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IS4SI SUMMIT Berkeley 2019
Proceeding Paper

A Step by Step Investigation of Cr(III) Recovery from Tannery Waste †

Laboratory of Chemical & Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Presented at the 4th International Electronic Conference on Water Sciences, 13–29 November 2019; Available online: https://ecws-4.sciforum.net/.
Proceedings 2020, 48(1), 1; https://doi.org/10.3390/ECWS-4-06436
Published: 12 November 2019
(This article belongs to the Proceedings of The 4th International Electronic Conference on Water Sciences)
The effluent of tanneries is a hazardous waste and a combination of physical-chemical and biological techniques is required for its treatment. As a result of the previous processes, a sludge with high chromium content is produced. So, the aim of this study is the hydrometallurgical recovery of chromium in the context of a circular economy. According to chemical characterization, the only form of metal that existed in the sludge was the trivalent, while its content was up to 14.8% w/w. Among the examined acids, the highest efficiency in Cr(III) leaching was achieved by the H2SO4 (93%), due to the formation of the soluble CrSO4+. Regarding the step of precipitation, no significant varions were observed between the two alkaline medias that were tested, namely NaOH and Ca(OH)2.
Keywords: tannery sludge; chromium recovery; hydrometallurgy; circular economy tannery sludge; chromium recovery; hydrometallurgy; circular economy
MDPI and ACS Style

Kokkinos, E.; Zouboulis, A. A Step by Step Investigation of Cr(III) Recovery from Tannery Waste. Proceedings 2020, 48, 1. https://doi.org/10.3390/ECWS-4-06436

AMA Style

Kokkinos E, Zouboulis A. A Step by Step Investigation of Cr(III) Recovery from Tannery Waste. Proceedings. 2020; 48(1):1. https://doi.org/10.3390/ECWS-4-06436

Chicago/Turabian Style

Kokkinos, Evgenios, and Anastasios Zouboulis. 2020. "A Step by Step Investigation of Cr(III) Recovery from Tannery Waste" Proceedings 48, no. 1: 1. https://doi.org/10.3390/ECWS-4-06436

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