Research progress on the tracing nitrate sources in water bodies based on stable isotopes
It is of great significance to trace the source of nitrate in water bodies.In recent decades,the nitrogen and oxygen stable isotopes have been widely used to identify the source of nitrates in various water bodies.This paper mainly gave a summary of the detection methods of nitrogen and oxygen stable isotopes in nitrate,presented a review of the development of the mathematical model for tracing nitrogen and oxygen stable isotopes,made a detailed introduction of the principle and application of currently commonly used models,and provided an analysis of the research progress on tracing nitrate using nitrogen and oxygen stable isotopes coupling other isotopes,microbial technology,and watershed hydrological models,etc.On this basis,the drawbacks of nitrogen and oxygen stable isotope technology in the identification of nitrate sources were summarized,followed by a prospect for future development of analysis of nitrate source in the water bodies.
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