Characterization of controlled-release KMnO4 (CRP) barrier system for groundwater remediation: a pilot-scale flow-tank study

Chemosphere
Eung Seok LeeHo Kyoung Kim

Abstract

Release and spreading of permanganate (MnO(4)(-)) in the well-based controlled-release potassium permanganate (KMnO(4)) barrier system (CRP system) was investigated by conducting column release tests, model simulations, soil oxidant demand (SOD) analyses, and pilot-scale flow-tank experiments. A large flow tank (L x W x D=8m x 4m x 3m) was constructed. Pilot-scale CRP pellets (OD x L=0.05 m x1.5m; n=110) were manufactured by mixing approximately 198 kg of KMnO(4) powders with paraffin wax and silica sands in cylindrical moulds. The CRP system (L x W x D=3m x 4m x 1.5m) comprising 110 delivery wells in three discrete barriers was constructed in the flow tank. Natural sands (organic carbon content=0.18%; SOD=3.7-11 g MnO(4)(-)kg(-1)) were used as porous media. Column release tests and model simulations indicated that the CRP system could continuously release MnO(4)(-) over several years, with slowly decreasing release rates of 2.5 kg d(-1) (day one), 109 g d(-1) (day 100), 58 g d(-1) (year one), 22 g d(-1) (year five), and 12 g d(-1) (year 10). Mean MnO(4)(-) concentrations within the CRP system ranged from 0.5 to 6 mg l(-1) during the 42 days of testing period. The continuously releasing MnO(4)(-) was gradually removed by SOD li...Continue Reading

References

Mar 1, 1970·Journal of Pharmaceutical Sciences·T J Roseman, W I Higuchi
Jul 28, 2001·Journal of Contaminant Hydrology·M H SchrothJ D Istok
Jul 2, 2003·Environmental Science & Technology·Eung Seok LeeFranklin W Schwartz
May 12, 2005·Environmental Science & Technology·Kevin G MumfordRichelle M Allen-King
Dec 5, 2006·Chemosphere·Eung Seok Lee, Franklin W Schwartz

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Citations

Jan 22, 2010·Environmental Technology·N C WooF W Schwartz
Nov 26, 2013·Journal of Contaminant Hydrology·Marc WaltherFrank W Schwartz
Dec 2, 2011·Chemosphere·Klara RusevovaAnett Georgi
Aug 11, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Houfeng XiongDonglei Zou

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