摘要
磷不仅是构成生命有机体的主要元素之一,它在生态系统内的迁移转化也是生态系统结构和功能的决定性因素之一。磷进入河流、湖泊和海洋当中,会促进水体初级生产者浮游植物、藻类、海草等生物的生长。但是磷的过量输入,溶解态磷中的正磷酸盐部分(PO43-、HPO42-、H2PO4-)可作为营养物质被水中藻类摄取并大量繁殖,会破坏水生生态系统的平衡,产生富营养化等一系列问题,所以研究这种形态的磷具有重要的环境意义。因此,研究磷酸盐的来源及迁移转化对于水生生态系统的有效管理和恢复是非常必要的。文章总结了利用磷酸盐中的氧同位素示踪磷物质来源的原理、方法和应用等方面的研究进展,磷酸盐的氧同位素有望成为研究磷的来源和生物地球化学循环的有效方法和重要研究方向。
Phosphorus(P),delivering and circulating as a structural and functional decisive component of all ecosystems,is a essential element of all life.When P enters rivers,lakes,and coastal waters,it stimulates the growth of aquatic primary producers(phytoplankton,algae and sea grass).Dissolved inorganic orthophosphate(PO43-,HPO42-,H2PO4-),which is of significance to environment,is assimilated readily as nutrition by algae for growth and reproduction.However,the extra input of phosphorus,destroying the balance of aquatic ecosystem,will cause nutrient enrichment and other environmental problems.Therefore,in order to manage and restore aquatic ecosystem effectively,it is important to research the source and delivery of Phosphorus.This paper summarizes progress on the principle,method and application of using oxygen isotopes of phosphate to trace sources phosphorus.The oxygen isotope composition of dissolved inorganic orthophosphate(δ18OP) measurements have great potential to be a effective method and important research field for tracing sources and biogeochemical cycling of phosphorus.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第S2期360-363,共4页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项资助(2008ZX07103-003)
关键词
磷酸盐
磷来源
氧同位素
生物地球化学循环
oxygen isotopes
phosphorus source
oxygen isotope
biogeochemical cycling
