Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 42, Issue 7, Pages 1447-1463Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496390701289948
Keywords
adsorption; high silica zeolite; nitrobenzene; organic pollutants; ozonation; refractory compounds; wastewater
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This work investigates the removal of nitrobenzene (NB), a model pollutant from water, by combining adsorption onto zeolites and regeneration with ozone. The adsorption equilibrium isotherms of NB onto zeolites enabled the best adsorbent to be selected and zeolites with a high Si/Al ratio were the most efficient. The adsorption capacity depended on the Si/Al ratio and on the pore size. In a sequential process coupling adsorption and oxidation by ozone, NB was completely removed from water and the initial adsorption capacity of the zeolite was totally restored. Although no catalytic effect was noticed, the adsorption produced locally high concentrations, thus enhancing the oxidation rate for NB.
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