Spatial variations in and environmental significance of nitrogen forms in river sediments from two different watersheds in eastern China
- 9 May 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 192 (6), 1-12
- https://doi.org/10.1007/s10661-020-08283-5
Abstract
Nitrogen is considered an essential nutrient element limiting water productivity, and its distribution in sediments directly affects its release potential. This study aimed to analyse the spatial characteristics, distribution, and influence of nitrogen forms in two different river catchments situated in eastern China. Using sequential extraction methods, the study divided sediment nitrogen into four forms, namely, an ion-exchangeable form (IEF-N), weak acid-extractable form (WAEF-N), strong alkali-extractable form (SAEF-N), and strong oxidant-extractable form (SOEF-N). The results for the two catchments showed significant differences in the physicochemical properties as well as variations in space. The mean proportion of total transferable nitrogen (TTN) in the Anhe, Suihe, Dongtiaoxi, and Xitiaoxi rivers accounted for 50.64%, 32.87%, 34.63%, and 40.45%, respectively. The results also revealed a higher total TTN in the Hongze watershed than in the Tiaoxi watershed. The order of mean TTN in sediments from the Hongze watershed was SOEF-N > SAEF-N > IEF-N > WAEF-N, whereas that for the Tiaoxi watershed was SOEF-N > SAEF-N > WAEF-N > IEF-N. The distribution of nitrogen forms in the sediments was significantly impacted by the sediment composition and environmental factors, as shown by correlation and redundancy analysis (RDA).Funding Information
- National Natural Science Foundation of China (41372354)
This publication has 29 references indexed in Scilit:
- 3D Flowerlike Copper Sulfide Nanostructures Synthesized from Copper (I) Oxide Hollow MicrospheresProcedia Engineering, 2012
- Assesment of Water Pollution in the Tigris River in Diyarbakır, TurkeyWater Practice & Technology, 2010
- Nitrogen Distribution and Potential Mobility in Sediments of Three Typical Shallow Urban Lakes in ChinaEnvironmental Engineering Science, 2009
- Benthic metabolism and the fate of dissolved inorganic nitrogen in intertidal sedimentsEstuarine, Coastal and Shelf Science, 2009
- Assessment of surface water quality using multivariate statistical techniques: A case study of the Fuji river basin, JapanEnvironmental Modelling & Software, 2007
- Geochemical characteristics of nitrogen in the southern Yellow Sea surface sedimentsJournal of Marine Systems, 2005
- Landscapes and Riverscapes: The Influence of Land Use on Stream EcosystemsAnnual Review of Ecology, Evolution, and Systematics, 2004
- Environmental change in river channels: a neglected element. Towards geomorphological typologies, standards and monitoringScience of The Total Environment, 2003
- Nitrogen export by runoff and sediment under different types of land use in West Tiaoxi catchmentJournal of Geographical Sciences, 2002
- Distribution of exchangeable, fixed, organic and total nitrogen in interbedded turbiditic/pelagic sediments of the Madeira Abyssal Plain, eastern North AtlanticMarine Geology, 1992