Reduction of perchlorate by salt tolerant bacterial consortia
- Authors
- Ryu, Hee Wook; Nor, Seong Jin; Moon, Kyung Eun; Cho, Kyung-Suk; Cha, Daniel K.; Rhee, Kang In
- Issue Date
- Jan-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Perchlorate-reducing bacteria; Salt tolerance; Uncompetitive inhibition
- Citation
- BIORESOURCE TECHNOLOGY, v.103, no.1, pp.279 - 285
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 103
- Number
- 1
- Start Page
- 279
- End Page
- 285
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/12517
- DOI
- 10.1016/j.biortech.2011.09.115
- ISSN
- 0960-8524
- Abstract
- Two perchlorate-reducing bacterial consortia (PRBC) were obtained by enrichment cultures from polluted marine sediments. Non-salt-tolerant PRBC (N-PRBC) was enriched without the addition of NaCl, and salt tolerant-PRBC (ST-PRBC) was enriched with 30 g-NaCl L(-1). Although the perchlorate reduction rates decreased with increasing NaCl concentration, ST-PRBC (resp., N-PRBC) could reduce perchlorate until 75 g-NaCl L(-1) (resp., 30 g-NaCl L(-1)). The reduction yield (1.34 +/- 0.05 mg-perchlorate per mg-acetate) and maximum perchlorate reduction rate (86 rng-perchlorate L(-1) h(-1)) of ST-PRBC was higher than those (1.16 +/- 0.03 mg-perchlorate per mg-acetate and 48 mg-perchlorate L(-1) h(-1)) of N-PRBC. Kinetic analysis showed that NaCl acted as an uncompetitive inhibitor against both PRBCs. The inhibition constants were 25 and 41 mg-NaCl L(-1) for N-PRBC and ST-PRBC, respectively. (C) 2011 Elsevier Ltd. All rights reserved.
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