Przemysl Chemiczny, Vol.92, No.5, 682-684, 2013
Use of potassium permanganate oxidation for pre-treatment of flowback water from the hydraulic fracturing of shale gas wellbore
Flowback water from shale gas recovery was alkalized to pH 6.5 by addn. of NaOH and oxidized with KMnO4. The most effective dose of oxidant was 0.36-0.42 kg/m(3) when the Fe2+ and Mn2+ ions were removed down to concn. 0.1-0.4 mg/L after filtration of the ppts. The org. substance was not removed during the oxidn.