文献类型：期刊文献

英文题名：Phosphorus speciation and sedimentary phosphorus release in an urban bay (Dachan Bay, China) impacted by multiple anthropogenic perturbations

作者：Ke, Sheng[1];Chen, Chunliang[1];Zhang, Peng[2];Yang, Bo[3];Sun, Xingli[1];Zhang, Jibiao[2]

机构：[1]Guangdong Ocean Univ, Analyt & Testing Ctr, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen 518114, Guangdong, Peoples R China

年份：2022

卷号：185

外文期刊名：MARINE POLLUTION BULLETIN

收录：SCI-EXPANDED(收录号：WOS:000892144600005)、、EI(收录号：20224513072344)、Scopus(收录号：2-s2.0-85141245939)、WOS

基金：The authors are grateful for the anonymous reviewers'careful review and valuable suggestions to improve the manuscript. This research was financially supported by Research and Development Projects in Key Areas of Guangdong Province (2020B1111020004) ; Guangdong Basic and Applied Basic Research Foundation (2020A1515110483) ; First-class Special Fund (231419018) and Innovation Strong School Project (230420021) of Guangdong Ocean University.

语种：英文

外文关键词：Sedimentary phosphorus; Human activity; Phosphorus pollution index; Long-term P release; Dachan Bay

外文摘要：Sedimentary phosphorus (P) release and retention are important in controlling P dynamics in coastal waters. Here, two sediment cores were analysed to understand the P speciation and sedimentary P release characteristics in Dachan Bay, Shenzhen, where was highly influenced by human activity. Total phosphorus (TP) concentra-tions, 52.3 to 1119 mu g g-1, fluctuated greatly with depth. Four P binding forms were fractionated: iron-bound P (Fe-P), authigenic apatite (Ca-P), detrital P (De-P), and organic P (OP) with the following order of concen-tration: Fe-P > OP > De-P > Ca-P. The P pollution index (PPI) revealed the contamination of sediment with P in recent years. Additionally, the potentially mobile P pools and long-term P release in the sediments were esti-mated, and the results indicated that, sediment was an important potentially mobile P pools in the water column, especially in nearshore areas, which required the attention of management departments.