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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2023, Vol. 42 ›› Issue (11): 3945-3954.

Special Issue: 资源综合利用

• Solid Waste and Eco-Materials • Previous Articles     Next Articles

Adsorption Performance of Seashell and Its Application Progress in Cement-Based Materials

WANG Dongli1,2, XIN Rui1, ZHAO Qingxin2, WU Donghui1, PAN Huimin2, YUAN Lili3   

  1. 1. College of Civil Engineering and Architecture, Northeast Petroleum University, Daqing 163318, China;
    2. Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste, Yanshan University, Qinhuangdao 066004, China;
    3. Research and Development Center, Shenzhen Guoyi Park Construction Co. Ltd., Shenzhen 518040, China
  • Received:2023-06-20 Revised:2023-08-05 Online:2023-11-15 Published:2023-11-22

Abstract: The use of seashells to replace traditional cement-based materials and study their adsorption capacity for pollutants can expand the functional engineering application range of cement-based materials. This paper first reviewed the principles of adsorption kinetics and adsorption isotherms to demonstrate the adsorption mechanism of seashell materials. Then the effects of pH value, contact time, pollutant concentration and other factors on the adsorption of heavy metal ions and basic dyes to seashells were discussed. Finally, the relevant applications of seashells in the construction field were reviewed. The results show that the experimental use of seashells instead of cementitious materials or natural aggregates in cement-based materials shows good adsorption capacity. The optimal pH value in the process of seashell adsorption is 5~7, the active site on the surface of seashell particles is limited, and that it would reach saturation at a certain concentration. The active site of seashell would increase with the decrease of particle size, so the seashell powder with small particle size is conducive to enhancing the absorption capacity and removal efficiency. By analyzing the adsorption performance of seashell and the applications of seashell in cement-based materials, this paper could provide ideas and methods for the design of functional cement-based adsorption materials from multiple angles.

Key words: seashell, cement-based material, heavy metal ion, dye, adsorption isotherm, adsorption kinetics

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