气候变化领域集成服务门户(CCPortal): Nitrogen removal in the sediments of the Pearl River Estuary; China: Evidence from the distribution and forms of nitrogen in the sediment cores

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DOI	10.1016/j.marpolbul.2018.11.040
	Nitrogen removal in the sediments of the Pearl River Estuary; China: Evidence from the distribution and forms of nitrogen in the sediment cores
	Hong Y.; Wu J.; Guan F.; Yue W.; Long A.
发表日期	2019
ISSN	0025326X
起始页码	115
结束页码	124
卷号	138
英文摘要	In this study, the spatial distribution and forms of nitrogen in sediment cores collected from the Pearl River Estuary were analyzed. Exchangeable nitrogen (Nex) comprised only a small proportion of total nitrogen (Ntot), with a mean of 3.54% in the sediment cores. NH4+ was the main form of Nex. No obvious change was observed in the vertical content of fixed ammonia (Nfix) in the sediments, and the mean Nfix in all five sediment cores was 141.23 mg·kg−1. The organic nitrogen (Norg), strongly related to organic carbon (Corg), was the main form in Ntot. The dissolved inorganic nitrogen in sediment pore water was much lower than that in estuarine water and no significant variation was observed from upstream to downstream. Our results indicated that most nitrogen deposited on surface sediments from overlying water was rapidly removed by a series of microbial processes, reducing the extent of nitrogen returning to overlying waters. © 2018
英文关键词	Distribution; Nitrogen loss; Nitrogen species; Pearl River Estuary; Sediment core
语种	英语
scopus关键词	Ammonia; Estuaries; Gems; Nitrogen removal; Organic carbon; Sedimentation; Sediments; Distribution; Nitrogen loss; Nitrogen species; Pearl River estuary; Sediment core; Rivers; brackish water; inorganic nitrogen; nitrogen; organic carbon; organic nitrogen; surface water; unclassified drug; nitrogen; core analysis; estuarine sediment; microbial activity; nitrifying bacterium; nitrogen; organic nitrogen; sediment chemistry; sediment core; spatial distribution; spatial variation; Article; chemical structure; China; controlled study; downstream processing; environmental change; eutrophication; geographical variation (species); nonhuman; pore size; sediment; spatial analysis; surface area; waste component removal; analysis; chemistry; denitrification; environmental monitoring; estuary; metabolism; sediment; water pollutant; China; Guangdong; Zhujiang Estuary; China; Denitrification; Environmental Monitoring; Estuaries; Geologic Sediments; Nitrogen; Water Pollutants, Chemical
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150237
作者单位	School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
推荐引用方式 GB/T 7714	Hong Y.,Wu J.,Guan F.,et al. Nitrogen removal in the sediments of the Pearl River Estuary; China: Evidence from the distribution and forms of nitrogen in the sediment cores[J],2019,138.
APA	Hong Y.,Wu J.,Guan F.,Yue W.,&Long A..(2019).Nitrogen removal in the sediments of the Pearl River Estuary; China: Evidence from the distribution and forms of nitrogen in the sediment cores.Marine Pollution Bulletin,138.
MLA	Hong Y.,et al."Nitrogen removal in the sediments of the Pearl River Estuary; China: Evidence from the distribution and forms of nitrogen in the sediment cores".Marine Pollution Bulletin 138(2019).