厦门港间隙水碱度和沉积物反应活性

Pore Water Alkalinity and Sediment Reactivity in Xiamen Harbour

测定了厦门港沉积物间隙水NH^+_4、SO^(2-)_4、pH、AlK、Ept、Ca^(2+)和Mg^(2+)等参量的深度分布,探讨由SO^(2-)_4、NH^+_4、Ca^(2+)和Mg^(2+)浓度计算间隙水AlK的计算式,得出了沉积物成岩分解有机质N/C无素比值在柱样表层为0.16,深层为0.083,间隙水△SO^(2-)_4/△∑CO_2=0.51,通过表层沉积物的缺氧培养,测出了海区沉积物化学成岩反应活性的分布。

AlK, ammonia sulfate Ca Mg,pH and Ept in pore water were measured for cores for two study sites in Xiamen Harbour. The model for calculated carbonate alkalinity in pore waters of anoxic sediments of Berner Scott was used. The N/C ratios of decomposins orsanic matter from cores are respeptive 0. 16 within top 30 cm sedimen and 0. 083 below 30 cm of the sediment - water interface; [SO2-]/∑CO2 ratios in two cores are 0. 51. Rates of anaerobic decomposition of six stations in Xiamen Harbour were determined with incubation experiments