The Fe2+/O2/sodium tripolyphosphate(STPP)advanced oxidation system was constructed to investigate the ability of active radical generation and pollutant degradation under the conditions of continuous aeration and limited dissolved oxygen by aeration and fixed initial DO experiments,respectively.The results showed that under full aeration at a flow rate of 150mL/min,when the concentration of Fe2+-STPP increased from 3mmol/L to 20mmol/L,the production of hydroxyl radicals under neutral conditions increased from 0.185mmol/L to 0.256mmol/L,and the removal rate of phenol increased from 81.4％to 91.5％.When the initial DO concentration was fixed in the confined environment and the Fe2+-STPP concentration was sufficient,the conversion of O2 to HO·was about 10.60％～1 8.05％,and the conversion rate increased with the increase of DO concentration.The amounts of the cumulative HO·produced and the consumed reducing agent Fe2+were quantified,and the response relationship between the amount of pollutants degraded and the initial DO concentration was clarified,and their linear correlation equation was also established(R2＞0.99).
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