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Simultaneous valorization of polyvinyl chloride and eggshell wastes by a semi-industrial mechanochemical approach

Author:
Baláž, Matej, Bujňáková, Zdenka, Achimovičová, Marcela, Tešinský, Matej, Baláž, Peter
Source:
Environmental research 2019 v.170 pp. 332-336
ISSN:
0013-9351
Subject:
calcium chloride, chlorine, dechlorination, egg shell, mechanochemistry, milling, organochlorine compounds, poly(vinyl chloride), wastes
Abstract:
A semi-industrial approach for simultaneous treatment of eggshell and industrial polyvinyl chloride waste utilizing tools of ball milling is reported therein. On a hundred-gram scale, it is possible to transfer more than 55% of chlorine present in the polyvinyl chloride representing an environmental burden, into harmless soluble form. On a laboratory scale, a complete dechlorination was achieved. The ratio of eggshell-to-polyvinyl chloride plays a significant role for the effective dechlorination and the kinetics of semi-industrial process follows zero-order kinetics with the rate constant 1.23 × 10−5 s−1. Chlorine is mainly in the form of calcium chloride. This study is an example of efficient simultaneous valorization of two waste materials on a semi-industrial scale, as the products can be utilized again.
Agid:
6257473