Chemometric Study of the Ex Situ Underground Coal Gasification Wastewater Experimental Data

Abstract The main goal of the study was the analysis of the parameters of wastewater generated during the ex situ underground coal gasification (UCG) experi-ments on lignite from Belchatow, and hard coal from Ziemowit and Bobrek coal mines, simulated in the ex situ reactor. The UCG wastewater may pose a poten-tial threat to the groundwater since it contains high concentrations of inorganic (i.e., ammonia nitrogen, nitrites, chlorides, free and bound cyanides, sulfate