摘要
为了探究雨水径流中有机污染物对透水砖堵塞的影响,采用仅含无机颗粒物的雨水径流(PSS径流)和包含无机颗粒物及有机污染物的雨水径流(P径流),考察了透水砖的堵塞特性,分析了堵塞颗粒物粒径和透水砖孔径的关系。结果表明,雨水径流中的有机污染物加剧了透水砖堵塞的速度和程度,粒径为10~150μm的颗粒物是引发堵塞的主要颗粒物,合理减少透水砖表层大于50μm孔径的比例对延缓堵塞有重要意义。采用亲水性纳米二氧化钛(n-TiO2)和纳米氧化锌(n-ZnO),对比研究了不同表面负载纳米材料对透水砖堵塞的控制效果,结果显示,n-TiO2和n-ZnO均可提高透水砖的渗透性能,其中锐钛矿型亲水性n-TiO2的效果最佳,在不进行清扫维护的情况下,整个生命周期内的透水量是未负载组的1.52倍,参照西安市降雨条件和70%降雨就地消纳的建设要求,可使透水砖有效寿命延长1.41年。
The rainwater runoff containing inorganic sediments(Pss runoff)and rainwater runoff containing inorganic particles and organic pollutants(P runoff)were employed to investigate the clogging characteristics of permeable brick,and the relationship between the size of the particles from the runoff and the pore size of the permeable brick was analyzed,so as to explore the effect of organic pollutants in rainwater runoff on the clogging of permeable brick.The organic pollutants in rainwater runoff aggravated the speed and degree of clogging of the permeable brick,and the sediments with particle size of 10-150μm were the main particles causing the blockage of the permeable brick.Therefore,it was of great significance to appropriately reduce the proportion of pore size above 50μm on the surface of the permeable bricks to delay the clogging.The control effect of different surface loaded nanomaterials[hydrophilic titanium dioxide(n-TiO_(2))and nano-zinc oxide(n-ZnO)] on the clogging of the permeable bricks were compared.The hydrophilic n-TiO_(2),and n-ZnO both increased the permeability of the permeable bricks.Among them,the anatase hydrophilic n-TiO_(2),demonstrated the best performance.Without cleaning and maintenance,the permeable capacity during the whole life cycle was 1.52 times that of the permeable bricks unloaded with nano materials.The effective life of the permeable brick would be increased by 1.41 years when it was applied in the rainfall conditions in Xi'an to achieve the requirement of 70% rainfall detention on the spot.
作者
李盟
孙昕
高峰
杨宇
位文倩
孙哲
成智文
LI Meng;SUN Xin;GAO Feng;YANG Yu;WEI Wen-qian;SUN Zhe;CHENG Zhi-wen(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Inner Mongolia Hydraulic Research Institute,Hohhot 010011,China;Xianyang Research&Design Institute of Ceramics Co.Ltd.,Xianyang 712000,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第19期125-131,共7页
China Water & Wastewater
基金
内蒙古自治区水利科技项目(NSK202002)
“十三五”国家重点研发计划项目(2016YFC0701001-02)。
关键词
陶瓷透水砖
雨水径流污染物
压汞法
纳米材料
堵塞控制
ceramic permeable brick
rainwater runoff pollutants
mercuryintrusion porosimetry
nanomaterial
clogging control
