Phase behavior of TXs/toluene/water microemulsion systems for solubilization absorption of toluene.
Triton Xs (TXs) surfactants/cosurfactant/water/oil (toluene) microemulsion systems for enhancing toluene solubilization were proposed and its potential was investigated for toluene removal from gas stream. The results indicated that TX-100 was superior to other TXs surfactants in removing toluene without cosurfactant. The efficiency of cosurfactants for improving toluene solubilization capacity follows the order: amine > alcohol > acid. According to the factor analysis, the linear cosurfactants are better than the branched ones. The effects of hydrophile-lipophile balance (HLB), salt (NaCl) concentration and temperature on the formation of microemulsion system were also discussed. The results suggested that the optimum value of HLB was 15, the effect of NaCl concentration on the system was inconspicuous and the lower temperature enhanced the solubilization capacity. Nonionic surfactant-based microemulsions had a significant absorption enhancement for toluene, indicated by as much as 82.72% of toluene in phase composition diagram, which will have a great prospect in air pollution treatment.
Liu
Lian
L
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China. liulianwin@yahoo.com.cn
Tian
Senlin
S
Ning
Ping
P
D000042:Absorption; D015394:Molecular Structure; D054712:Salinity; D012965:Sodium Chloride / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D014050:Toluene / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D014050:Toluene; D012965:Sodium Chloride