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Cho, Jaeweon
OWIELAB(Organic-Water Interface Engineering Laboratory)
Research Interests
  • Convergence of Science and Arts, Feces Standard Money (FSM), Water & Energy

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Abundance of denitrifying genes coding for nitrate (narG), nitrite (nirS), and nitrous oxide (nosZ) reductases in estuarine versus wastewater effluent-fed constructed wetlands

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Title
Abundance of denitrifying genes coding for nitrate (narG), nitrite (nirS), and nitrous oxide (nosZ) reductases in estuarine versus wastewater effluent-fed constructed wetlands
Author
Chon, KyongmiChang, Jin-SooLee, EunkyungLee, JinwookRyu, JiyoungCho, Jaeweon
Keywords
Functional genes; Microbial activity; Real-time PCR
Issue Date
2011-01
Publisher
ELSEVIER SCIENCE BV
Citation
ECOLOGICAL ENGINEERING, v.37, no.1, pp.64 - 69
Abstract
Constructed and estuarine wetlands, influenced by wastewater treatment plants, were investigated, with respect to microbial activity in terms of functional genes. The density and abundance of three denitrifying genes coding for nitrate (narG), nitrite (nirS), and nitrous oxide (nosZ) reductases, in sediment soil samples from wastewater effluent-fed and estuarine wetlands, were quantified using the SYBR green-based real-time polymerase chain reaction (PCR). To assess seasonal effects (i.e., winter (average temperature similar to 2 degrees C) versus spring (average temperature similar to 20 degrees C)), the densities of denitrifying genes, with respect to the abundance of functional genes, for the two different wetlands were determined. The three functional genes for all the sampling sites ranged from 1.0 x 10(6) to 1.0 x 10(9) copies/g of soil. Without considering seasonal variation, the nitrite-reducing functional genes were dominant over the other two genes in the effluent-fed wetland samples. However, nitrate and nitrite-reducing functional genes were dominant in relatively cold and warm seasons, respectively, in the estuarine wetland samples. Even though robust patterns and conclusions could not be obtained from the limited investigations, patterns with certain trends and needs for potential future research directions were obtained. (C) 2009 Elsevier B.V. All rights reserved
URI
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DOI
10.1016/j.ecoleng.2009.04.005
ISSN
0925-8574
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