径流中氮和磷在生物滞留池中的迁移及去除机理  

Migration and Removal Mechanism of Nitrogen and Phosphorus of Surface Runoff in Bioretention Tank

作　　者：杨利伟[1] 张爽 杨周 窦妍[2] 胡博[1] 赵传靓 YANG Li-wei;ZHANG Shuang;YANG Zhou;DOU Yan;HU Bo;ZHAO Chuan-liang(School of Architectural Engineering, Chang'an University, Xi'an 710061 , China;Schoolof Environmental Science and Engineering, Chang' an University Xi'an 710054 , China;China Central South Municipal Design Institute Co. Ltd., Wuhan 430000, China)

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]长安大学环境科学与工程学院,陕西西安710054 [3]中国市政工程中南设计研究总院有限公司,湖北武汉430000

出　　处：《中国给水排水》2019年第9期133-138,共6页China Water & Wastewater

基　　金：陕西省住建厅科技攻关项目(214028170390)

摘　　要：生物滞留池是一种可以在源头控制地表径流污染物排放的措施。采用砂、土混合物(体积比为4:6)作为填料,研究了生物滞留池对地表径流中氨氮、硝态氮和总磷的去除效果,并采用CXTFIT2.0软件对试验结果进行模拟。另外,利用吸附试验对氨氮、硝态氮和总磷在生物滞留池中的去除机理进行了解析。结果表明,生物滞留池对氨氮、硝态氮和总磷的去除过程可以采用CXTFIT2.0软件进行模拟;氨氮、硝态氮和总磷穿透过程拟合出的阻滞系数(Rd)越大,生物滞留池对其去除效果越好,其中,对氨氮的去除效果最好(Rd=8),对总磷的去除效果较好(Rd=7),对硝态氮的去除效果极其有限(Rd=0.8);生物滞留池对氨氮和总磷的去除都是有利吸附,且以不均匀的吸附方式为主。Bioretention tank is a measure to control surface runoff pollutant discharge from the source. The removal effect of NH4^+- N, NO3^-- N and TP of surface runoff was investigated in a bioretention tank , which was filled with sand and soil mixture with a volume ratio of4 : 6. Moreover, the CXTFIT 2. 0 software was adopted to simulate the experimental results. The removal mechanism of TP, NH4^+-N and NO3^--N in the bioretention tank was analyzed by adsorption experiments. The results showed that the removal process of NH4^+- N, N03^-- N and TP in the bioretention tank could be simulated by CXTFIT 2. 0 software. The larger the retardation coefficient ( Rd ) fitted by penetration process of NH;- N, N03^- N and TP, the better the removal effect of NH;- N, N03^--N and TP could be obtained in the bioretention tank. Among them, the removal effect of NH4^+- N was the best (Rd=8), and the removal effect of TP was better when Rd was equal to 7 , while the removal effect of NO3^-- N was extremely limited when the optimal Rd was 0. 8. The removal of NH4^+- N and TP in the bioretention tank were both effective adsorption, which were mainly uneven adsorption.

关 键 词：生物滞留池 地表径流 氮 磷 CXTFIT软件 阻滞系数 去除机理 

分 类 号：TU992[建筑科学—市政工程]