Characterization of chromophoric dissolved organic matter (CDOM) in rainwater using fluorescence spectrophotometry.
The fluorescence excitation-emission matrix of Chromophoric dissolved organic matter (CDOM) samples from rainwater collected at Rameswaram, Tamilnadu, India are analysed. Total five peaks were observed for humic/marine and protein likes substances respectively. The peak A and C intensities varies form 1.98 ± 0.28 and 0.97 ± 0.11 QSU respectively represents humic like substances. The peak B and T intensities varies from 3.94 ± 0.75 and 7.42 ± 1.43 QSU showed association of protein like substances whereas peak M intensities varies from 1.92 ± 0.37 QSU indicates marine contribution. Among the fluorophores, the following sequence were observed as T > B > A > M > C which indicates dominance of Tryptophan like substances in rainwater. The average peak T/C ratios was observed as 7.88 ± 2.2 indicates microbial contamination by Tryptophan-like substances with the high biological activity and low volatility.
Environmental Impact & Risk Assessment Division (EIRA Division), National Environmental Engineering Research Institute (NEERI), Nehru Marg, Nagpur 440 020, Maharashtra, India. pr_salve@neeri.res.in
P R
PR
Salve
H
H
Lohkare
T
T
Gobre
G
G
Bodhe
R J
RJ
Krupadam
D S
DS
Ramteke
S R
SR
Wate
D001272:Atmosphere / Q000737:chemistry; D004784:Environmental Monitoring; D006812:Humic Substances / Q000032:analysis*; D007194:India; D055668:Photochemical Processes; D011891:Rain / Q000737:chemistry*; D012623:Seawater / Q000032:analysis / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
D006812:Humic Substances; D014874:Water Pollutants, Chemical