北京市河流氨氮浓度时空演变特征分析  

The Spatial and Temporal Evolution of Ammonia Concentration in Rivers of Beijing

作　　者：田颖 郭婧[1] 梁云平[1] 刘京[2] 荆红卫[1] TIAN Ying;GUO Jing;LIANG Yunping;LIU Jing;JING Hongwei(Beijing Municipal Environmental Monitoring Center,Beijing 100048,China;State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring,China National Environmental Monitoring Centre,Beijing 100012,China)

机构地区：[1]北京市环境保护监测中心,北京100048 [2]中国环境监测总站,国家环境保护环境监测质量控制重点实验室,北京100012

出　　处：《中国环境监测》2020年第1期75-81,共7页Environmental Monitoring in China

基　　金：北京市科技重大专项(No.Z181100005518009)

摘　　要：选取2010—2017年北京市地表水监测数据,对河流氨氮(NH 3-N)浓度的时空演变特征进行分析。结果显示,空间上,全市河流NH 3-N浓度整体上保持上游优于下游的分布特征;年均浓度显著下降,由2010年的8.53 mg/L逐年下降至2017年的3.09 mg/L;河流NH 3-N浓度与化学需氧量、总磷呈显著正相关,与溶解氧显著负相关,总氮与NH 3-N的比值随着水质由差到好呈上升状态。污水收集处理和再生水利用是改善北京市河流水质的关键措施。为持续降低河流NH 3-N浓度,改善首都水环境质量,须提高污水处理能力和出水水质,有机结合再生水回用与生态治水理念。Surface water Monitoring data from 2010 to 2017 were used to analyze the spatial and temporal evolution of ammonia(NH3-N) concentration in rivers of Beijing. Results indicated that rivers in upstream had lower NH3-N concentrations than that in downstream. From 2010 to 2017,the annual average concentration of NH3-N decreased significantly from 8. 53 mg/L to 3. 09 mg/L. Whats more,NH3-N had positive correlation with chemical oxygen demand(COD) and total phosphorus(TP)significantly,while negative correlation with dissolved oxygen(DO). The better condition of water quality,the higher ratio of TN/NH3-N correspondingly. Based on the results of above analysis,wastewater treatment and the reuse of reclaimed water played important roles in water quality improvement. Therefore,in order to continue decreasing NH3-N concentration and improving water quality in Beijing,the total amount of NH3-N emission should be strictly controlled from the aspect of wastewater treatment capacity and effluent quality,and the reclaimed water be reused with ecological method.

关 键 词：氨氮 时空变化 相关性分析 污水处理 再生水 

分 类 号：X824[环境科学与工程—环境工程]