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Decomposition of Acetone by Hydrogen Peroxide/Ozone Process in a Rotating Packed Contactor
Author(s) -
Ku Young,
Huang YunJen,
Chen HuaWei,
Hou WeiMing
Publication year - 2011
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143010x12851009156961
Subject(s) - ozone , hydrogen peroxide , acetone , decomposition , chemistry , contactor , aqueous solution , reaction rate constant , aqueous two phase system , solubility , radical , inorganic chemistry , organic chemistry , kinetics , thermodynamics , power (physics) , physics , quantum mechanics
The direct use of ozone (O 3 ) in water and wastewater treatment processes is found to be inefficient, incomplete, and limited by the ozone transfer between the gas‐liquid interface because of its low solubility and instability in aqueous solutions. Therefore, rotating packed contactors were introduced to improve the transfer of ozone from the gaseous phase to the solution phase, and the effect of several reaction parameters were investigated on the temporal variations of acetone concentration in aqueous solution. The decomposition rate constant of acetone was enhanced by increasing the rotor speed from 450 to 1800 rpm. Increasing the hydrogen peroxide (H 2 O 2 )/O 3 molar ratios accelerated the decomposition rate until a certain optimum H 2 O 2 /O 3 molar ratio was reached; further addition of H 2 O 2 inhibited the decomposition of acetone, possibly because excessive amounts of H 2 O 2 added might serve as a scavenger to deplete hydroxyl free radicals.