[Source of Groundwater Nitrate in Luanping Basin Based on Multi-environment Media Nitrogen Cycle and Isotopes].

• DOI: 10.13227/j.hjkx.202004142
• Publication Date: 2020-11-08
• Authors: Hou-Yun Sun; Xiaofeng Wei; Feng-Chao Jia; Duojie Li; Jian Li; Xia Li; Yin Zhiqiang
• Keywords: Nitrates; Nitrogen Isotopes; Groundwater; Water Pollutants, Chemical; Environmental Monitoring

The multi-environment media of water, surface soil and vadose zone samples were collected in the upstream Miyun Reservoir, Luanping Basin Chengde City, Hebei Province. aim was to identify pollution source, ratio, spatial distribution, migration, transformation characteristics nitrogen groundwater. Hydrogeochemistry, total nitrogen, dissolved nitrate analysis a multi isotope tracer technique δ15 N-NO3 δ18O-NO3, δ34S-SO4 δ18O-SO4, δ14 C, combined with land-use type geostatistics, used study. results showed that main form groundwater Basin. NO3- concentration significantly correlated types residential land cultivated where shallow mainly distributed. Of samples, 13.79% exceeded National Standard Ⅲ for Groundwater (GB/T 14848-2017) value, while excess multiple 1.04-3.86, 37.93% World Health Organization standard value. 1.08-6.83. variation concentration, affected by combination natural structural factors anthropogenic factors. source from livestock manure domestic sewage, followed chemical fertilizer leaching. cycle aeration zone-groundwater-dominated circulation runoff area piedmont basin nitrification. These findings are highly significant prevention remediation when viewing system as an independent unit, studying sources fate water environment.