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The Adsorption Capacity of the Base Layer of Pervious Concrete Pavement Prepared with Additives for Typical Runoff Pollutants


Affiliations
1 Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2 Beijing Yanqing Municipal Commission of Urban Planning, Beijing 102100, China
 

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.
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  • The Adsorption Capacity of the Base Layer of Pervious Concrete Pavement Prepared with Additives for Typical Runoff Pollutants

Abstract Views: 513  |  PDF Views: 117

Authors

Wang Junling
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Wei Jiangtao
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Wang Xueming
Beijing Yanqing Municipal Commission of Urban Planning, Beijing 102100, China
Feng Cuimin
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Chen Tao
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Sun Lihua
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Li Junqi
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Abstract


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.

References





DOI: https://doi.org/10.18520/cs%2Fv114%2Fi02%2F378-384