LIMeng,SUNXin,GAO Feng,et al.Effect of Nanomaterials on Clogging Control of Permeable Brick[J].China Water & Wastewater,2023,39(19):125-131.
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Effect of Nanomaterials on Clogging Control of Permeable Brick

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第19期 Page: 125-131 Column: Date of publication: 2023-10-01
Author(s):
LI　Meng1;  SUN　Xin1;  GAO Feng2;  YANG Yu2;  WEI　Wen-qian1;  SUN　Zhe1;  CHENG　Zhi-wen3
（1. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Inner Mongolia Hydraulic Research Institute， Hohhot 010011， China； 3. Xianyang Research & Design Institute of Ceramics Co. Ltd.， Xianyang 712000， China）
Keywords:
ceramic permeable brick;  rainwater runoff pollutants;  mercury intrusion porosimetry;  nanomaterial;  clogging control
Abstract:
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 10-150 μm 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 50 μm on the surface of the permeable bricks to delay the clogging. The control effect of different surface loaded nanomaterials [hydrophilic titanium dioxide (n-TiO2) and nano-zinc oxide (n-ZnO)] on the clogging of the permeable bricks were compared. The hydrophilic n-TiO2 and n-ZnO both increased the permeability of the permeable bricks. Among them, the anatase hydrophilic n-TiO2 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.
Last Update: 2023-10-01