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Effect of effluent organic matter on ozonation of bezafibrate

He, Huan, Sui, Qian, Lu, Shuguang, Zhao, Wentao, Qiu, Zhaofu, Yu, Gang
Frontiers of environmental science & engineering 2015 v.9 no.6 pp. 962-969
acute toxicity, aqueous solutions, bacteria, bovine serum albumin, humic acids, luminescence, mineralization, ozonation, sodium alginate
The influence of three effluent organic matter (EfOM) model compounds, humic acid (HA), bovine serum albumin (BSA), and sodium alginate (AGS), on the ozonation of bezafibrate (BF), a typical pharmaceutical and personal care product (PPCP), was investigated. The results show that ozonation efficiently removed BF from aqueous solution with removal efficiencies > 95% within 8 min for all conditions. The reaction rate of BF decreased with increasing model compounds concentrations and the influence was more pronounced for HA and BSA, while less pronounced for AGS. Although BF concentration was significantly reduced, the degree of mineralization achieved was only approximately 11%. The addition of HA and BSA improved the mineralization of the solution, while the influence of AGS was minor. The acute toxicity of BF solution during ozonation was determined using the Luminescent bacteria test, and the toxicity exhibited an initial increase and a successive reduction. An overall decreased acute toxicity was observed with an increase of HA. The presence of BSA increased the formation rate of toxicity intermediates and resulted in inhibition peak forward.