کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6329031 | 1619780 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes
ترجمه فارسی عنوان
ردیابی منابع آلودگی نیترات و تبدیل آن در سطح و آبهای زیرزمینی با استفاده از ایزوتوپهای محیطی
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کلمات کلیدی
NCPδDLMWLMCLCASGroundwater - آب های زیرزمینیSurface water - آبهای سطحیChinese Academy of Sciences - آکادمی علوم چینیdissolved oxygen - اکسیژن محلولIsotope - ایزوتوپLocal meteoric water line - خط آب شهری محلیNorth China Plain - دشت شمال چینElectrical conductivity - رسانایی الکتریکیWorld Health Organization - سازمان بهداشت جهانیNitrate - نیتراتnitrate nitrogen - نیترات نیتروژنWHO - که
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Water pollution in the form of nitrate nitrogen (NO3â-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 NO3â-N ranged from 0.2 to 29.6Â mg/L (mean of 11.2Â mg/L) in surface water, and from 0.1 to 19.4Â mg/L (mean of 2.8Â 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 NO3â-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 NO3â-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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 490, 15 August 2014, Pages 213-222
Journal: Science of The Total Environment - Volume 490, 15 August 2014, Pages 213-222
نویسندگان
Yan Zhang, Fadong Li, Qiuying Zhang, Jing Li, Qiang Liu,