摘要
依据斯托克斯原理制作了水淘选颗粒物分级装置，考察了流量对于颗粒物分级的影响，确定了适宜的操作流量。同时在选定的实验条件下对现场悬浮颗粒物进行了分级，并用吸管法对方法的分级效率进行了检验。结果表明，水淘选装置对悬浮颗粒物各粒级颗粒物的分级效率在50％～95％之间，分级效果较好。同时运用建立的方法对在长江、长江口以及黄河获得的悬浮颗粒物进行了现场分级，获得了不同粒级悬浮颗粒物，并进而采用改进的SEDEX方法进行了磷的赋存形态分析，结果表明：有机磷、自生磷灰石磷主要存在于细颗粒物中，而碎屑磷则主要集中粗颗粒物中。
Water elutriation that was based on Stokes＇ low could separate particles into different size classes. In this study, water elutriation apparatus was applied to explore the water flow rate that affected the efficiency of the water elutriator, and appropriate water flow rate was determined. Water elutriator was also used to separate the suspended particulate maters in field with determined conditions. The efficiency of the equipment was analyzed with the pipe method. The result indicated that the efficiency ranged between 50%-95%, which indicated that water elutriator separate suspended particulate particle by size successfully. In this study, the fractioned suspended particles of Changjiang, Changjiang Estuary and Huanghe were also obtained in field with the water elutriation method and modified SEDEX were applied to distinguish the distribution of different particle phosphorus forms in different particle size classes. The result indicated that while Organic P, and Authigenic P decreased with the increase of particle size, high content Detr-P was found in coarse silt and very coarse silt fractions.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第2期68-72,共5页
Periodical of Ocean University of China
基金
国家自然科学基金重大项目(30490232)
国家重点基础研究发展规划项目(2002CB412405
2005CB422305)资助
关键词
颗粒物分级
水淘选法
颗粒磷
悬浮颗粒物
particle size fractionation
water elutriation
particle phosphorus forms
suspended particulate matter
