Decontamination performance and cleaning characteristics of three common used paved permeable bricks
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RESEARCH ARTICLE
Decontamination performance and cleaning characteristics of three common used paved permeable bricks Suhua Han 1 & Ye Yang 1 & Shuang Liu 1 & Minbo Lu 1 Received: 2 May 2020 / Accepted: 16 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract To investigate the effectiveness of different permeable bricks on the pollutants from urban rainfall runoff, three common used bricks (ceramic brick, cement brick, and steel slag brick) were selected and applied to study their decontamination performance. The influencing factors such as rainfall intensity and contaminant concentrations were investigated. Then the ultrapure water was used to wash the permeable brick to research the pollution status and cleaning characteristics by monitoring the water quality of the rinsing water. Suspended solids (SS), chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphorus (TP), and heavy metals (Cu, Zn, Pb, and Cd) in the influent and effluent were measured. The results showed the following: (I) The upper layer of the brick may play a more critical role in purification process; the uniform and dense pore distribution of ceramic permeable brick was instrumental in the retention of particulates. (II) Contaminant concentration and rainfall intensity had a great influence on pollutants with lower removal rate and had little effect on pollutants with higher removal rate. (III) Non-sintered bricks containing a certain amount of cement increased the pH after filtration. (IV) The removal performance of permeable brick for dissolved pollutants such as COD, NH4-N, and TN was inferior to that for SS, TP, and heavy metals since the discrepancy in removal mechanism of pollutants. The study could offer a new perspective for the decontamination research of pervious bricks. Keywords Permeable brick . Rainfall intensity . Contaminant concentrations . Decontamination . Cleaning characteristics
Introduction In recent years, permeable pavements have become one of the most frequently used low impact development (LID) techniques (Hernandez-Crespo et al. 2019; Liu et al. 2019; Rahman et al. 2015; Kia et al. 2019). This infiltration-based technology consists of structural layers with relatively high porosity to allow rainwater to pass through its surface and underlying layers, including a permeable pavement surface, aggregate subbases, and sometimes includes geotextiles and underdrains, and eventually infiltrate into the natural soil or discharge into a drainage system (Imran et al. 2013; Kuruppu et al. 2019; Chandrappa and Biligiri 2016).
Responsible Editor: Philippe Garrigues * Minbo Lu [email protected] 1
CCDI (Suzhou) Exploration & Design Consultant CO., Ltd., Suzhou, Jiangsu, China
In addition to good hydrological effect in reducing runoff, delaying peak flow, increasing infiltration rate, and recharging the ground water (Rowe et al. 2010; Newman et al. 2014; Fassman and Blackbourn 2015; Collins et al. 2010; Brown and Borst 2014), permeable brick paving system (PPS) a
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