TY - JOUR
T1 - Oxidation of municipal wastewater by free radicals mechanism. A UV/Vis spectroscopy study
AU - Giannakopoulos, E.
AU - Isari, E.
AU - Bourikas, K.
AU - Karapanagioti, H. K.
AU - Psarras, G.
AU - Oron, G.
AU - Kalavrouziotis, I. K.
N1 - Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/6/15
Y1 - 2017/6/15
N2 - This study investigates the oxidation of municipal wastewater (WW) by complexation with natural polyphenols having radical scavenging activity, such as (3,4,5 tri-hydroxy-benzoic acid) gallic acid (GA) in alkaline pH (>7), under ambient O2 and temperature. Physicochemical and structural characteristics of GA-WW complex-forming are evaluated by UV/Vis spectroscopy. The comparative analysis among UV/Vis spectra of GA monomer, GA-GA polymer, WW compounds, and GA-WW complex reveals significant differences within 350–450 and 500–900 nm. According to attenuated total reflectance (ATR) spectroscopy and thermogravimetric analysis (TGA), these spectra differences correspond to distinct complexes formed. This study suggests a novel role of natural polyphenols on the degradation and humification of wastes.
AB - This study investigates the oxidation of municipal wastewater (WW) by complexation with natural polyphenols having radical scavenging activity, such as (3,4,5 tri-hydroxy-benzoic acid) gallic acid (GA) in alkaline pH (>7), under ambient O2 and temperature. Physicochemical and structural characteristics of GA-WW complex-forming are evaluated by UV/Vis spectroscopy. The comparative analysis among UV/Vis spectra of GA monomer, GA-GA polymer, WW compounds, and GA-WW complex reveals significant differences within 350–450 and 500–900 nm. According to attenuated total reflectance (ATR) spectroscopy and thermogravimetric analysis (TGA), these spectra differences correspond to distinct complexes formed. This study suggests a novel role of natural polyphenols on the degradation and humification of wastes.
KW - Complexation
KW - Free radicals
KW - Municipal wastewater
KW - Oxidation
KW - Polyphenols
UR - http://www.scopus.com/inward/record.url?scp=84997764967&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2016.07.055
DO - 10.1016/j.jenvman.2016.07.055
M3 - Article
C2 - 27492877
AN - SCOPUS:84997764967
VL - 195
SP - 186
EP - 194
JO - Journal of Environmental Management
JF - Journal of Environmental Management
SN - 0301-4797
ER -
