Research of the phosphorus types and releasing rates from the water-sediment interface of Shanzi dee

论文发布时间：[2009-10-09] 范文大全编辑：Voive.net

所有作者：苏玉萍林婉珍林佳钟厚璋陈友震

作者单位：福建师范大学环境科学与工程学院

论文摘要：The SMT methods were used for the extraction of phosphorus species in the surface sediments of the Shanzi reservoir in Fujian province in ２００５。The results showed that the concentrations of total phosphorus in surface sediment ranged from ６４１mg/kg to １０６８ mg/kg and the concentrations gradually increase from the Riverine Zone to Transition Zone and Lacustrine Zone。 The content of total phosphorus decreases vertically from the surface sediment。 while the aluminium/Iron bounded phosphorus and the organic phosphorus were the preponderant forms in the sediment， which opplied about ７０％～８５％ of the total phosphorus concentration。 The high sedimentary phosphorus is a potential source of dissolved phosphorus to the overlying water and the exchange potentials of phosphates at the water–sediment interface were investigated by the sediment sampling from four sections area。 The capacity of releasing soluble phosphorus from the sediment is Lacustrine Zone larger then Transition Zone and the Riverine Zone。 The low release rate of soluble phosphorus is due to the existing environmental conditions in the river。 If condition such as DO changed， the release rate could increase by as much as ５-６ times， which could reach to １０。６６ mg&#８２２６；m-２&#８２２６；d-１。The sediment phosphorus load would be an important factor of the trophic status of the reservoir if the outside sources had been reduced。

关键词： sediment phosphorus types releasing rate deep reservoir Fujian province

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