Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes
Zhang, Y; Li, FD; Zhang, QY; Li, J; Liu, Q
2014
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume490Pages:213-222
AbstractWater pollution in the form of nitrate nitrogen (NO3--N) contamination is a major concern in most agricultural areas in the world. Concentrations and nitrogen and oxygen isotopic compositions of nitrate, as well as oxygen and deuterium isotopic compositions of surface and groundwater from a typical irrigated region in the North China Plain (NCP) collected from May to October in 2012 were analyzed to examine the major nitrate sources and transformations. Concentrations of NO3--N ranged from 0.2 to 29.6 mg/L (mean of 11.2 mg/L) in surface water, and from 0.1 to 19.4 mg/L (mean of 2.8 mg/L) in groundwater. Approximately 46.7% of the surface water samples and 10% of the groundwater samples exceeded the World Health Organization (WHO) drinking water standard for NO3--N. Surface water samples that exceeded the standard were collected mainly in the dry season (May and October), while groundwater samples that exceeded the standard were collected in the wet season (June). Overall, the highest nitrate levels were observed in surface water in May and in groundwater in June, indicating that fertilizer application, precipitation, and irrigation strongly influence the NO3--N concentrations. Analyses of isotopic compositions suggest that the main sources of nitrate are nitrification of fertilizer and sewage in surface water, in contrast, mineralization of soil organic N and sewage is the groundwater sources during the dry season. When fertilizers are applied, nitrate will be transported by precipitation through the soil layers to the groundwater in the wet season (June). Denitrification only occurred in surface water in the wet season. Attempts should be made to minimize overuse of nitrogen fertilizers and to improve nitrogen use efficiency in irrigated agricultural regions. (C) 2014 Elsevier B.V. All rights reserved.
SubtypeJournal
KeywordNitrate Isotope Irrigated agricultural region Surface water Groundwater
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEnvironmental Sciences
WOS KeywordNORTH CHINA PLAIN ; INTENSIVE CROPPING SYSTEMS ; YELLOW-RIVER ; FERTILIZER NITROGEN ; OXYGEN ; AGRICULTURE ; CONTAMINATION ; DENITRIFICATION ; IRRIGATION ; MANAGEMENT
Indexed BySCI
Language英语
WOS IDWOS:000347293800024
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:62[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44517
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhang, Y,Li, FD,Zhang, QY,et al. Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2014,490:213-222.
APA Zhang, Y,Li, FD,Zhang, QY,Li, J,&Liu, Q.(2014).Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes.SCIENCE OF THE TOTAL ENVIRONMENT,490,213-222.
MLA Zhang, Y,et al."Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes".SCIENCE OF THE TOTAL ENVIRONMENT 490(2014):213-222.
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