The wide application of bisphenol A (BPA) affects all aspects of human life, and bisphenol A has potential harm to human health. Ozonation has a rapid rate of reaction in the degradation of organic pollutants and no secondary pollution. In this work, the degradation of bisphenol A in aqueous solution by continuous ozone from the ozone generator was studied. The effects of ozone concentration, influent flow rate, pH, initial concentration of bisphenol A and temperature on the ozonation of BPA were investigated. And the reaction mechanism of ozonation of bisphenol A was explored. The results showed that ozonation had a good removal effect on bisphenol A from contaminated water. The conditions for ozonation of bisphenol A were obtained by ozone concentration of 11.04 mg/L, flow rate of 2 mL/min, raw water pH at 6.83, loaded temperature 40℃, initial concentration of bisphenol A 10 mg/L, the removal rate of bisphenol A reached up to 86.12%. Appropriate temperature rise promoted ozone degradation of bisphenol A and increase the removal rate of bisphenol A. The appropriate increase of ozone dosage increased the removal rate of bisphenol A. Ozonation of bisphenol A was a rapid reaction with low activation energy. The increase of pH reduced the removal rate of bisphenol A, and ozone degradation of bisphenol A was better under acidic conditions. The removal rate of bisphenol A decreased with the increase of flow rate. When the ozone dose was constant, the increase of initial concentration of bisphenol A resulted in a decrease of the removal rate of bisphenol A. Tert-butanol inhibited the production of hydroxyl radicals and reduced the removal rate of bisphenol A, but its concentration had little effect on the removal rate of bisphenol A. Ozonatio of bisphenol A was mainly caused by direct oxidation of ozone and there was also indirect oxidation of hydroxyl radicals.
Jiaoyu CHEN Guanhua MENG Wang WEI Baohe LIU Suyun DING Jiarui HE
. Performance and mechanism of ozonation of bisphenol A[J]. The Chinese Journal of Process Engineering, 2020
, 20(2)
: 230
-236
.
DOI: 10.12034/j.issn.1009-606X.219165
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