Effects of Adsorbents on Performance of Water Purifying Pervious Concrete
ZHAO Haojie
WANG Yang
CAO Ruilin
XU Lingling
Abstract：By incorporating low-viscosity chitosan-modified diatomite and palygorskite adsorbents,pervious concrete with water purification capability was prepared.After clarifying the influence of chitosan doping ratio on the Cu²⁺removal rate and unit adsorption capacity of the modified diatomite and palygorskite,further studies were conducted on the effects of adsorbent dosage on the removal rates of ammonia nitrogen(NH4-N)and Cu²⁺,water permeability and compressive strength of pervious concrete.The results show that compared to unmodified adsorbents,the Cu²⁺unit adsorption capacities of chitosan-modified diatomite and palygorskite(mass ratio is 1∶12)are increased by 1.2 times and 2.2 times,respectively.The incorporation of modified adsorbents into pervious concrete not only improves the pore structure but also significantly enhances the removal effects of NH4-N and Cu²⁺.Although the compressive strength slightly decreases with the increase of modified adsorbent dosage,it can still meet the minimum grade requirements of pervious concrete under the appropriate dosage,and can effectively improve its water permeability.
Keywords：pervious concreteadsorption propertywater purification propertymechanical property
Publication Date：2025-12-30
Online Publishing Date：2026-01-08(First online date of this platform, not the publication date of the document)
Pages：8( 1266-1273 )