环境工程学报2016，Vol.10Issue(10)：5440-5446,7.DOI:10.12030/j.cjee.201505151
5种水生植物的脱氮除磷效果及其对水体胞外酶活的影响
Efficiency of removing nitrogen and phosphorous and effects on extracellular enzyme activity in water body by five hydrophytes
摘要
Abstract
To investigate the role of hydrophytes in the purification of eutrophic water bodies,Trapa quadrispinosa Roxb.,Eichhornia crassipes,Hydrocharis dubia (Bl.) Backer,Ipomoea aquatica Forsk,and Lemna minor L.were planted in treated water to compare their effects on purification and their influence on extracellular enzyme activity.The results showed that all hydrophytes performed well during the purification process.For total nitrogen (TN),the order of removal efficiency was Eichhornia crassipes (81.6％) ＞ Ipomoea aquatica Forsk (72.2％) ＞ Hydrocharis dubia (Bl.) Backer (68.4％) ＞ Trapa quadrispinosa Roxb.(65.8％) ＞ Lemna minor L.(60.2％),and for total phosphorous (TP) removal,the order was Eichhornia crassipes (95.0％) ＞ Ipomoea aquatica Forsk (89.7％) ＞ Hydrocharis dubia (Bl.) Backer (78.4％) ＞ Trapa quadrispinosa Roxb.(77.3％) ＞ Lemna minor L.(70.5％).All five hydrophytes could enhance the activity of extracellular enzymes,and the treatment involving E.crassipes showed the maximum range and peak urease activity (UA) and alkaline phosphatase activity (APA).The range and peak UA were 19.70 μg · mL-1 and 10.33 μg · mL-1,respectively,and for APA,they were 8.12 μg · mL-1 and 5.95 μg · mL-1.The range and peak UA and APA for Ipomoea aquatica Forsk were the next highest.UA and APA were significantly negatively correlated with the concentrations of both NH4-N and dissolved active phosphorus (SRP),and the correlations were between-0.853 and-0.992 and -0.813 and-0.994,respectively.Eichhornia crassipes and Ipomoea aquatica Forsk may work better than Trapa quadrispinosa Roxb,Hydrocharis dubia (Bl.) Backer and Lemna minor L.,and have potential for application in the purification of eutrophic water bodies.关键词
水生植物/脱氮除磷/胞外酶Key words
hydrophyte/removal of nitrogen and phosphorus/extracellular enzyme分类
资源环境引用本文复制引用
汪文强,王子芳,高明..5种水生植物的脱氮除磷效果及其对水体胞外酶活的影响[J].环境工程学报,2016,10(10):5440-5446,7.基金项目
国家科技支撑计划项目(2012BAD14B18) （2012BAD14B18）
