Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection of PR China, Nanjing, Jiangsu 210042, PR China.
Waste Manag. 2013 May;33(5):1229-36. doi: 10.1016/j.wasman.2013.02.008. Epub 2013 Mar 7.
This is the first attempt to report the gaseous nitrogen emissions from landfill leachate filtration methods by irrigating the aged refuse. A first-order reaction model was a good fit for the increase in ammonia emissions from aged refuse, clay and sandy soil incubated for 120 h after adding the leachate-N solution. The emissions of ammonia and N2O by the three experimental materials fit well to first-order and zero-order models, respectively. The maximum ammonia emission from aged refuse was approximately 1.17 mg NH4(+)-Nkg(-1) d.w. and the calculated emission factor was 1.95‰, which was 3.76 and 2.67 times lower than that of sandy and clay soils, respectively. The tendencies of NH4(+)-N nitrification and NO3(-)-N generations fit well to the zero-order reaction model and the net nitrification rate by the aged refuse was 1.30 (p<0.05) and 1.71 (p<0.05) times that of clay soil and sandy soil, respectively. At the same time, the net NO4(-)-N generation rate by the aged refuse was 1.56 (p<0.05) and 2.33 (p<0.05) times that of clay soil and sandy soil, respectively. The quantity of nitrogen emitted by aged refuse as N2O was 2.46 times greater than that emitted as ammonia. The emission factor for N2O from aged refuse was 8.28 (p<0.05) and 16.11 (p<0.05) times greater than that of clay and sandy soils, respectively. For the leachate irrigation, N2O emissions should be of greater concern than ammonia emissions.
这是首次尝试报告通过灌溉老龄废物来从垃圾渗滤液过滤方法中排放气态氮。老龄废物、粘土和沙土在添加渗滤液-N 溶液 120 h 后培养时，氨排放的一级反应模型很好地适用于氨氮的增加。三种实验材料的氨和 N2O 排放均很好地符合一级和零级模型。老龄废物的最大氨排放量约为 1.17 mg NH4(+)-Nkg(-1) d.w.，计算得出的排放因子为 1.95‰，分别比沙土和粘土低 3.76 倍和 2.67 倍。NH4(+)-N 硝化和 NO3(-)-N 生成的趋势很好地符合零级反应模型，老龄废物的净硝化速率分别比粘土和沙土高 1.30（p<0.05）和 1.71（p<0.05）倍。同时，老龄废物的净 NO4(-)-N 生成速率分别比粘土和沙土高 1.56（p<0.05）和 2.33（p<0.05）倍。老龄废物以 N2O 形式排放的氮量比以氨形式排放的氮量高 2.46 倍。老龄废物的 N2O 排放因子分别比粘土和沙土高 8.28（p<0.05）和 16.11（p<0.05）倍。对于渗滤液灌溉，N2O 排放应比氨排放更受关注。
