Ezperimental Research On Tracing Degradation Principle Of Leachate 15N
Simulated semi-aerobic landfill equipment and anaerobic landfill equipment (CK) were installed, and the in-situ trace experiment based on the 15N isotope technique was carried out. The two equipments were respectively added with 4 g standard 15NH4Cl tracer(the abundance of 15N is 99.6％), and leachate samples at the bottom of the equipments were taken at 20 h，44 h，68 h, 116 h and 188 h after the tracer was added, to detect the concentration of total nitrogen (TN) and the abundance of 15N of TN. The migration rules of extraneous source 15N during the semi-aerobic and anaerobic landfilling process in the leachate, and the dynamic degradation principles of nitrogen element in both complicated nitrogen pool treating system were discussed. Results showed that, dilution factor (xi) of extraneous source 15N of the semi-aerobic treatment nitrogen pool at 20 h,44 h, 68 h，116 h and 188 h was attenuated in turn, and xi of those of anaerobic treatment nitrogen pool after 20 h, 44 h, 68 h and 116 h was also attenuated in turn, while the values of xi at 116 h and 188 h was equal. Contents of 15TN (mi) in the bottom leachate of both treating pools and the percentage yi that mi occupies in TN（Mi,1042.54/ xi）of the nitrogen pool were augmented with the time lapse of anaerobic treatment were both obviously larger than those of corresponding semi-aerobic treatment at each monitoring time point, while xi showed an opposite rule. Semi-aerobic treatment could reach a migration and transfer balance and a stable degradation status of the system earlier than the anaerobic treatment, and the average variation speeds of mi and xi of semi-aerobic treatment were obviously larger than those of the anaerobic treatment under these balance status, the variation rate of mi and xi of the anaerobic treatment were very small (near zero) or equal to zero.
landfill leachate 15N trace technology degradation principle
PANG Xiang-rui HUANG Qi-fei WANG Qi WANG Qun-hui
School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin,China Resear Research Institute of Solid Waste Management Chinese Research Academy of Environmental Science Beiji Civil and Environment Engineering School University of Science and Technology of Beijing Beijing,Chi
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）