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Estimation of N-2 and N2O ebullition from eutrophic water using an improved bubble trap device

文献类型： 外文期刊

作者： Gao, Yan 1 ; Liu, Xinhong 1 ; Yi, Neng 2 ; Wang, Yan 1 ; Guo, Junyao 1 ; Zhang, Zhenhua 1 ; Yan, Shaohua 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjng 210014, Peoples R China

2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Jiangsu, Peoples R China

关键词： Nitrogen;Ebullition;Eutrophic;N-2;N2O

期刊名称：ECOLOGICAL ENGINEERING （ 影响因子：4.035； 五年影响因子：4.611 ）

ISSN： 0925-8574

年卷期： 2013 年 57 卷

页码：

收录情况： SCI

摘要： Ebullition pathway of N-2 and N2O emission and its importance on nitrogen loss were quantified during a survey of a eutrophic pond located at the subtropical climate zone in China. Using an improved bubble trap device, in situ collection of N-2 bubbles was achieved by avoiding the contamination of N-2 in the air. Measurements using the device indicated very high ebullition rates (36.3-366.7 ml m(-2) h(-1)) and N-2 ebullition flux (0.025-0.297 g m(-2) h(-1)) at warmer months of September and October. The ebullition rates and N-2 ebullition fluxes dropped sharply in colder months of December and January, ranged 2.5-15.9 ml m(-2) h(-1) and 0.002-0.016 g m(-2) h(-1), respectively. Distinct spatial variation of ebullition rates, and N-2 and N2O ebullition fluxes were observed, with the highest rate at the heavy sediment location. Ebullition of N2O was a very minor fraction of total gaseous nitrogen released to air. The data demonstrated that ebullition could contribute greatly to biogenic N-2 fluxes in eutrophic waters with significant bubble emission. (C) 2013 The Authors. Published by Elsevier B. V. All rights reserved.

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