Proceedings of the 18th Symposium on Environmental Issues and Waste Management in Energy and Mineral Production SWEMP 2018-Selected Works - Widzyk-Capehart, Eleonora; Widzyk-Capehart, Eleonora; Hekmat, Asieh; Hekmat, Asieh; Singhal, Raj; Singhal, Raj (Springer International Publishing : Imprint: Springer, 2019)