Unveiling the transformation of dissolved organic matter during ozonation of municipal secondary effluent based on FT-ICR-MS and spectral analysis

Highly efficient catalytic transfer hydrogenolysis for the conversion of Kraft lignin into bio-oil over heteropoly acids

“…10d: (1) oxidized and unsaturated compounds, (2) reduced and unsaturated compounds, (3) reduced and saturated compounds, and (4) oxidized and saturated compounds. 38 After CHT, the NOSC values in the lignin oil exhibited a negative shift, indicating that the proportion of unsaturated and reduced compounds increased. All of these results confirmed that the obtained lignin oil may contain some nonionizable compounds which are not observable by the ESI-FT-ICR MS technique.…”

“…The observation of negligible changes in DBE during CTH was consistent with that reported by McClelland et al 11,13 Double bond equivalent minus oxygen per carbon ((DBE-O)/C) and NOSC were used to reflect the degree of unsaturation and redox state, respectively. 38 All of the compounds can be divided into four zones according to the positive and negative values of (DBE-O)/C and NOSC as shown in Fig. 10d: (1) oxidized and unsaturated compounds, (2) reduced and unsaturated compounds, (3) reduced and saturated compounds, and (4) oxidized and saturated compounds.…”

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

“…This may be attributed to the challenges associated with the characterization of molecular structure variations of NOM, which makes many studies limited to aromaticity, fluorescence, etc. [71]. This research gap can be filled by advanced analytical techniques based on high-resolution mass spectrometry (MS), such as Fourier transform ion cyclotron resonance (FT-ICR-MS), Orbitrap MS, and time-of-flight MS.…”

Disinfection byproducts formed during drinking water treatment reveal an export control point for dissolved organic matter in a subalpine headwater stream

“…The presence of DBPs is a prominent concern for municipal treatment facilities ( AWWA, 2020 ), but formation can be mitigated through a variety of approaches that target additional removal of dissolved organic carbon or with the adoption of alternative disinfection processes. While prior studies have focused on DBP reduction by changing conventional unit processes during drinking water treatment ( Andersson et al., 2020 ; Postigo et al., 2021 ; Zhang et al., 2021 ), those methods present an additional economic and infrastructure burden that can be particularly pronounced for smaller facilities. In addition, disinfection methods that use alternatives to chlorine can form other, less understood byproducts ( Richardson and Plewa, 2020 ).…”