天津汉沽海域表层沉积物中P的赋存特征分析  

Species of phosphorus in surface sediments from the sea area of Hangu in Tianjin

作　　者：赵迪[1] 侯立军[1] 宗海波[1] 丁平兴[1] 张淑芳[2] 张宇铭[3] 

机构地区：[1]华东师范大学河口海岸国家重点实验室,上海200062 [2]国家海洋环境监测中心,辽宁大连116023 [3]中国海洋大学海洋环境学院,山东青岛266100

出　　处：《海洋环境科学》2012年第2期176-180,共5页Marine Environmental Science

基　　金：海洋公益性行业科研专项经费项目(200905007);国家自然科学基金项目(41071135;40701167);中央高校基本科研业务费专项基金资助;河口海岸学国家重点实验室科研业务经费(2010RCDW07)

摘　　要：利用连续分级提取方法,对天津汉沽海域表层沉积物中P的含量水平、赋存形态、及其生物有效性进行了分析。结果表明:表层沉积物中TP的含量在525.68×10-6～688.39×10-6之间,平均含量约为618.18×10-6,其中86.98%以IP的形式存在;而在IP中,FA-P是其主要的赋存形态,平均约占TP的59.54%;IP含量范围为48.52×10-6～146.72×10-6,平均约占TP的13.02%。P的生物有效性分析结果显示,潜在的生物有效P主要包括Ads-P、Fe-P和OP等3种赋存形态,而天津汉沽海域表层沉积物中潜在的生物有效P含量约为465.87×10-6～609.79×10-6,平均约占沉积物TP的89.14%,表明研究区域内沉积物具有很强的释P潜力。Species, contents and bioavailability of phosphorus in surface sediments from the sea area of Hangu in Tianjin were investi- gated using a sequential phosphorus extraction method. The results showed that the total phosphorus in the surface sediments were 525.68 ×10^-6 -688.39 ×10^-6 and were dominated by inorganic phosphorus which on average accounted for 86.98% of total phos- phorus. Among the species of inorganic phosphorus, detrital phosphorus was its dominant form which on average occupied 59.54% of total phosphorus. It was also found that bioavailable phosphorus in sediments mainly included loosely adsorbed phosphorus, Fe-bound phosphorus and organic phosphorus. Bioavailable phosphorus at the study area varied from 465.87×10^-6to 609.79×10^-6 , accounting for 89.14% of the sedimentary phosphorus pool. This observation reflected that sediments from the sea area of Hangu had a strong a- bility of release phosphorus into the pelagic water.

关 键 词：沉积物 磷 赋存形态 生物有效性 汉沽海域 

分 类 号：X142[环境科学与工程—环境科学]