2004
DOI: 10.1021/es0304704
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Formate Ion Decomposition in Water Under UV Irradiation at 253.7 nm

Abstract: Formate ion (HCO2-) occurs in natural waters as a result of photooxidation of humic substances. Under UV irradiation, as applied in water purification (253.7 nm), formate ion decomposed following split-rate pseudo-zero-order kinetics (k1 and k2 are initial and final rate constants, respectively). In the presence of dissolved oxygen (DO), it was found that (a) k1 < k2, (b) k1 and k2 increased with initial formate ion concentration ([HCO2-]0 = (1.73-38.3) x 10(-5) mol L(-1)) and absorbed UV intensity (Ia = (1.38… Show more

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Cited by 17 publications
(10 citation statements)
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References 27 publications
(44 reference statements)
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“…Among the natural scavengers, low-molecular weight carboxylic acids (LMWA) are expected to play an important role [26]. The most common LMWA is formate, which can reach µM levels in surface waters [27] and is for instance the main…”
Section: Surface Watersmentioning
confidence: 99%
“…Among the natural scavengers, low-molecular weight carboxylic acids (LMWA) are expected to play an important role [26]. The most common LMWA is formate, which can reach µM levels in surface waters [27] and is for instance the main…”
Section: Surface Watersmentioning
confidence: 99%
“…Obviously these vitamins Although no microorganisms were detected in SOW after the 96 hrs incubation there was a small increase in turbidity (Figure 6a). Some of this could have been due to photooxidation of some substances that has been shown to occur in natural waters such as humic acid, volatile organic compounds, phenol and so on, that resulted in some precipitation (Hu et al 2001;Koh et al2004;Talu and Diyamandoglu, 2004). However it is more likely due to an increase in the pH from 7.9 to 8.5 again causing some precipitation.…”
Section: Wastewater Treatment Using the Isolate Dk6mentioning
confidence: 99%
“…One advantage of formate as a counter-anion is that it is less corrosive than chloride [4]. Another benefit is that formate anions can be decomposed with ultraviolet radiation [5] or ozone [6] and accumulation of anions in treated water can be avoided. Formate is also a biodegradable anion, which is a beneficial property if the chemical is used in wastewater treatment where biological treatment is part of the process.…”
Section: Introductionmentioning
confidence: 99%