Ozone decomposition of 2-methylisoborneol (MIB) in adsorption phase on high silica zeolites with preventing bromate formation.
This work elucidates the applicability of our newly developed adsorptive ozonation process for the decomposition of 2-methylisoborneol (MIB), a typical taste and odor chemical, without the formation of possibly carcinogenic bromate ions. First, zeolite adsorbents were screened for their ability to adsorb MIB with a batch-type adsorption experimental apparatus and a flow-type decomposition experimental apparatus included an adsorbent-packed column. The USY zeolite with the highest silica to alumina ratio (SiO(2)/Al(2)O(3) molar ratio=70) showed the best performance as an adsorbent. Using this adsorbent, an ozonation experiment on an MIB solution including bromide ions was performed under various retention times using the flow-type apparatus. As a result, sufficient decomposition of MIB was achieved with preventing bromate formation.
Sagehashi
Masaki
M
Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan. sage@iis.u-tokyo.ac.jp
Shiraishi
Kenji
K
Fujita
Hirotaka
H
Fujii
Takao
T
Sakoda
Akiyoshi
A
D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry; D001959:Bromates / Q000737:chemistry; D001965:Bromides / Q000737:chemistry; D001892:Camphanes / Q000737:chemistry / Q000302:isolation & purification*; D009812:Odorants; D010083:Oxidants, Photochemical / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
D001959:Bromates; D001965:Bromides; D001892:Camphanes; D010083:Oxidants, Photochemical; D017680:Potassium Compounds; D014874:Water Pollutants, Chemical; D017641:Zeolites; C005536:2-methylisoborneol; D010126:Ozone; D012822:Silicon Dioxide; D000537:Aluminum Oxide; C039004:potassium bromide