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研究湖泊沉积物中磷的再迁移循环 ,对预防湖泊富养化现象发生和修复已污染湖泊具有重要意义。通过对沉积物柱芯孔隙水地球化学、沉积物中磷的不同化学相、沉积速率、磷沉积通量的研究 ,可以计算湖泊沉积物磷的释放通量。湖泊表层沉积物中积累的大量有机质的矿化分解和埋藏作用造成的沉积物中磷酸盐溶解释放 ,可能会使相当数量沉积磷重新回到水体 ,沉积磷可能成为造成湖泊富营养化问题的二次污染物源。我们在贵州百花湖的研究 ,详细阐述了磷在湖泊沉积物 -水界面的迁移过程。
Studying the redistribution of phosphorus in lacustrine sediments is of great significance in preventing lake enrichment and repairing contaminated lakes. Phosphorus fluxes in lake sediments can be calculated by studying the geochemical characteristics of pore water in sediment cores, different chemical phases of phosphorus in sediments, deposition rates and phosphorus deposition flux. Phosphate dissolution and release in the sediments caused by mineralization and burial of a large amount of organic matter accumulated in lake surface sediments may cause a considerable amount of sedimentary phosphorus to be returned to the water body. Sedimentous phosphorus may become the second cause of lake eutrophication Secondary pollutant source. Our study of Baihua Lake in Guizhou details the migration process of phosphorus at lake sediment-water interface.