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学科主题: Oceanography
题名: Nitrous oxide concentration and nitrification and denitrification in Zhujiang River Estuary, China
作者: Xu, JR ; Wang, YS ; Wang, QJ ; Yin, JP
通讯作者: jirongxu@sina.com
关键词: nitrous oxide ; nitrification ; denitrification ; nitrate reduction ; acetylene inhibition technique ; bacterial activities ; Zhujiang River Estuary
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2005
卷: 24, 期:3, 页:122-130
收录类别: sci
部门归属: Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Ningbo Univ, Fac Architectural Engn & Environm, Zhejiang 315211, Peoples R China
项目归属: 广东省海洋药物重点实验室
摘要: The concentrations of nitrous oxide varies between 57 and 329 nmol/dm(3), saturation is 674%similar to 4 134% in the Zhujiang River Estuary. This suggests that the area is an emissive source of nitrous oxide. The acetylene inhibition technique is employed to evaluate the rates of nitrification, denitrification and nitrate reduction by bacterial activities in the sediments at three sites. The average of nitrification, denitrification and nitrate reduction rates ranges from 0.32 to 2.43, 0.03 to 0.84 and 4.17 to 13.06 mmol/(m(2) center dot h), respectively. The vertical profiles of the sediments show that the nitrification and denitrification processes mainly take place in the depth from 0 to 4 cm and depend on regional conditions. The rates of nitrification, denitrification and nitrate reduction are dominated by Eh, nitrate and ammonium concentrations in sediments and DO in overlay water. There is a coupling between nitrification and denitrification.
WOS记录号: WOS:000231257900014
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/2237
Appears in Collections:广东省海洋药物重点实验室_期刊论文

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Xu, JR; Wang, YS; Wang, QJ; Yin, JP.Nitrous oxide concentration and nitrification and denitrification in Zhujiang River Estuary, China,ACTA OCEANOLOGICA SINICA,2005,24(3):122-130
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