改性基层透水混凝土铺装路面对污染物的去除试验研究

发布时间：2018-01-10 07:41

本文关键词：改性基层透水混凝土铺装路面对污染物的去除试验研究　出处：《混凝土》2017年05期 　论文类型：期刊论文

【摘要】：通过使用人工模拟降雨装置和透水混凝土铺装路面,试验研究了透水混凝土铺装改性基层路面对径流污染物的削减情况。结果表明:在不同重现期下基层通过掺入膨润土并以沸石作为骨料后对COD、TP、TN、Cu、Zn、Pb的去除率分别为76.7%~86%、72.2%~84.1%、6%~7%、79%~82%、84%~85.5%、91%~93.8%,且随着重现期的增加,净化效果均减弱。在5年重现期下,改性基层透水混凝土铺装对径流污染物COD、TP、TN、Cu、Zn、Pb的削减效率较普通透水混凝土铺装分别提高了10%、9.5%、6%、13%、16.5%、20.6%。据分析,膨润土和沸石通过吸附作用、阳离子交换等官能团置换反应提升了对径流污染物的削减效果,为该种改性基层透水混凝土铺装路面的应用提供了理论依据。
[Abstract]:Through the use of artificial rainfall simulation device and permeable concrete pavement. The reduction of runoff pollutants in the modified base road of permeable concrete pavement was studied. The results showed that the soil was mixed with bentonite and zeolite was used as aggregate to treat CODTP at different recurrence periods. The removal rates of Zn ~ (2 +) Pb are 76.7U ~ (86) and 72.2%, respectively, and 85.5% of the 82.2% of the total amount of Zn ~ (2 +) ~ (2) is about 82.2%. The purification effect was weakened with the increase of the recurrence period. During the 5-year recurrence period, the modified base permeable concrete pavement was used to treat the runoff pollutant, COD, TPN and TNN Cu Zn. The reduction efficiency of Pb is 10% higher than that of ordinary permeable concrete pavement, 10% 9. 5% and 16. 5% and 20. 6% respectively. According to the analysis, bentonite and zeolite are adsorbed. The displacement reaction of functional groups such as cation exchange improves the reduction effect of runoff pollutants and provides a theoretical basis for the application of the modified basic course permeable concrete pavement.
【作者单位】：北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室;北京市规划委员会延庆分局;
【基金】：国家水体污染控制与治理科技重大专项(2010ZX07320-002)
【分类号】：U416.216
【正文快照】： 0引言随着雨水径流污染问题越来越凸显和城市内涝的频繁发生,具有削减城市径流、维持城市水循环和去除地表径流污染物作用的透水铺装已被广泛应用[1]。透水铺装系统结构从上至下依次为面层、基层(底基层)和垫层。由于面层组分不同,分为:透水混凝土、透水沥青、透水网格、透水

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