Prediction of DOM removal of low specific UV absorbance surface waters using HPSEC combined with peak fitting

Multi-Parameter Compensation Method for Accurate In Situ Fluorescent Dissolved Organic Matter Monitoring and Properties Characterization

“…Finally, cut-offs can be made based on the ability of removing the different components through water treatment processes, in particular coagulation. In previous studies, DOM peaks at 50,000 Da and 1900 Da were easily removed with one alum dose; the peaks at 800 Da and 1200 Da were only partially removed even after several alum treatments; and the DOM fraction with MW lower than 500 Da could not be removed [33,48].…”

High-performance size exclusion chromatography with a multi-wavelength absorbance detector study on dissolved organic matter characterisation along a water distribution system

“…High performance size exclusion chromatography coupled with ultraviolet (UV) detection (HPSEC-UV) has been successfully and widely used for determining the performance of drinking water treatment processes, such as DOM removal evaluation, potential disinfection by-product (DBP) formation prediction and treated drinking water distribution management Chow et al, 2008;Xing et al, 2012;Kristiana et al, 2013). These previous studies have demonstrated that the low molecular weight DOM compounds are recalcitrant to removal by conventional coagulation treatment.…”

Characteristics of NOM Released to Water from Different Forest and Agricultural Soils

“…It is also worth noting that the levels of detected absorbance intensity could be an indication of NOM enrichment with various aromatic functional groups released from the soils [11]. These observations may be useful for explaining the increased concentration of aromatic carbon compounds in water after a storm [12]. However, the most remarkable differences in the HPSEC profiles between the forest and agricultural soils appeared in the peak with the molecular weight of 9795 g/mol identified as PSS, as it can clearly be seen that the peak only appears in the profiles of the forest soils, indicating that forest soils can provide more compounds with comparatively larger molecular weight than the agricultural soils.…”

“…Regarding the composition of NOM, in addition to the index of specific ultraviolet absorbance (SUVA), which reflects the extent of aromaticity of the constituting components [1,2,6,7], fluorescence excitation-emission matrix (EEM) spectroscopy is increasingly used to generate information that cannot be achieved either by TOC, UV260 or SUVA [8][9][10]. In addition to these, the molecular weight (MW) distribution of NOM can provide valuable information for better understanding the polydisperse nature of NOM and the removal behavior of the constituting components during various physicochemical water treatment processes [2,11,12].…”