地表水中含氮化合物变化及迁移规律初探

文章研究了上海某污染河道污染断面及其下游断面河水中几种含氮化合物及其底泥中总氮的含量变化,初步探索含氮化合物的转换规律及迁移。研究发现在污染断面,河水难以得到自净的机会,底泥中的总氮持续累积;在研究河流的下游断面,地表水中的含氮化合物含量变化与上游污染断面不完全一致,说明上游水体中的含氮化合物在向下游迁移,但迁移的同时,河道水质也受到其它含氮污染源的影响,并且由于水质的好转,溶解氧含量升高,同时发生了氨的硝化;而随着上覆水体的水质好转,底泥中的总氮含量也略有下降。

Exploration of The Change of Nitrogen Compounds in Surface Water and Removal of Nitrogen

In this paper,combined with the concentrations of several nitrogen compounds in a contaminated river and its sediment,the changing disciplinarian of nitrogen compounds in surface water and sediment as well as removal of nitrogen were explored.It was found that at the contaminated section,the surface water can hardly be cleaned and TN cumulated in the sediment at this section.While at the downstream sections,change of concentrations of nitrogen compounds didn't keep coincident with those at the contaminated upriver section.This means that with the move of nitrogen compounds from the contaminated section to downstream,other nitrogen sources pollute this river,too.And nitration of NH3 is taking place at the same time.Meanwhile,with the improving of the surface water quality,the concentration of TN in the sediment at corresponding section decreased slightly.