Source Water Environment Hormone - The Degradation Of Phthalate Esters

There is phthalic acid esters(PAEs) in micro-polluted source water. If the sourcewater is used as drinking water source, the PAEs may stock in human's body, causechronic hazard, especially reproductive toxicology.Low-concentration PAEs solution is our research subject. SPME-GC-MS is appliedas analyze method. The suitable degradation method and the factors that affectdegradation are found. First, the degradation method of DBP with a concentration of1mg/L is studied. Single ozonation is compared with UV/H₂O₂/O₃, and then confirmedthat by using the method of UV/H₂O₂/O₃, higher degradation rate can be achieved. Thedegradation rate in 1 hour is 98.9%. The best degradation condition is: aerate O₃continuously, the concentration of H₂O₂ is 30mg/L, the initial pH of the solution is 8.Then the mixed solution which is composed of DMP,DEP,DBP 1mg/L, DEHP 0.4mg/Lwas researched on, compared single ozonation with UV/H₂O₂/O₃ method. By using themethod of UV/H₂O₂/O₃, not only high degradation rate was achieved, but also highmineralization degree was achieved. The degradation rate in 1 hour is 98.9%, themineralization degree is 81.2%. The best degradation condition is. aerate O₃continuously, he concentration of H₂O₂ is 60mg/L, the initial pH of the solution is 8.Then this method is applied to source water. The degradation rate in 1 hour is 98.9 %, themineralization degrees of the two framing water factories are 85.4% and 80.8%. Thedegradation method of UV/H₂O_/O₃ has the advantage of high efficiency, clean andwithout second pollutant. It has good application prospection.