Seasonal Variation of Anammox and Denitrification in Sediments of Two Eutrophic Urban Lakes
Jianwei Zhao, Duanwei Zhu, Junnan Fan, Yumei Hua, Wenbing Zhou
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Laboratory of Eco-Environmental Engineering Research of Huazhong Agricultural University,
Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River),
Ministry of Agriculture, Wuhan 430070, China
Submission date: 2015-04-15
Final revision date: 2015-07-05
Acceptance date: 2015-08-27
Publication date: 2015-11-27
Pol. J. Environ. Stud. 2015;24(6):2779-2783
For this study a 15N isotope culture was prepared in sediments collected from two eutrophic lakes to determine the potential for the anammox process and denitrification of the sediments. Test result showed that the average reaction rate of the anammox process for the entire year is 137±77 μmol N·m-2·h-1, contributing 10.4% to nitrogen gas evolution from the sediments. The anammox process in the lake has an obvious seasonal affect in the following order: summer (237±83 μmol N·m-2·h-1) > autumn (133±30 μmol N·m-2·h-1) > spring (90±24 μmol N·m-2·h-1) > winter (87±26 μmol N·m-2·h-1). A positive correlation (P<0.01) exists between the rates of the anammox process and denitrification.
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