浙江沿岸海域柱状沉积物中磷的赋存形态及特征研究

对浙江沿岸海域3个柱状沉积物进行了总磷测定并采用连续提取技术（SEDEX）测定了柱状沉积物中5种形态磷，运用210Pb法测定沉积速率并利用测年结果结合不同年份的一些气候或人类活动事件，分析了总磷、无机磷及5种形态磷的垂直分布特征和有机磷的降解。研究结果表明，不同站位各种形态磷的垂直分布特征不相同，这与沉积环境及成岩作用有关。3个柱状沉积物中的有机磷都在表层或次表层出现了快速下降的趋势，表明有机磷的降解主要发生在表层有氧区和次表层。

Study on the chemical forms of phosphorus and their vertical distributions in core sediments from Zhejiang offshore

Total phosphorus of three columnar sediments in Zhejiang offshore was measured. A sequential extraction method (SEDEX) was adopted to measure phosphorus of 5 forms in the columnar sediments. 210Pb method was used to measure the deposition rate. Age-dating results were combined with some climatic or human activity events to analyze the vertical distribution characteristics of total phosphorus, inorganic phosphorus and phosphorus of 5 forms, and degradation of organic phosphorous. The research results indicated that vertical distribution characteristics of phosphorus in various forms at different stations were different, relating to the sedimentary environment and diagenesis. Organic phosphorous in the core sediments showed the rapidly declining trends in the surface layer or sub-surface, indicating that degradation of organic phosphorous mainly occurred in the surficial aerobic zone and sub-surface.