1Shenyang University of Chemical Technology, College of Information Engineering, Shenyang, China
2Shenyang University of Chemical Technology, College of Environment and Safety Engineering, Shenyang, China
3Liaoning ERay Environmental Technology Engineering Co. Ltd, Fushun, China
4University of Chemical Technology and Metallurgy, Sofia, Bulgaria
Submission date: 2016-05-10
Final revision date: 2016-07-12
Acceptance date: 2016-07-13
Publication date: 2016-11-24
Pol. J. Environ. Stud. 2016;25(6):2359–2356