Study on Nitrate Removal by Nano Zero Valent Iron Composite
Nano zero valent iron can quickly remove nitrate in water through chemical reduction.During the reaction,due to the strong agglomeration tendency of nano zero valent iron particles,the adsorption sites on the surface will be reduced,and the contact area with pollutants will be reduced,thus affecting the removal efficiency.In this paper,a new preparation method was used to load nano zero valent iron with carbon microspheres,which not only improved its stability,specific surface area and dispersion performance,reduced the occurrence of polymerization,but also adding precious metal nickel as catalyst could significantly improve the reduction efficiency of nitrate.The research showed that the supported nano zero valent iron nickel bimetallic composite had good removal efficiency of nitrate in water.Under the same conditions,after 90 min reaction,the removal rates of nitrate by Fe-Ni and Fe-Ni/AC were 78.68%and 86.78%,while the removal efficiency of nitrate by Fe-Ni/C was 99.29%.
Nano zero valent ironNitrateModificationLoadRemoval efficiency
NETL
NSTL
万方数据
维普
