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环境科学学报 1996
ALLOCATION,CYCLE AND PURGED EFFECTS OF NUTRIENT POLLUTANT N IN ARTIFICIAL WASTEWATER IN SIMULATED KANDELIA CANDEL WETLAND SYSTEM
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Abstract:
A simulated mangrove wetland was set up in a greenhouse. The system consisted of three subsystems, the one-year old seedlings of Kandelia candel , sediment and tidal water(the artificial seawater cycled as tide by pumping).The artificial wastewater of three different concentrations,namely Cp1,and Cp10 and artifical seawater(control)of 1.5% salinity had been discharged into the wetland in fixed quantity twice a week for a year.The property of Cp1 was similar to that of domestic wastewater while Cp5 and CP10 contained five and ten times of the nutrients and heavy metals found in nitrogen wastewater,respectively. The results showed that the total nitrogen in artificial wastewater discharged to the system remained mainly in soil with a small portion entered into the seedling subsystem. The cycle time of nitrogen uptaken by seedlings was about 5 years.The N purifying rates of the wetland systems for normal,five times and ten times of concentration of artificial wastewater were 23.50%,78. 06%,and 83. 88%, respectively.