SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (1): 96-103.DOI: 10.1016/j.cjche.2017.04.011

• Separation Science and Engineering • Previous Articles     Next Articles

Adsorption characteristics of a novel ceramsite for heavy metal removal from stormwater runoff

Jianlong Wang1, Yuanling Zhao1, Pingping Zhang2,1, Liqiong Yang3, Huai'ao Xu1, Guangpeng Xi1   

  1. 1 Key Laboratory of Urban Stormwater System and Water Environment of the Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
    2 State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
    3 Jiuquan Environmental Monitoring Branch, Jiuquan 735000, China
  • Received:2017-01-16 Revised:2017-04-25 Online:2018-03-01 Published:2018-01-28
  • Contact: Jianlong Wang,E-mail address:wjl_xt@163.com
  • Supported by:

    Supported by the Training Project of Beijing Young Talents (2114751406), the Beijing Social Science Fund (15JGB052), and the Beijing Municipal Science and Technology Project (D161100005916004), Beijing outstanding talent project for excellent youth team (2015000026833T0000).

Adsorption characteristics of a novel ceramsite for heavy metal removal from stormwater runoff

Jianlong Wang1, Yuanling Zhao1, Pingping Zhang2,1, Liqiong Yang3, Huai'ao Xu1, Guangpeng Xi1   

  1. 1 Key Laboratory of Urban Stormwater System and Water Environment of the Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
    2 State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
    3 Jiuquan Environmental Monitoring Branch, Jiuquan 735000, China
  • 通讯作者: Jianlong Wang,E-mail address:wjl_xt@163.com
  • 基金资助:

    Supported by the Training Project of Beijing Young Talents (2114751406), the Beijing Social Science Fund (15JGB052), and the Beijing Municipal Science and Technology Project (D161100005916004), Beijing outstanding talent project for excellent youth team (2015000026833T0000).

Abstract: Urban sediments have rapidly increased in recent years around the world, and their effective management has become an important problem. To remove heavy metals from stormwater runoff and use sediments as a resource, a novel ceramsite was developed using sewer pipe sediments (SPS), river bed sediments (RBS), urban water supply treatment sludge (WSTS), and wastewater treatment plant excess sludge (WWTS). The optimal composition was determined based on the Brunauer-Emmett-Teller specific surface area and an orthogonal test design. The adsorption characteristics of the novel ceramsite for dissolved heavy metals (Cu2+ and Cd2+) were investigated through adsorption isotherms and kinetic experiments at (25±1)℃. Both Cu2+ and Cd2+ were effectively removed by the novel ceramsite, and their equilibrium adsorption was 4.96 mg·g-1 and 3.84 mg·g-1, respectively. Langmuir isotherms and a pseudo-first-order kinetic equation described the adsorption process better than other techniques. Characterization analysis of the ceramsite composition before and after heavy metal adsorption showed that the Cu2+ and Cd2+ contents in the ceramsite increased after adsorption. The results revealed that adsorption is both a physical and chemical process, and that ceramsite can be used as a bioretention medium to remove heavy metals from stormwater runoff while simultaneously converting problematic urban sediments into a resource.

Key words: Urban sediments, Ceramsite, Heavy metals, Stormwater runoff

摘要: Urban sediments have rapidly increased in recent years around the world, and their effective management has become an important problem. To remove heavy metals from stormwater runoff and use sediments as a resource, a novel ceramsite was developed using sewer pipe sediments (SPS), river bed sediments (RBS), urban water supply treatment sludge (WSTS), and wastewater treatment plant excess sludge (WWTS). The optimal composition was determined based on the Brunauer-Emmett-Teller specific surface area and an orthogonal test design. The adsorption characteristics of the novel ceramsite for dissolved heavy metals (Cu2+ and Cd2+) were investigated through adsorption isotherms and kinetic experiments at (25±1)℃. Both Cu2+ and Cd2+ were effectively removed by the novel ceramsite, and their equilibrium adsorption was 4.96 mg·g-1 and 3.84 mg·g-1, respectively. Langmuir isotherms and a pseudo-first-order kinetic equation described the adsorption process better than other techniques. Characterization analysis of the ceramsite composition before and after heavy metal adsorption showed that the Cu2+ and Cd2+ contents in the ceramsite increased after adsorption. The results revealed that adsorption is both a physical and chemical process, and that ceramsite can be used as a bioretention medium to remove heavy metals from stormwater runoff while simultaneously converting problematic urban sediments into a resource.

关键词: Urban sediments, Ceramsite, Heavy metals, Stormwater runoff