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Optimal electronic waste combination for maximal recovery of Cu-Ni-Fe by acidithiobacillus ferrooxidans
, Article Journal of Cleaner Production ; Volume 240 , 2019 ; 09596526 (ISSN) ; Yaghmaei, S ; Mousavi, M ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
E-waste has become one of the greatest sources of environmental pollution. Bioleaching is known as a new, simple, and environmentally friendly technology for metal recovery requiring low energy input, unskilled labor operations, moderate conditions, and low costs. Acidithiobacillus ferrooxidans is a famous and puissant mesophilic bacterium applied extensively to recover metals from ores and different industrial and municipal wastes. It is necessary to identify the parameters affecting consumers E-waste recycling. Separating and recovering different types of E-waste is impossible for small recycling units. There should be a specific combination of E-waste, enabling the extraction of the...
Study of plastics elimination in bioleaching of electronic waste using Acidithiobacillus ferrooxidans
, Article International Journal of Environmental Science and Technology ; Volume 16, Issue 11 , 2019 , Pages 7113-7126 ; 17351472 (ISSN) ; Yaghmaei, S ; Mousavi, S. M ; Sharif University of Technology
Center for Environmental and Energy Research and Studies
2019
Abstract
Polystyrene, acrylonitrile butadiene styrene, and polypropylene are the main polymers in E-waste, existing about 31%, 16%, and 13%, respectively. In this research, the effects of the elimination of low-density materials (such as polymers and plastics) were studied using the shaking table method. Bioleaching of Cu and Ni against the original sample (Sample #1) and pre-treated sample without low-density materials (Sample #2) was compared. The amount of bioleached metals and growth characteristics (including pH, Eh, bacterial count) was investigated within 25 days. The analysis of Sample #1 showed that at pulp density of 15 g/l, 94% and 79% of Cu and Ni were recovered maximally, respectively,...