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Can fluorescence spectrometry be used as a surrogate for predicting the dissolved organic nitrogen and its bioavailable portion in wastewater effluents?
- Hu, Haidong, Ren, Hongqiang
- Chemosphere 2016 v.164 pp. 299-303
- dissolved organic nitrogen, effluents, factor analysis, fluorescence, fluorescence emission spectroscopy, models, prediction, regression analysis, wastewater, wastewater treatment
- This study investigated the applicability of fluorescence excitation–emission matrices coupled with parallel factor analysis (EEM–PARAFAC) for predicting dissolved organic nitrogen (DON) and bioavailable DON (ABDON) in wastewater effluents. A four component PARAFAC model was developed using 40 EEMs of effluent samples from four full-scale wastewater treatment plants. The DON showed a poor correlation with the PARAFAC components (−0.117 < r < 0.308, p = 0.053–0.471), while ABDON correlated significantly with protein-like components C2 (r = 0.511, p < 0.05) and C3 (r = 0.576, p < 0.05, Pearson test). Further, a multivariate linear regression model having a good predictive capability for ABDON with mean absolute error of 12.0% was developed. Results demonstrate that the application of fluorescence spectroscopy for predicting effluent DON may have limitations, however, it could provide an alternative tool for predicting effluent ABDON.