Hydroxyl radical scavenging role of chloride and bicarbonate ions in the H2O2/UV process

Liao, Chih‐Hsiang; Kang, Shyh‐Fang; Wu, Fu‐An

doi:10.1016/s0045-6535(00)00278-2

Cited by 422 publications

(139 citation statements)

References 14 publications

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“…Furthermore, HCO À 3 absorbs light hindering its penetration in the water, thus protecting the bacteria (Grebel et al, 2010;Rincon and Pulgarin, 2004;Liao et al, 2001;Chen et al, 1997).…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

et al. 2013

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Fe 2þ and 10 mg L À1 of H 2 O 2 , led to the fastest bacterial inactivation kinetics. Using H 2 O 2 / UV 254 high disinfection rates were obtained similar to those obtained with photo-Fenton under UV 254 light. In Milli-Q water, the rate of inactivation for Escherichia coli was higher than in Leman Lake water and seawater due to the lack of inorganic ions affecting negatively bacteria inactivation. The presence of bicarbonate showed scavenging of the OH radicals generated in the treatment of photo-Fenton and H 2 O 2 /UV 254 . Despite the negative effect of inorganic ions, especially HCO 3 -, the disinfection treatments with AOPs in lake water and seawater improved significantly the disinfection compared to light alone (simulated sunlight and UV 254 ). In the treatment of photo-Fenton with simulated sunlight, dissolved organic matter had a beneficial effect by increasing the rate of inactivation. This is associated with the formation of Fe 3þ -organo photosensitive complexes leading to the formation of ROS able to inactivate bacteria. This effect was not observed in the photo-

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“…Furthermore, HCO À 3 absorbs light hindering its penetration in the water, thus protecting the bacteria (Grebel et al, 2010;Rincon and Pulgarin, 2004;Liao et al, 2001;Chen et al, 1997).…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

et al. 2013

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“…2-> Cl -(R 2 = 0.964 -0.999). The inhibiting effect of inorganic ions can be explained by the fact that these anions act as •OH radical scavengers, which protect a dye molecule from oxidation (Galindo et al, 2001;Liao et al, 2001). These anions are able to react with hydroxyl radicals leading to inorganic radical ions which show a much lower reactivity than •OH, so that they do not play a role in dye decolourisation.…”

Section: Effect Of Inorganic Ionsmentioning

confidence: 99%

Effects of system parameters and inorganic salts on the photodecolourisation of textile dye Reactive Blue 19 by UV/H<sub>2</sub>O<sub>2</sub> process

Radovic¹,

Mitrovic²,

Bojc

et al. 2014

WSA

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The photodecolourisation of textile dye Reactive Blue 19 (RB 19), an anionic anthraquinone dye of the reactive class, was investigated using UV radiation in the presence of H 2 O 2 in a batch photo-reactor with low-pressure mercury lamps. The effects of the system parameters: initial pH, initial dye concentration, concentration of peroxide and radiation intensity, as well as the presence of salts, (NaCl, Na 2 SO 4 , NaNO 3 , NaH 2 PO 4 ) on dye decolourisation was examined. Increasing the initial pH resulted in an increase in decolourisation efficiency. Results showed that with an increase of dye concentration from 10 to 100 mg•ℓ This study has shown that the UV/H 2 O 2 process is a promising technology for degradation of RB 19 in water and wastewater.

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“…12,19,27 To accomplish this under severe conditions, refractory NAFA was used as a model compound of DOM in river water. A 40 W LPT photoreactor with an irradiation time of 1 min was also used because the reactor generated…”

Section: Reagent-free Decomposition Of Dom In River-water Samplesmentioning

confidence: 99%

“…12,19 To minimize that interference, the chromatographic separation of the coexisting substances was applied before decomposition. 17,[20][21][22][23] In this paper, we propose a reagent-free and rapid decomposition method for DOM in river water using a VUV mercury lamp-pass-through (LPT) photoreactor.…”

Section: Introductionmentioning

confidence: 99%

Online TOC Analysis Based on Reagent-free Oxidation of Dissolved Organic Matter Using a Mercury Lamp-Pass-Through Photoreactor

2013

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Hydroxyl radical scavenging role of chloride and bicarbonate ions in the H2O2/UV process

Cited by 422 publications

References 14 publications

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

Effects of system parameters and inorganic salts on the photodecolourisation of textile dye Reactive Blue 19 by UV/H<sub>2</sub>O<sub>2</sub> process

Online TOC Analysis Based on Reagent-free Oxidation of Dissolved Organic Matter Using a Mercury Lamp-Pass-Through Photoreactor

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