recognized as a green process for the extraction of metals from various solid
wastes. In the recovery of metals from spent catalyst using bioleaching with acidophilic …

The vital functions of extracellular polymeric substances (EPS) have been well recognized in
bioleaching of sulfide ores. However, no report is available about the role of EPS in …

We compared chemical and microbial leaching for multi-metal extraction from printed circuit
boards (PCBs) and tantalum capacitor scrap. A mixed consortium of acidophiles and …

Abstract Electroplating sludge by CaO/Ca (OH) 2 precipitation craft represents a typical toxic
heavy metals-bearing hazardous waste worldwide. Recently, sulfide electroplating sludge is …

Bioleaching of spent catalyst using acidophiles usually leads to lower Mo extraction than
other metals. To address this problem, Mo leaching has been examined using alkaline …

Currently, roasting-leaching is the main treatment process of spent hydrodesulfurization
(HDS) catalyst, but it will produce impurities, such as nickel molybdate and cobalt molybdate …