摘要
针对水体富营养化和重金属复合污染的问题，选用蕹菜，俗名空心菜（Ipollzoea aquatica）作为浮床植物，设置五组不同富营养化水平与重金属Cd、Cr复合污染的水体，研究蕹菜浮床技术修复的效果。结果发现水体总磷、总氮、硝氮、氨氮等含量均明显降低，Cd和Cr含量也有效下降。相对对照组，总磷、总氮、硝氮、氨氮、Cd和Cr去除率提高值分别为19．8％～8．6％、26．1％～13．7％、33．9％～8．6％、21．1％～13．2％、53．6％～41．6％、35．8％-16．5％。蕹菜浮床修复效果明显，并且Cd的去除率提高值与富营养化程度呈正相关性，其余都是富营养化越严重，提高值越低。
To solve the combined polluted water body with eutrophication and heavy metals,water spinach( also known as Ipomoea aquatica) was selected as a floating bed plant in this study. The removal efficiency of water spinach floating bed technology was analyzed in five groups of different eutrophication levels and combined polluted water bodies with heavy metals Cd and Cr. The results showed that the contents of total phosphorus,total nitrogen,nitrate nitrogen,ammonia nitrogen were significantly decreased,and the contents of Cr and Cd were also decreased effectively. Compared with the control groups,the increased removal rates of total phosphorus,total nitrogen,nitrate nitrogen,ammonia nitrogen,Cd and Cr were 19. 8% ~ 8. 6%,26. 1% ~ 13. 7%,33. 9% ~ 8. 6%,21. 1% ~ 13. 2%,53. 6% ~ 41. 6%and 35. 8% ~ 16. 5% respectively. The removal efficiency of water spinach floating beds was significant. Besides,the increased removal rate of Cd was positively correlated to the eutrophication level,and the increased removal rates of rest pollutants were inversely proportional to the eutrophication level.
出处
《环境影响评价》
2016年第1期79-83,共5页
Environmental Impact Assessment
基金
武汉市国际科技合作计划项目(2014030709020314)
湖北省科技支撑计划项目(2014BBA163)
湖北省农业科技创新中心项目(2016-620-007-001)
关键词
蕹菜
浮床
富营养化
重金属
water spinach
floating beds
eutrophication
heavy metal
