重庆双龙湖水草对营养盐的吸附与释放试验研究

STUDY ON RELEASE AND ADSORBING OF NUTRIENTS FROM IMMERSED AQUATIC PLANT OF THE SHUANGLONG LAKE

双龙湖是浅水型城市湖泊,一度为重富营养化湖泊。综合治理后内源污染可能成为湖泊营养物的主要负荷。研究湖中生长和死亡的水草对限制性营养元素——氮、磷释放规律,对于修复水体、保持水质具有重要意义,为湖泊内源治理、水环境保持提供科学依据。本文通过对双龙湖水草浸泡试验研究,计算出总氮和总磷在不同光照、温度、溶氧条件平均释放强度;分析水草在不同浸泡条件下氮、磷营养盐的行为模式和迁移转化途径,从而采取适宜措施维护双龙湖水质。

The Shuanglong Lake is a shallow lake in the urban city, it had once been a severe typical eutrophic lake. After comprehensively harnessing,the endogenesis pollution may become main internal loading of nutrient in the lake. It is important to ascertain the alive and dead aquatic plant＇ s releasing regularity of nitrogen and phosphorus which is the limited nutrient from the lake. By doing this, we can rehabilitate and maintain water quality of the lake; provide the scientific foundation for harnessing the lake＇s endogenesis pollution and protecting the environment. By studying this experiment, we calculate the releasing intensity of TN and TP in different illumination, temperature and DO condition; analyze the behavior mode and the migration and conversion paths of nitrogen and phosphorus nutrients and protect the waterbody.