摘要
采用室外完全随机试验,研究粉绿狐尾藻净水效果对水体氨氮、硝氮、总磷浓度的响应机制。试验发现,氨氮、硝氮浓度分别为25、15 mg/L时,粉绿狐尾藻在无污染物输入环境中能发挥最优净水效果。净水效果存在氨氮、硝氮浓度阈值,阈值之内净水效果与浓度呈正相关关系。高氨氮浓度(15～25 mg/L)环境中,粉绿狐尾藻对氨氮更具有亲和性,会抑制对硝氮的吸收,导致对硝氮的去除效果较差。总磷浓度在35 mg/L以内,随浓度增加,净水效果愈好。高磷环境能促进粉绿狐尾藻对氨氮、硝氮、总磷的吸收,并且氨氮、硝氮、总磷去除率最高。粉绿狐尾藻更适合净化高磷水体。夏季高温天气,粉绿狐尾藻对氨氮、硝氮、总磷的去除率30 d后分别可达78.1%～81.1%、59.1%～63.9%、85.7%～91.9%,对总磷、氨氮去除效果显著,硝氮去除效果较差。
Complete outdoor randomized trials are used to study how green Myriophyllum Verticillatum's water purification effect respond to the concentration of ammonia nitrogen,nitrate nitrogen and total phosphorus in water. We find that: Green Myriophyllum Verticillatum can purify water best in a stationary environment when ammonia nitrogen and nitrate nitrogen are 25,15 mg/L respectively. The concentration threshold of ammonia nitrogen and nitrous nitrogen exists in water purification effect,and the purification effect is positively correlated with concentration under the threshold. In the environment of high ammonia nitrogen concentration between 15~25 mg/L,green Myriophyllum Verticillatum is more affinity for ammonia nitrogen and can inhibit the absorption of nitrous nitrogen,and then makes nitrous nitrogen purification worse. Purification is also positively correlated with concentration when total phosphorus is under 35 mg/L. Besides,high total phosphorus can promote the absorption of ammonia nitrogen,nitrous nitrogen and total phosphorus,and improve the removal rate. Green Myriophyllum Verticillatum is more suitable for purifying high phosphorus water. The removal rate of ammonia nitrogen,nitrous nitrogen and total phosphorus can arrive at 78.1%~81.1%,59.1%~63.9%,85.7%~91.9% after 30 d under the summer environment,and is more significant for total phosphorus and ammonia nitrogen.
作者
陆庆楠
贺宇欣
庄文化
李龙国
王伟
LU Qing-nan;HE Yu-xin;ZHUANG Wen-hua;LI Long-guo;WANG Wei(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;College of Hydraulic and Hydroelectric Engineering,Sichuan University,Chengdu 610065,China;College of Water Science,Beijing Normal University,Beijing 100000,China)
出处
《中国农村水利水电》
北大核心
2019年第2期11-15,共5页
China Rural Water and Hydropower
基金
国家自然科学基金青年科学基金项目(51709190)
四川大学2016校青年启动基金(20826041A4222)
关键词
粉绿狐尾藻
净水效果
氮磷去除率
响应机制
Myriophyllum Verticillatum
purification effect
nitrogen and phosphorus removal rate
response mechanism
