SHORT COMMUNICATION
Zinc Regarding the Utilization of Waste Tires by Pyrolysis
Anna Ilnicka1, Jarosław Okonski1, Aleksandra W. Cyganiuk1, Jaromir Patyk2, Jerzy P. Lukaszewicz1,2
 
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1Faculty of Chemistry, Nicolaus Copernicus University,
Gagarina 7, 87-100 Toruń, Poland
2Centre for Modern Interdisciplinary Technologies ICNT,
Wilenska 4, 87-100 Toruń, Poland
 
 
Submission date: 2015-04-25
 
 
Final revision date: 2016-03-05
 
 
Acceptance date: 2016-03-07
 
 
Publication date: 2016-11-24
 
 
Pol. J. Environ. Stud. 2016;25(6):2683-2687
 
KEYWORDS
TOPICS
ABSTRACT
The major goal of our study was to demonstrate how to eliminate zinc from the products of waste tire pyrolysis and avoid its environmental circulation. The new tire utilization manner consists of a separate combustion of the pyrolytic char containing 5.1 wt. % zinc and a collection of such obtained ash (10.4% yield) that contains 42 wt. % of zinc. The ash is a good candidate for metallurgical recovery of metallic zinc. The study demonstrates that pyrolytic char, because of its very low BET surface area of 43-60 m2/g, should not be transformed into activated carbon. High surface areas reported in literature (800-910 m2/g) for some pyrolytic chars were achieved after a complex and expensive activation process. Moreover, the study proved that zinc derivatives in tire-driven pyrolytic chars could be released to the environment since they were partly leached in H2O and etched in 0.1 M HCl solution. The study demonstrates that zinc can be eliminated from environmental circulation during tire pyrolysis and proposed an alternative solution to the transformation of pyrolytic char into activated carbon.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
 
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ISSN:1230-1485
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