River water treatment using electrocoagulation for removal of acetaminophen and natural organic matter

Electrocoagulation (EC) was assessed for removal of acetaminophen and natural organic matter (measured as UV254) from river water. Process was assessed for time, electrode materials, inter electrode distance, and voltage. Best conditions for removal of acetaminophen and UV254 absorbance were 60 min...

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Vydané v:Chemosphere (Oxford) Ročník 273; s. 128571
Hlavní autori: Kumari, Shweta, Kumar, R. Naresh
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: England Elsevier Ltd 01.06.2021
Predmet:
absorbance
Acetaminophen
Al(OH)3
Aluminum
electric potential difference
Electrocoagulation
Electrodes
organic matter
Reaction kinetics
river water
Rivers
Spectroscopy, Fourier Transform Infrared
UV254
Water Pollutants, Chemical
Water Purification
Water treatment
Water treatment
Al(OH)3
Acetaminophen
UV254
Reaction kinetics
UV
Al(OH)
ISSN:0045-6535, 1879-1298, 1879-1298
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Shrnutí:Electrocoagulation (EC) was assessed for removal of acetaminophen and natural organic matter (measured as UV254) from river water. Process was assessed for time, electrode materials, inter electrode distance, and voltage. Best conditions for removal of acetaminophen and UV254 absorbance were 60 min reaction time, aluminum-aluminum electrodes, 2 cm inter electrode distance, and 9 V. Acetaminophen tested at 1, 2, 5, 10, and 20 mg L−1 showed that treatment efficiency decreased as the concentration increased. The main mechanism for removal of acetaminophen was H bonding with Al(OH)3 flocs; this was confirmed by XRD and FT-IR spectrum. Pseudo-second order kinetics model exhibited a good fit on experimental data for acetaminophen removal at different concentrations. Univariate ANOVA indicated statistically significant difference between treatments for acetaminophen removal (F2.76 = 136, P = <0.001). A significant linear correlation was found between UV254 absorbance and acetaminophen removal at different concentrations. Preliminary analysis suggest that EC will cost US$ 0.22/m3 for river water treatment. The lab-scale EC process was compared with a full-scale water treatment plant for removal of natural organic matter. Water treatment plant after multiple levels of purification was not able to fully remove UV254 absorbance whereas EC treatment showed good efficiency. [Display omitted] •Electrocoagulation effectively removed acetaminophen at 1 mg L−1•Main removal mechanism was H bonding of acetaminophen on Al(OH)3 flocs•Acetaminophen removal shows good correlation with UV254 absorbance removal•Conventional water treatment plant is unable to remove UV254 absorbance completely•Electrocoagulation can be suitable replacement for coagulation-flocculation
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0045-6535
1879-1298
1879-1298
DOI:10.1016/j.chemosphere.2020.128571