%0 Journal Article
%T Relationship between oxygen release from plants in constructed wetland and oxygen demand for pollutant degradation<br>人工湿地植物泌氧与污染物降解耗氧关系研究
%A Wu Haiming
%A Zhang Jian
%A Li Weijiang
%A Zhang Bo
%A <br>吴海明
%A 张建
%A 李伟江
%A 张波
%J 环境工程学报
%D 2010
%I 
%X Typha orientalis, Phragmites australis and Scirpus validus were cultivated in the static water to evaluate their capacity of oxygen release and pollutant removal. Oxygen release from plants and oxygen demand for the degradation of pollutants in this experiment were calculated and their relationship was also analyzed. Results showed that the capacity of oxygen release from Phragmites australis was the highest, followed by Typha orientalis and Scirpus crassipes. The rate of oxygen release of Phragmites australis from per fresh plant mass and per unit wetland surface area from was 3.36 mg O2/(g·d) and 4.35 g O2/(m2·d), respectively. Aquatic plants played an important role in the removal of pollutants in constructed wetlands. The average removal rates of COD ranged from 3.46 to 3.77 g/(m2·d), NH+4-N from 0.07 to 0.13 g/(m2·d), TN from 0.25 to 0.27 g/(m2·d), TP 0.09 g/(m2·d), and all of them were higher than the control. The total amount of oxygen release from planted units ranged from 0.48 to 0.55 g O2/d, and the oxygen demand for the degradation of COD and NH+4-N was from 0.41 to 0.46 g O2/d. The net amount of oxygen release from planted units ranged from 0.02 to 0.12 g O2/d.A significant positive correlation existed between the oxygen release of plants and the oxygen demand for the degradation of COD and NH+4-N. If constructed wetland was built to treat urban sewage, the potential degradation loading of COD and NH+4-N would range from 3.81 to 4.35 g/(m2·d) and 0.83 to 0.95 g/(m2·d), respectively. The maximum hydraulic loading would be between 1.65 and 1.89 cm/d.
%K oxygen release
%K removal efficiency
%K pollutant
%K degradation
%K oxygen demand<br>泌氧能力
%K 去除效果
%K 污染物降解
%K 耗氧量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=7671AF0E1C7EB420D16CA956ACD7AE4D&yid=140ECF96957D60B2&vid=E158A972A605785F&iid=9CF7A0430CBB2DFD&sid=2CF50ACB94270F08&eid=D3A55680A8B4A1DC&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=2&reference_num=0