黄河利津水文站不同粒径悬浮颗粒物中有机碳含量的研究

Particulate Organic Carbon Content in Size-Fractioned Total Suspended Solids at LiJin Hydrographic Station of the Huanghe River

估算不同粒径TSS中POC的入海日通量。对黄河利津水文站悬浮颗粒物（total suspended solid,TSS）样品。采用基于stokes原理的沉降法分为V级。对分级后的样品测其有机碳（particulate organic carbon，POC）含量和粒度组成。在此基础上。用多元线性回归法对数据进一步处理，准确得到样品中不同粒径TSS中POC的含量。研究表明，黄河口淡水端水体TSS。〈8μm的粘土和极细粉砂、8～16vm的细粉砂中，POC的含量为0．600％和0．400％左右；16～32μm的中粉砂中，POC的含量不足0．200％；而32～63μm的粗粉砂和〉63μm砂中POC含量仅为0．050％和0．004％左右，80％以上的POC主要集中在〈16μm的TSS中。而〈32μm的TSS承载了95％以上的POC。

We studied the particulate organic carbon content in size-fractioned total suspended solids at LiJin hydrographic station of the Huanghe River. The results indicated that the weight percentage of particulate organic carbon （POC%） in TSS of the Huanghe Estuary freshwater ranged from 0.6% to 0.4% for fine particles （〈8μm and 8-16μm）, for 16-32μm particles the value was below 0.2% ; and for 32-63μm and 〉63μm particles the values were only 0.05% and 0.005% respectively, more than 80% of POC are concentrated in the fine particles （〈 16μm） while over 95 % of POC were concentrated in particles of size 32μm. And the daily POC fluxes to the sea in size-fractioned TSS were estimated in June, 2005.