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Xueming, Wang
- The Adsorption Capacity of the Base Layer of Pervious Concrete Pavement Prepared with Additives for Typical Runoff Pollutants
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Authors
Affiliations
1 Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, CN
2 Beijing Yanqing Municipal Commission of Urban Planning, Beijing 102100, CN
1 Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, CN
2 Beijing Yanqing Municipal Commission of Urban Planning, Beijing 102100, CN
Source
Current Science, Vol 114, No 02 (2018), Pagination: 378-384Abstract
Additives were added to pervious concrete pavement to improve the removal capacity for runoff contaminants. In this study, static isothermal adsorption experiments were conducted for concrete prepared with fly ash or bentonite. The results showed that the material containing bentonite showed better adsorption capacity for runoff contaminants. The saturated adsorption values of bentonite for major runoff pollutants, including chemical oxygen demand (COD), total phosphorus (TP) and copper (Cu) were 8.61, 6.93, 19.31 mg/g respectively. However, the two additives showed only weak adsorption capacity for total nitrogen (TN). Compared to hardened cement, the adsorption capacity for COD, TP and Cu of the cement with bentonite was increased by 54%, 30% and 42% respectively, and the capacity of cement with fly ash increased by 42%, 11% and 33% respectively. Therefore, additives can improve the decontamination capacity of the base layer of the pervious concrete pavement. This study provides technical support for the construction of a sponge city.Keywords
Adsorption, Base Layer, Optimization, Pervious Concrete Pavement.Full Text
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