摘要
为提高生物滞留系统氮素去除效果,推动黄土分布区海绵城市建设,研究了改良黄土填料对生物滞留系统雨水径流氮素去除效果。试验采用室内土柱物理模型试验,设置了T(黄土)、TS(60%黄土+40%沙)、TSF(42%黄土+28%沙+30%粉煤灰)、TSG(42%黄土+28%沙+30%钢渣)、TSC(42%黄土+28%沙+30%赤泥)5种生物滞留系统填料,研究了其对模拟雨水径流的总量控制和氮素去除效果。结果表明,添加河沙、钢渣和赤泥有助于提高系统的径流总量控制率,其中TS系统径流总量控制率最高,且随运行时间增加而增大,最高可达95.79%;黄土中添加河沙、粉煤灰和赤泥后系统对雨水径流NH_(4)^(+)-N的去除率影响不显著,去除率较高且均在80%以上,而添加钢渣后,系统对NH_(4)^(+)-N的去除率显著降低,平均去除率仅为41.18%;添加钢渣不利于系统对NO_(3)^(-)-N的去除,平均去除率仅为32.06%,添加赤泥的TSC系统对NO_(3)^(-)-N的去除率最高,平均去除率为91.42%。
In order to improve the nitrogen removal effect of the bioretention system and promote the construction of sponge cities in the loess distribution area,removal effect of nitrogen in rain runoff by the loess media-improved bioretention systems were studied.Setting five kinds of fillers including T(loess),TS(60%loess+40%sand),TSF(42%loess+28%sand+30%fly ash),TSG(42%loess+28%sand+30%steel slag),TSC(42%loess+28%sand+30%red mud),physical model test of soil column in laboratory was used to study their total volume control and nitrogen removal effects on simulated rain-runoff.The results show that adding sand,steel slag and red mud can improve the total runoff control rates of the system,and TS system was the highest,and increased with the increase of operation time,up to 95.79%;Adding sand,fly ash and red mud in loess,the removal rates of NH_(4)^(+)-N were not significantly influenced,and the removal rates were high and all were above 80%;But after adding steel slag,the removal rate decreased significantly,and the average removal rate was only 41.18%;Adding steel slag decreased the removal of NO_(3)^(-)-N,the average removal rate was only 32.06%;While adding red mud the removal rate was the highest,and the average removal rate was 91.42%.
作者
赵凡
王洪浩
李京玲
薛恬鑫
姚瑶
ZHAO Fan;WANG Hong-hao;LI Jing-ling;XUE Tian-xin;YAO Yao(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《水电能源科学》
北大核心
2022年第9期74-78,共5页
Water Resources and Power
基金
山西省自然基金项目(201901D111059)
国家自然科学基金青年基金项目(51409184)
山西省青年科技研究基金项目(201601D202070)。
关键词
生物滞留系统
氮素
径流总量控制
黄土
雨水径流
bioretention system
nitrogen
total runoff volume control
loess
rain-runoff
