Extraction of chromium from tannery sewage sludge
Document Type
Letter to the Editor
Publication Date
2-9-2022
Department
Department of Materials Science and Engineering
Abstract
The leather industry produces a large amount of tannery sewage sludge every year, which is a dangerous solid waste, but also a secondary resource. In the present research, the extraction of chromium from the tannery sewage sludge was investigated through the process of blank roasting-sodium carbonate roasting-water leaching and the process of sulfuric acid curing-water leaching, respectively. The process of sulfuric acid curing-water leaching was characterised by high extraction of chromium, a simple process as well as low cost of mineral decomposition, which made it the better option. For the process of sulfuric acid curing-water leaching, the leaching of chromium reached up to 99.5% under the optimum conditions of sulfuric acid curing (raw tannery sewage sludge cured at room temperature for 5 min with 42 wt% sulfuric acid addition), followed by water leached at 100°C for 30 min with a liquid/solid ratio of 2 mL/g.
Publication Title
Canadian Metallurgical Quarterly
Recommended Citation
Hu, B.,
Zhang, C.,
Wang, H.,
Zhang, G.,
Li, Q.,
&
Wang, M.
(2022).
Extraction of chromium from tannery sewage sludge.
Canadian Metallurgical Quarterly.
http://doi.org/10.1080/00084433.2022.2034709
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/15738