Effect of ozone exposure on the oxidation of trace organic contaminants in wastewater.

摘要: Three tertiary-treated wastewater effluents were evaluated to determine the impact of quality (i.e. effluent organic matter (EfOM), nitrite, and alkalinity) on ozone (O(3)) decomposition subsequent removal 31 contaminants including endocrine disrupting compounds, pharmaceuticals, personal care products. The O(3) dose was normalized based upon total carbon (TOC) nitrite allow comparison between different wastewaters with respect decomposition. EfOM higher molecular weight components underwent greater transformation, which corresponded increased when compared a TOC basis. Hydroxyl radical (()OH) exposure, measured by parachlorobenzoic acid (pCBA), showed that limited ()OH available for contaminant destruction during initial stage (t 10(5)M(-1)s(-1) (k(OH))>10(9)M(-1)s(-1), carbamazepine, diclofenac, naproxen, sulfamethoxazole, triclosan, >95% removed independent water exposure (integralO(3)t) measurable (0-0.8mgmin/L). would be conservative surrogate assess trace are fast-reacting O(3). Removal k(O)(3) 10(9)M(-1)s(-1), atrazine, iopromide, diazepam, ibuprofen, varied could not measured, appeared dependent compound specific k(OH). Atrazine, ibuprofen iopromide provided excellent linear correlation pCBA (R(2)>0.86) making them good indicators availability.