Influence of pH on persulfate oxidation of TCE at ambient temperatures

Liang, Chenju; Wang, Zih-Sin; Bruell, Clifford J.

doi:10.1016/j.chemosphere.2006.05.026

Cited by 728 publications

(314 citation statements)

References 15 publications

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“…To understand the relationship between the temperature and the rate of the degradation of PVA, we assume that the k values can be expressed by the Arrhenius equation (Huang et al 2002;Liang et al 2007) as follows:…”

Section: Degradation Of Pvamentioning

confidence: 99%

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Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Lin

Lee

Hsu

2013

Int. J. Environ. Sci. Technol.

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This investigation evaluates the effectiveness of UV-365 nm/S 2 O 8 2-process in degrading polyvinyl alcohol in aqueous solutions. The effects of pH, Na 2 S 2 O 8 dosage, and temperature on the degradation efficiency of polyvinyl alcohol were studied. Under acidic conditions, the degradation efficiency of polyvinyl alcohol exceeded that under alkaline conditions. Additionally, a higher Na 2 S 2 O 8 dosage and a higher temperature were associated with a higher degradation efficiency of polyvinyl alcohol. The degradation rates of polyvinyl alcohol followed a pseudo-first-order kinetic model. Moreover, the observed degradation rate coefficient increased from 0.0078 to 0.4081 min -1 when the temperature was increased from 10 to 55°C. Also, the activation energy estimated using the observed degradation rate coefficients and the Arrhenius equation was 64 kJ/mol. At UV-365 nm, pH 3, an Na 2 S 2 O 8 dosage of 0.06 g/L, a temperature of 55°C, and an initial polyvinyl alcohol concentration of 20 mg/L, around 100 % of polyvinyl alcohol was degraded, indicating that UV-365 nm/S 2 O 8 2-process has great potential in degrading polyvinyl alcohol in aqueous solutions.

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Section: Degradation Of Pvamentioning

confidence: 99%

“…Persulfate ion (S 2 O 8 2-) has attracted growing interest as an alternative oxidant in the chemical oxidation of contaminants (Huang et al 2002;Liang et al 2007;Li et al 2009). The application of S 2 O 8 2-offers several advantages.…”

Section: Introductionmentioning

confidence: 99%

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Lin

Lee

Hsu

2013

Int. J. Environ. Sci. Technol.

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“…3 (b)) and CIP ( Fig. 3 (c) In general, SO 4 À is more likely to participate in electron transfer reactions [49,51,54] than OH which is more likely to participate in hydrogen abstraction or addition reactions [55,56]. The former reactions are selective while the later ones are nonselective.…”

Section: Effect Of Sulfate Ions On Pharmaceuticals Eliminationmentioning

confidence: 99%

On the role of salts for the treatment of wastewaters containing pharmaceuticals by electrochemical oxidation using a boron doped diamond anode

Lan

Coetsier

Causserand

et al. 2017

Electrochimica Acta

153

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. Refractory pharmaceuticals remain in biologically treated wastewater and are continuously discharged into aquatic systems due to their limited biodegradability. Electrochemical oxidation is promising for the treatment of such refractory compounds, in particular using a boron doped diamond (BDD) anode. This study investigates the role of salts, such as sulfates and chlorides in the electrochemical treatment of wastewater. The presence of sulfates accelerated the removal of ciprofloxacin and sulfamethoxazole, but had no effect on the oxidation of salbutamol. This comparison highlights the selectivity of the reaction between organics and sulfate radicals. The addition of chlorides into the solution led to a remarkablyfaster degradation of ciprofloxacin. However, incomplete mineralization was observed at high current densities due to the significant formation of halogenated organic compounds (AOX). The formation of refractory and toxic compounds such as ClO 4 À and AOX can be limited under the control of (i) applied current intensity and (ii) duration of electrolysis. Electrochemical oxidation of concentrated biologicallytreated hospital wastewater investigated the excellent removal of biorefractory pharmaceuticals and confirmed the acceleration effect of salts on pharmaceutical degradation.

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“…In sulfate radical advanced oxidation processes (SR-AOPs) like other advanced oxidation processes (AOPs), pH affects the kind and the quantity of radicals [26,27]. The removal efficiencies have been studied at various pH values ( Figure 3).…”

Section: Effect Of Phmentioning

confidence: 99%

Activation of Persulfate Using an Industrial Iron-Rich Sludge as an Efficient Nanocatalyst for Landfill Leachate Treatment

et al. 2018

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In this research, the performance of nanomaterials obtained from the converter sludge (CS) of Esfahan Steel Company, Iran was investigated for the activation of persulfate (PS). The experiments were conducted on real and synthetic leachates. CS showed high catalytic activity for removal of chemical oxygen demand COD and NH 3 because of its high iron oxide content. The effects of pH, CS dosage, and PS/COD ratio, temperature, and reaction time on the removal of COD and NH 3 were evaluated to optimize operational conditions (pH 2, CS dosage: 1.2 g L −1 , PS/COD: 4, and reaction time: 60 min). Maximum COD and NH 3 removal efficiencies were 73.56 and 63.87%, respectively. Finally, the optimized process was applied for treatment of a real leachate sample. Although the treated leachate was not suitable to discharge into the environment, an increase in the 5-day biochemical oxygen demand (BOD 5 ) and biodegradability (BOD 5 /COD) of leachate after treatment indicated that the effluent can be biologically treated. As a consequence, it can be combined with sewage or can be returned to the landfill.

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Influence of pH on persulfate oxidation of TCE at ambient temperatures

Cited by 728 publications

References 15 publications

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

On the role of salts for the treatment of wastewaters containing pharmaceuticals by electrochemical oxidation using a boron doped diamond anode

Activation of Persulfate Using an Industrial Iron-Rich Sludge as an Efficient Nanocatalyst for Landfill Leachate Treatment

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