Effects of chloride ion on degradation of Acid Orange 7 by sulfate radical-based advanced oxidation process: Implications for formation of chlorinated aromatic compounds

Yuan, Ruixia; Ramjaun, Sadiqua N.; Liu, Jianshe

doi:10.1016/j.jhazmat.2011.09.007

Cited by 521 publications

(130 citation statements)

References 37 publications

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“…This could be explained by the fact that Cl − presents the inhibitory effect at low concentrations and shows the acceleration effect when Cl − is over a critical concentration [35]. According to Eq.…”

Section: Reactivity and Stability Of Ag/mpg-c 3 Nmentioning

confidence: 99%

Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Wang

Zhao

Cao

et al. 2017

Applied Catalysis B: Environmental

502

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Section: Reactivity and Stability Of Ag/mpg-c 3 Nmentioning

confidence: 99%

Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Wang

Zhao

Cao

et al. 2017

Applied Catalysis B: Environmental

502

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“…HCO À 3 $ H þ þ CO ÀÅ 3 ; pK a ¼ 9:5 ð18Þ However, inhibitory effect has been reported in a cobalt activated PS system for decolorization of Acid Orange 7 (Yuan et al, 2011) as solution contained concentration of NaCl less than 0.4 M; only hyper-concentration of NaCl (0.5 M) could enhance bleaching rate and NaCl higher than 5 · 10 -3 M could decrease the inhibitory effect. Wang et al (2011) have also found that Cl À exhibited a significant inhibiting effect at low concentration (60.01 mol/L) in Co 2+ activated peroxymonosulfate system for decolorization of Acid Orange 7.…”

Section: àmentioning

confidence: 99%

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

Weng

Tao

2018

Arabian Journal of Chemistry

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The commercially available Fe 0 aggregate has advantages of low-cost, fast-effective decontamination, reusability, and ease of operation. However, little study has been done on the performance of Fe 0 aggregate as a catalyst in degradation of azo dyes, particularly used in persulfate (PS) oxidation process. This study investigated decolorization of a reactive azo dye, Remazol Golden Yellow (RGY, Reactive Orange 107), by persulfate oxidation activated with Fe 0 aggregate. RGY decolorization was not effective in ultrasound-activated, heat-activated, and base-activated persulfate oxidation; however, a significant decolorization improvement was achieved by applying Fe 0 aggregate to activated persulfate (PS/Fe 0 ). Decolorization was strongly influenced by pH, Fe 0 , persulfate dosages and temperature. The suitable conditions for RGY decolorization were pH 6.0, PS 5 · 10 -3 M, and Fe 0 0.5 g/L. This condition yields 98% color removal of 100 mg/L RGY solution within 20 min treatment; the azo bonds of RGY were completely broken down. RGY decolorization followed the first-order kinetics. Activation energy of the PS/Fe 0 system was 0.479 kJ/mol, suggesting the temperature dependence of RGY decolorization is small. The presence of inorganic salt in RGY solution had an adverse effect on decolorization. The inhibitory effect of various inorganic salts on decolorization followed the sequence of Na 2 HPO 4 ) NaHCO 3 ) NaClO 4 > NaCl > NaNO 3 > NaClO 4 > no salt. The Fe 0 aggregate was reusable and a satisfactory decolorization efficiency was achieved with the repeated use of Fe 0 for five times. The PS/Fe 0 process provides an efficiency and effective technology for RGY decolorization. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…Many studies have focused on process operations both before and in the plant itself . Juuti et al (1996) and Yuan et al (2011) have noted that the ECF bleaching process will have an impact on the environment due to the significant ecological toxicity of AOX, which can seriously inhibit the effectiveness of the biological treatment of wastewater. Related studies have pointed out that the amount of AOX formed is closely related to the unbleached kappa number of the pulp and the dosage of chlorine dioxide (Johansson and Fletcher 1994;Tsai et al 1994;Yin et al 1994;Bjorklund et al 2002;Garcia et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of AOX Formation in Chlorine Dioxide Bleaching of Bagasse Pulp

et al. 2014

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In this paper, a kinetic model of the first chlorine dioxide bleaching stage (D0) in an elemental chlorine-free (ECF) bleaching sequence is presented for bagasse pulps. The model is based on the rate of adsorbable organic halogen (AOX) formation. The effects of the chlorine dioxide dosage, the sulfuric acid dosage, and the reaction temperature on the AOX content of wastewater are examined. The reaction of AOX formation could be divided into two periods. A large amount of AOX was formed rapidly within the first 10 min. Ten minutes later, the AOX formation rate significantly decreased. The kinetics could be expressed as: 4 ] is the dosage of sulfuric acid (kg/odt). The fit of the experiment results obtained for different temperatures, initial chlorine dioxide dosages, initial sulfuric acid dosages, and AOX content were very good, revealing the ability of the model to predict typical mill operating conditions.

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Effects of chloride ion on degradation of Acid Orange 7 by sulfate radical-based advanced oxidation process: Implications for formation of chlorinated aromatic compounds

Cited by 521 publications

References 37 publications

Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

Kinetics of AOX Formation in Chlorine Dioxide Bleaching of Bagasse Pulp

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