YANG Xiaohong1,2, ZHANG Ruixue1, WANG Jingfu2,3, HE Kangkang1,2, CHEN Jingan2,3,, LIU Yong2,3
(1. College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China；
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China；3.University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: Phosphorus is an important life element in the earth surface environment. Due to the limitation of research methods, the understanding of phosphorus biogeochemical cycle process and mechanism is still lacking. Phosphate oxygen isotope (？18Op), as a new tracer, has become a potential effective tool for studying the phosphorus biogeochemical cycle. In this study, the basic principle of ？18Op tracing the source and circulation of phosphorus in the environment, the separation and purification of different media and the research progress of testing methods are summarized. Its application in the biogeochemical cycle of phosphorus in environmental science is reviewed. This paper focuses on the application of ？18Op technology in soil / sediment and aquatic ecosystem (rivers, lakes, oceans) in recent years. On this basis, the prospect of ？18Op in the future work is put forward: the further improvement and expansion of ？18Op technology (such as low phosphorus, high dissolved organic matter samples); the exploration of fractionation effect in algae and microbial system.
Keywords: phosphate oxygen isotope (？18Op); source tracing; biogeochemical cycle; soil and sediment; aquatic ecosystem
EARTH AND ENVIRONMENT Vol.49, No.3, Tot No.341, 2021, Page 325-335