River water treatment by continuous electrocoagulation: insights into removal of acetaminophen, and natural organic matter

River water was treated by continuous electrocoagulation (EC) for acetaminophen (AP), natural organic matter (NOM measured as UV254), and removal of elements. HRT at 40 min with 0.5 mg/L AP exhibited the best removal efficiency for NOM (55.9%) and AP (53.4%) removal. Except for aluminium, other elem...

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Bibliographic Details
Published in:Water science & technology. Water supply 2022-04, Vol.22 (4), p.4055-4066
Main Authors: Kumari, Shweta, Kumar, R. Naresh
Format: Article
Language:English
Subjects:
Acetaminophen
Adsorption
Aluminium
Aluminum
Analgesics
Chemicals
continuous ec
Disinfection & disinfectants
Drinking water
ec sludge
Efficiency
Electrocoagulation
Electrodes
Floating
Flotation
Fourier transforms
Functional groups
Hydroxides
nom
Organic matter
Pollutants
Porous materials
Removal
River water
Rivers
Sedimentation & deposition
Sludge
Spectrum analysis
Variance analysis
Water quality
Water treatment
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Summary:River water was treated by continuous electrocoagulation (EC) for acetaminophen (AP), natural organic matter (NOM measured as UV254), and removal of elements. HRT at 40 min with 0.5 mg/L AP exhibited the best removal efficiency for NOM (55.9%) and AP (53.4%) removal. Except for aluminium, other elements in river water were removed completely. The EC sludge (floating and settled) XRD spectrum showed peaks from AP were reduced, and the few peaks left were from aluminium hydroxide formed by EC. Several bonds in functional groups of AP and NOM were significantly deformed. FESEM images revealed that the sludge was highly porous material as needed for adsorption. EDAX showed that floating sludge had slightly higher carbon compared with settled sludge whereas nitrogen was higher in settled sludge. Other element concentrations in both sludges were similar, proving that water treatment was due to electro-floatation, adsorption, and sweep flocs. Single-factor ANOVA showed significant variance at HRT for NOM (F4.066 = 92.67, p =
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2022.034