[Mineralization of BPA by combination of UV/H2O2/micro-aeration process].
The degradation and mineralization of bisphenol A(BPA) in water by UV/H2O2/micro-aeration process were investigated. UV/H2O2/ micro-aeration is a new process developing from UV/H2O2. A quantity of ozone appears when both micro-aeration and UV radiation exist, which enhances the productive rate of *OH. The effects of intensity of UV radiation, dosages of H2O2 and initial pH of the solution on mineralization of BPA by UV/H2O2/micro-aeration process were studied. The results show that the mineralization rate of BPA increases linearly with the enhancement of intensity of UV radiation. When the dosages of H2O2 change from 5 mg/L to 20 mg/L, the constant (k) of mineralization rate rises from 0.003 2 to 0.025 0. While pH is 6.68, it can get the best effect of mineralization. Under the same conditions the mineralization rate is much higher than its degradation rate. It's found that BPA is first degraded into smaller molecular organic matters, and the small molecular organic matters are further mineralized into inorganic matters gradually.
Hu
Ling
L
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. huling021@163.com
Gao
Nai-yun
NY
Xu
Bin
B
Li
Ruo-yu
RY
Zhao
Jian-fu
JF
Liu
Sui-qing
SQ
D001559:Benzhydryl Compounds; D019149:Bioreactors; D052244:Endocrine Disruptors / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000528:radiation effects; D010126:Ozone / Q000378:metabolism; D010636:Phenols / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry; D000098826:Bisphenol A Compounds
D001559:Benzhydryl Compounds; D052244:Endocrine Disruptors; D006861:Hydrogen Peroxide; D010126:Ozone; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds