Predicting trace organic compound breakthrough in granular activated carbon using fluorescence and UV absorbance as surrogates

Predicting trace organic compound attenuation with spectroscopic parameters in powdered activated carbon processes

“…5. This establishes TF as a more sensitive spectroscopic surrogate parameter than UV 254 , and is in agreement with a previous study on spectroscopic surrogates in granular activated carbon (GAC) processes (Anumol et al, 2015a). This means that fluorophores have greater adsorptive affinity for the activated carbons than UV-absorbing matter, therefore showing a better dynamic range that can be achieved using TF as compared to UV.…”

“…Fluorescence intensity was normalized by the area of Raman scattering peak of deionized water (Lawaetz and Stedmon, 2009). Fluorescence excitation emission matrices (F-EEMs) were produced for each sample as described in earlier research (Anumol et al, 2015a). Total fluorescence was calculated by integration of fluorescence spectra under the scanning excitation and emission wavelength range (Cheng et al, 2003b).…”

“…The application of bulk organic parameters as surrogates to predict TOrC removal by activated carbon and AOPs in wastewater has been shown previously (Gerrity et al, 2012;Zietzschmann et al, 2014;Anumol et al, 2015a). While UV 254 transmission has been used predominantly, the current study also explores fluorescence as a surrogate as fluorescence is expected to be orders of magnitude more sensitive for many chromophores than is UV transmission.…”

“…Spectrophotometric parameters like UV absorbance and fluorescence have been shown to accurately predict formation of disinfection byproducts and removal of TOrCs through various disinfection and oxidation processes used during water treatment (Roccaro and Vagliasindi, 2010;Gerrity et al, 2012;Sgroi et al, 2016). Further, UV absorbance at 254 nm wavelength (UV 254 ) has been successfully demonstrated as an efficient surrogate in predicting TOrC removal by PAC and GAC processes Anumol et al, 2015a). The use of spectrophotometric parameters and other bulk organic parameters as surrogates allows the potential for real-time, on-line monitoring of water treatment plant efficiency while also predicting specific TOrC attenuation through different treatment processes (Roccaro et al, 2015;Yu et al, 2015).…”

Removal of organic carbon, nitrogen, emerging contaminants and fluorescing organic matter in different constructed wetland configurations

“…The acquisition of 3-dimensional excitation−emission matrices (EEMs) provides a 'map' of contributions of different component classes comprising dissolved organic matter (DOM). This has resulted in the development of fluorescence indexes that have been shown to be useful indicators of water treatment efficacy [15][16][17][18], or surrogate parameters useful for monitoring the fate of EOCs during conventional and advanced wastewater treatments [19][20][21][22][23]. However, to the best of our knowledge, there are no studies dwelling on the use of fluorescence measurements as indicator of treatment performance and EOC surrogate in CW systems.…”