Correlation between diurnal variation of purification effects and physiological characteristics of Nymphaea tetragona
Shanghai Key Laboratary of Urbanization and Ecological Restoration, College of Resources and Environmental Science, East China Normal University, Shanghai 200062, China)
Abstract： Based on field test method, hydroponic plant purifying-tanks were used to investigate the correlation between diurnal variation of black and malodorous river water purification and physiological characteristics of Nymphaea tetragona on a sunny day. The results indicate that with diurnal variation of light intensity, Chla, Chlb and SP contents of the leaves show doublepeak style at about 12:00 and 14:00, and POD and CAT activities of the roots show singlepeak style at about 13:00. Removal rate of CODCr, NH+4-N, TN, TP of plant purifyingtanks also show singlepeak style at 13:00. Chla, Chlb and SP contents of the leaves, POD and CAT activities of the roots have a significantly positive correlation with removal rate of CODCr, NH+4-N, TN, TP. Physiological characteristics of Nymphaea tetragona have a remarkable impact on the treatment ability of plant purifyingtanks.
2011, Vol. 32 
