Five cycles of SO2absorption and desorption experiments were performed

using basic aluminum sulfate solution with design aluminum content and alkalinity of 30g/L and 30%

respectively.The variations of such parameters as SO42-concentration

SO32-concentration

pH value and absorption rate of basic aluminum sulfate solution against the absorption cycle frequency were investigated.Moreover

factors affecting the SO2cyclic absorption performance using basic aluminum sulfate regeneration method were discussed.The results show that

within the initial ten seconds

after five cycles' absorption

the short-time absorption rate of basic aluminum sulfate to SO2was still able to achieve more than 95%.The absorption rate decreased with an increase in initial concentration of SO32-and SO42-

and increased with the pH value.When the initial concentration of SO32-and SO42-

and the pH value was within range of 0-0.023mol/L

0.60-0.67mol/L

and 3.51-3.62

respectively

the absorption rate can maintain at 95% or higher.