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Effect of reactive media composition and co-contaminants on sulfur-based autotrophic denitrification

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Authors
Moon, Hee Sun; Chang, Sun Woo; Nam, Kyoungphile; Choe, Jaewan; Kim, Jae Young
Issue Date
2006-12
Publisher
Elsevier
Citation
Environmental Pollution 144, 802-807
Keywords
Autotrophic denitrificationSulfur granule sizeTCEHeavy metalsVolume ratio of sulfur to limestone
Abstract
As a part of a study developing a biological reactive barrier system to treat nitrate-contaminated groundwater, the effects of reactive media composition and co-contaminants on sulfur-oxidizing autotrophic denitrification were investigated. The size of sulfur granules affected the denitrification rates; kinetic constants of 2.883, 2.949, and 0.677 mg-N-1/2/L-1/2/day were obtained when the granule sizes were below 2 mm, between 2 and 5 mm, and over 5 turn, respectively. When the volume ratios of sulfur to limestone were 1:1, 2:1, 3:1, and 4:1, kinetic constants of 5.490, 3.903, 4.072, and 2.984 mg-N-1/2/L-1/2/day were obtained, respectively. The presence of TCE up to 20 mg/L didn't significantly affect nitrate removal efficiency. At the TCE concentration of 80 mg/L, however, nitrate removal was markedly inhibited. Also, Zn and Cu inhibited the denitrification activity at more than 0.5 mg/L of concentration whereas Cr (VI) did not significantly affect the nitrate removal efficiency at all levels tested. (c) 2006 Elsevier Ltd. All rights reserved.
ISSN
0269-7491
Language
English
URI
http://hdl.handle.net/10371/8766
DOI
https://doi.org/10.1016/j.envpol.2006.02.020
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Civil & Environmental Engineering (건설환경공학부)Journal Papers (저널논문_건설환경공학부)
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