Removing Phenols from Post-Processing Wastewater Originating from Underground Coal Gasification Using Coagulation-Flocculation and the H2O2/UV Process
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Chemiqua Company, Kraków, Poland
Central Mining Institute, Department of Water Protection, Katowice, Poland
AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Kraków, Poland
Submission date: 2017-06-27
Final revision date: 2017-12-08
Acceptance date: 2017-12-17
Online publication date: 2018-06-25
Publication date: 2018-07-09
Corresponding author
Dariusz Zdebik   

Główny Instytut Górnictwa, Pl. Gwarków 1, 40-166 Katowice, Poland
Pol. J. Environ. Stud. 2018;27(6):2757-2763
Our paper presents the possibility of phenol removal from post-processing wastewater originating from an experimental simulation of the underground coal gasification process carried out in the Barbara Experimental Mine in Mikołów, Poland. The application of initial coagulation-flocculation processes with iron(II), iron(III), aluminium, titanium(IV), and zirconium(IV) and anionic flocculant has allowed phenols removal from 7.9% (pH 8, Zr4+ 400 mg/L) to 22.2% (for pH 8, Fe2+ 800 and 1,000 mg/L and for pH 8, Fe3+ 1,000 mg/L). The application of the coagulation-flocculation process and advanced oxidation in the H2O2/UV system resulted in a total reduction of phenolic concentrations in the treated wastewater by about 93% due to their reaction with OH• radicals, resulting from the UV rays impact on H2O2.
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