%0 Journal Article
%A Nanaboina, Venkateswarlu
%A Korshin, Gregory V.
%D 2010
%T Evolution of Absorbance Spectra of Ozonated Wastewater and Its Relationship with the Degradation of Trace-Level Organic Species
%U https://acs.figshare.com/articles/journal_contribution/Evolution_of_Absorbance_Spectra_of_Ozonated_Wastewater_and_Its_Relationship_with_the_Degradation_of_Trace_Level_Organic_Species/2742934
%R 10.1021/es1005175.s001
%2 https://acs.figshare.com/ndownloader/files/4420420
%K Absorbance Spectra
%K absorbance spectra
%K ozone concentrations
%K DEET
%K Ozonated Wastewater
%K treatment times
%K EfOM chromophores
%K degradation
%K ozonated wastewater
%K evolution
%K EfOM absorbance
%K 320 nm
%K wastewater ozonated
%X This study examined the evolution of absorbance spectra of wastewater ozonated using varying initial ozone concentrations or treatment times; concomitant changes of concentrations of trace-level pharmaceuticals were also quantified. The absorbance of ozonated wastewater decreased due to the degradation of chromophores in effluent organic matter (EfOM). The relative decrease of absorbance (ΔA/A0) ranged from <30% for λ < 250 nm to >80% for λ > 320 nm. The removal of atenolol, carbamazepine, DEET, diclofenac, gemfibrozil, ibuprofen, iopromide, naproxen, propranolol, sulfamethoxazole, trimethoprim, and p-chlorobenzoic acid was strongly correlated with ΔA/A0 values. The observed features were hypothesized to correspond to the engagement of kinetically distinct groups of EfOM chromophores. Modeling of the evolution of EfOM absorbance and concurrent degradation of trace-level organic species based on this hypothesis confirmed its applicability and utility for practical applications and theoretical exploration.
%I ACS Publications