Characterization of natural organic matter in conventional water treatment processes for selection of treatment processes focused on DBPs control

Isolation of dissolved organic matter in effluents from sewage treatment plant and evaluation of the influences on its DBPs formation

“…Interpretation of the absorption bands of DOM has been described in the literature [11,15,17]. The chromatogram of each hydrophilic fraction was similar to that of DOM1 showing three peaks: 1630 cm −1 exhibiting aromatic skel ( C C) or aldehydic and ketonic groups ( C O); the peak at 1384 cm −1 suggesting aliphatic structures and 1153 cm −1 referring to carbohydrates ( C C) or Oalky group ( C O), such as hydroxy acids.…”

“…The column-capacity factor, k 0.5r , for separating hydrophobic acids through the XAD-8 resin column was 20-25. In this study, the cleaning method of XAD-8 has been modified from Thurman and Malcolm [14] and Kim and Yu [15]. After the XAD-8 resin was soxhlet-extracted sequentially for 24 h with acetone, hexane and methanol, the resin was packed in the glass column and rinsed with Milli-Q water till the DOC of the effluent was bellow 1 mg/L.…”

Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions

“…In the past decades, HS have received increasing attention, as they sustain plant growth [22], lead to the formation of disinfection by-products [23], and affect the fate of persistent organic pollutants and heavy metals [24,25] etc. Regarding their structure, HS are supermolecular associations by relatively small and heterogeneous molecules of various origins, which self-assemble by hydrophobic interactions and hydrogen bonds [26,27].…”

Applications of Infrared Spectroscopy in Analysis of Organic Aerosols

“…1710 -1680 Aromatic polycarboxylic acids (C=O) [12] 1706 C=O in aldehydes and ketones [55] 1700 Carbonyl (C=O) [54] 1690 -1680 Hydrogen bonded (O-H) [8] 1680 -1665, 1660 -1630 Aliphatic hydrocarbons (C=C) [12] 1680 -1630 C=O stretch in amide [44] 1680 -1620 Unsaturated aliphatic (C=C) [48] 1650 -1620 Alkenyl double bond stretch (C=C) [10] 1650 -1590 Amino (C-NH 2 ) [48] 1644, 1281, 849 O-N groups [31] 1640 -1560 N-H bend in primary amines [44] 1640 -1550 Primary and secondary amide N-H bend [44] 1440 -1220 Alcohol and phenol (C-O-H bend) [44] 1400 -1390 C-H deformation of CH 3 groups [52] 1400 OH in carbohydrates [12] 1400 C-H in carbohydrates [12] 1350 -1340 Nitro-aromatic (NO 2 ) [42] 1350 -1000 C-N stretch in amines [44] 1340 -1250 Aromatic (C-N) [48] 1320 -1210 Aliphatic carboxylic acids (CO) [12] 1320 -1210 Amino acids/Amines (CO) [12] 1300 -1100 Ketone C (C=O)C bend [44] 1300-1000 C-O stretch in ether, ester [44] 1298 -1200 Organonitrates [46] 1286, 1249, 1222 -CH 2 wagging [50] 1280 Organonitrate [41] 1280 -1278, 1631 Organonitrate [53] 1280 -1270 Organonitrate (ONO 2 ) [42] 1280 -1210 Esters/ethers/phenols (C-O) [7] 1280 -1137 C-O stretching of esters, ethers and phenols [52] 1280 Symmetric NO 2 stretch in organonitrate [44] G. 1260 -700 Alkane skeletal vibration (C-C) [38] 1220 C-O stretching and O-H bending vibrations of COOH [5] 1210 -1160, 1100 -1030 Esters/Lactones (C-C-O) [12] 1200 -900 Carbohydrates (C-O-C) [12] 1182 C-O-C stretching …”