Total control of chromium in tanneries – thermal decomposition of filtration cake from enzymatic hydrolysis of chrome shavings

Kocurek, Pavel; Kolomazník, Karel; Bařinová, Michaela; Hendrych, Jiří

dc.title	Total control of chromium in tanneries – thermal decomposition of filtration cake from enzymatic hydrolysis of chrome shavings	en
dc.contributor.author	Kocurek, Pavel
dc.contributor.author	Kolomazník, Karel
dc.contributor.author	Bařinová, Michaela
dc.contributor.author	Hendrych, Jiří
dc.relation.ispartof	Waste Management and Research
dc.identifier.issn	0734-242X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued	2017
utb.relation.volume	35
utb.relation.issue	4
dc.citation.spage	444
dc.citation.epage	449
dc.type	article
dc.language.iso	en
dc.publisher	SAGE Publications Ltd.
dc.identifier.doi	10.1177/0734242X16680728
dc.relation.uri	http://journals.sagepub.com/doi/abs/10.1177/0734242X16680728
dc.subject	alkaline enzymatic hydrolysis	en
dc.subject	chrome shavings	en
dc.subject	chromium filtration cake	en
dc.subject	chromium recycling	en
dc.subject	Leather waste	en
dc.subject	thermal decomposition	en
dc.description.abstract	This paper deals with the problem of chromium recovery from chrome-tanned waste and thus with reducing the environmental impact of the leather industry. Chrome-tanned waste was transformed by alkaline enzymatic hydrolysis promoted by magnesium oxide into practically chromium-free, commercially applicable collagen hydrolysate and filtration cake containing a high portion of chromium. The crude and magnesium-deprived chromium cakes were subjected to a process of thermal decomposition at 650°C under oxygen-free conditions to reduce the amount of this waste and to study the effect of magnesium removal on the resulting products. Oxygen-free conditions were applied in order to prevent the oxidation of trivalent chromium into the hazardous hexavalent form. Thermal decomposition products from both crude and magnesium-deprived chrome cakes were characterized by high chromium content over 50%, which occurred as eskolaite (Cr2O3) and magnesiochromite (MgCr2O4) crystal phases, respectively. Thermal decomposition decreased the amount of chrome cake dry feed by 90%. Based on the performed experiments, a scheme for the total control of chromium in the leather industry was designed. © 2016, © The Author(s) 2016.	en
utb.faculty	Faculty of Applied Informatics
dc.identifier.uri	http://hdl.handle.net/10563/1007362
utb.identifier.obdid	43876472
utb.identifier.scopus	2-s2.0-85018982946
utb.identifier.wok	000400132700012
utb.identifier.pubmed	27932548
utb.identifier.coden	WMARD
utb.source	j-scopus
dc.date.accessioned	2017-09-08T12:14:45Z
dc.date.available	2017-09-08T12:14:45Z
dc.description.sponsorship	Ministry of Education of the Czech Republic [MSMT-7778/2014]; European Regional Development Fund under the Project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; [MSM6046137308]
utb.contributor.internalauthor	Kocurek, Pavel
utb.contributor.internalauthor	Kolomazník, Karel
utb.contributor.internalauthor	Bařinová, Michaela
utb.fulltext.affiliation	P Kocurek1, K Kolomazník1, M Bařinová1 and J Hendrych2 1 Department of Automation and Control Engineering, Faculty of Applied Informatics, Tomas Bata University in Zlín, Nad Stráněmi 4511, 76005 Zlín, Czech Republic 2 Department of Environmental Chemistry, Faculty of Environmental Technology, University of Chemistry and Technology, Prague, Technická 5, 16628, Prague 6, Czech Republic Corresponding author: P Kocurek, Tomas Bata University in Zlín, Faculty of Applied Informatics, Department of Automation and Control Engineering, Nad Stráněmi 4511, 76005, Zlín, Czech Republic. Email: [email protected]
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utb.fulltext.sponsorship	The authors disclosed receipt of the following financial support for the research, authorship and/or publication of this article: The work was performed with financial support of research project NPU I No. MSMT-7778/2014 by the Ministry of Education of the Czech Republic and also by the European Regional Development Fund under the Project CEBIA-Tech No. CZ.1.05/2.1.00/03.0089. This work was also supported by grant No. MSM6046137308.