Journal
JOURNAL OF CLEANER PRODUCTION
Volume 253, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.119925
Keywords
Gold recovery; Adsorption; Sericin and alginate particles; Proanthocyanidins; Chemical crosslink
Categories
Funding
- Sao Paulo Research Foundation/FAPESP [2017/18236-1]
Ask authors/readers for more resources
The recovery of gold from wastewater has been encouraged in the last years due to this metal high cost, elevated demand, and low availability. Sericin and alginate particles chemically crosslinked by proanthocyanidins (SAPAS) were successfully used in this study for this purpose. The maximum adsorption capacity predicted by the Dubinin-Radushkevich model was 237.60 mg/g at 303 K. The thermodynamic parameters revealed that the process is spontaneous, endothermic and also governed by entropic changes. The characterization of SAPAS before and after gold adsorption (SAPAS-Gold) suggested that the uptake of this metal involves ion exchange and subsequent reduction. The thermogravimetric analysis showed that elemental gold may be recovered from SAPAS surface by the incineration process. Alternatively, both the reuse of SAPAS and the efficient recovery of gold (84.389 +/- 2.103%) is possible by employing the desorption process with thiourea (0.5M)/hydrochloric acid (2M) solution. (C) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available