污染河口区沉积物-水界面营养盐交换通量的实验研究  

Experimental study on exchange flux of nutrients in sediment-water interface in polluted estuary area

作　　者：董慧[1] 郑西来[1] 张健[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《海洋环境科学》2012年第3期423-428,共6页Marine Environmental Science

基　　金：国家自然科学基金(4087250);国家重大水专项课题(2008ZX07208-009)

摘　　要：采集青岛市李村河口下游沉积物柱状样品,通过实验室培养实验,研究了溶解氧、温度、盐度、生物扰动等环境因素对沉积物-水界面营养盐交换通量的影响。结果表明,NO3-N、NH4-N、PO4-P在贫氧环境下的交换通量要高于富氧条件下,NO2-N受溶解氧含量的影响较小;随着温度的升高,NO3-N、NH4-N、PO4-P的交换通量增大,而NO2-N的交换通量减小;NO2-N和NH4-N的交换通量随盐度增大而增大,NO3-N减小,而PO4-P受盐度的影响较小;生物扰动对营养盐在沉积物-水界面的交换通量的影响显著。The incubation method in lab was adopted to simulate and measure the exchange flux of the nutrients in the sediment-water interface under different environment factors in order to study the effect of related factors. The results showed that the exchange flux of NO3-N, NH4-N and PO4-P was higher in the anoxic situation than the aerobic situation. However, the effects of DO levels on NO2- N were unclear. As increase of temperature, the exchange flux of NOa-N, NH4-N and POg-P were higher, but NO2-N was just showed opposite trend. The exchange flux of NO2-N and NH4-N were high when salinity was increased. The exchange flux of PO4-P was influenced few with salinity. The biological activity has an important effect on the exchange flux of dissolved nutrients.

关 键 词：沉积物-水界面 营养盐 交换通量 

分 类 号：X55[环境科学与工程—环境工程] X820