长江口岸带柱状沉积物中磷的存在形态及其环境意义

Species of phosphorus in core sediments from the Changjiang Estuary and its environmental significance

通过对长江河口岸带柱状沉积物中P的分析 ,揭示了沉积物中P的存在形态和分布特征。柱状沉积物中P的存在形态主要有DP、Al P、Fe P、Ca P和OP等 5种 ,其中以Ca P(约占TP的 2 8%～ 5 2 % )和OP(约占TP的 43%～ 6 8% )为主。研究发现 ,在近排污口的柱状沉积物中Al P和有机碳 (TOC)具有相似的变化趋势 ,且Al P含量明显高于非排污口处的朝阳柱样 ,反映了柱状沉积物中各形态P的分布特征受人类活动的影响比较明显。此外 。

Species of phosphorus and the property of their distribution with depth are discussed by comparing Shidongkou to Chaoyang core sediments in this paper. Phosphorus in the core sediments from Changjiang Estuary mainly consists of DP, Al P, Fe P, Ca P and OP, predominating OP and Ca P. It is founded there is obvious coupling between Al P and TOC in core sediments near sewage discharge outlet, which indicates human activities have an obvious effect on the existing species of phosphorus in sediments. In addition, this finding shows that the distribution of phosphorus species is markedly subjected to sedimentation rate in vertical core sediments from slightly and highly siltation in the coastal areas.