研究论文
陈桂珠,缪绅裕,黄玉山,谭凤仪.人工污水中的N在模拟秋茄湿地系统中的分配循环及其净化效果[J].环境科学学报,1996,16(1):44-50
人工污水中的N在模拟秋茄湿地系统中的分配循环及其净化效果
- ALLOCATION,CYCLE AND PURGED EFFECTS OF NUTRIENT POLLUTANT N IN ARTIFICIAL WASTEWATER IN SIMULATED KANDELIA CANDEL WETLAND SYSTEM
- 基金项目：香港科技大学研究基金,广东省科学基金
- 作者
- 单位
- 陈桂珠
- 中山大学环境科学研究所,广州 510275
- 缪绅裕
- 中山大学环境科学研究所,广州 510275
- 黄玉山
- 香港科技大学研究中心,香港
- 谭凤仪
- 香港城市理工学院应用科学系,香港
- 摘要：在温室中建立模拟红树林植物秋茄湿地系统,系统包括1年生秋茄苗、底泥和潮汐海水分别用正常、5倍和10倍浓度的人工制备的城市污水每周定时、定量对模拟系统污灌2次,持续1年,用以研究营养污染物N在系统中的分配循环及被净化的效果。结果表明,加入系统中的污水N主要留存在土壤中,留存在植物体中只有一小部分。4个处理污水浓度组植株中N元素的周转期依次为4.1年、4.9年、5.3年和4.3年,比20龄的秋茄群落N周期7年短,系统对污水N的净化效果随污水处理浓度增大而增大,有植物系统中,正常、5倍和10倍浓度污水处理组分别为23.50%、78.06%和83.88%;无植物系统中,对应组分别为21.60%、77.35%和82.01%.
- 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.
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