摘要
以北方地区典型一般透水型含水层介质为研究对象,通过试验获取了垃圾渗滤液特征污染物COD和氨氮在含水层介质中的吸附系数,研究了含水层介质粒径大小、有机质含量和污染物化学特性对吸附能力的影响。结果表明:场地典型含水层介质对COD的吸附系数为0.32~5.87 L/kg,对氨氮的吸附系数为3.05~5.97 L/kg;含水层介质对COD和氨氮的吸附曲线均符合线性等温吸附曲线;含水层介质粒径大小与其对COD和氨氮的吸附能力均成正比;含水层介质的有机碳含量与其对COD的吸附能力成正比,但对氨氮吸附能力影响不显著;氨氮在含水层介质中的自然吸附衰减作用较COD强,即氨氮在含水层中的迁移性低于COD。
The typical pervious aquifer medium in northern China was taken as the research object.The adsorption coefficients of COD and ammonia nitrogen of the landfill leachate characteristic pollutants in the aquifer medium were obtained through experiments.The effects of particle size,organic matter content and pollutant chemical characteristics of aquifer medium on adsorption capacity were studied.The results showed that,the adsorption coefficient of COD to typical aquifer medium in the site was 0.32~5.87 L/kg,and the adsorption coefficient of ammonia nitrogen was 3.05~5.97 L/kg.The adsorption curves of COD and ammonia nitrogen in aquifer medium accorded with the linear isotherm adsorption curve.The particle size of aquifer medium was proportional to its adsorption capacity for COD and ammonia nitrogen.And the content of organic matter in aquifer medium was proportional to its adsorption performance for COD,but has no significant effect on the adsorption performance of ammonia nitrogen.The natural absorption attenuation of ammonia nitrogen in the aquifer medium was stronger than that of COD,namely that the migration of ammonia nitrogen in the aquifer was lower than COD.
作者
吴晓芳
周宏磊
韩华
李厚恩
Wu Xiaofang;Zhou Honglei;Han Hua;Li Houen(BGI Engineering Consultants Ltd.,Beijing 100038;The Environmental Geotechnical Engineering Technology Research Center of Beijing,Beijing 100038)
出处
《环境卫生工程》
2020年第5期68-72,共5页
Environmental Sanitation Engineering
基金
国家重点研发计划项目(2018YFC1802301)。
关键词
吸附衰减
氨氮
COD
含水层介质
adsorption attenuation
ammonia nitrogen
COD
aquifer medium
