Potential for activated persulfate degradation of BTEX contamination

Liang, Chenju; Huang, Chiu-Fen; Chen, Yan-Jyun

doi:10.1016/j.watres.2008.06.022

Cited by 224 publications

(117 citation statements)

References 15 publications

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“…This phenomena of the condition, where total iron was dissolved and a low concentration of Fe 2? was present with iron activated PS, is similar to those studies using complexing agents such as citric acid (Liang et al 2004b;Liang et al 2008a;Crimi and Taylor 2007) and cyclodextrin (Liang et al 2008a;Liang et al 2007) in maintaining available Fe 2? in solution to activate PS.…”

Section: Evaluation Of Various Persulfate Activation Processessupporting

confidence: 80%

“…A fixed SPS concentration of 100 mM and different activator concentrations of 300 mM H 2 O 2 , 50 mM NaOH, and 10 mM Fe 2? were used to evaluate the performance of PS in degrading 2,4-D in aqueous phase (Liang et al 2008a;Liang and Su 2009). Note that selections of the concentration levels were also in accordance with the concentration range recommended by the SPS manufacturer (FMC-Corporation 2012) (note, see Table SI2 for FMC recommended reagent dosage in the PS system, Supporting Information).…”

Section: Methodsmentioning

confidence: 99%

“…Supposedly, without the presence of Fe 2? , the iron PS activation would be stalled and no further sulfate radical would be generated (Liang et al 2004a;Liang et al 2008a). However, it was observed that the 2,4-D concentration still continuously decreased at a low Fe 2?…”

Section: Evaluation Of Various Persulfate Activation Processesmentioning

confidence: 99%

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A study of the applicability of various activated persulfate processes for the treatment of 2,4-dichlorophenoxyacetic acid

Liang

Guo

Pan

2013

Int. J. Environ. Sci. Technol.

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This paper reports an investigation of different persulfate (PS) activations, including PS at 20°C (PS), thermally activated PS at 70°C (T-PS), ferrous-ion activated PS at 20°C [Fe(II)-PS)], hydrogen peroxide activated PS at 20°C, and sodium hydroxide activated PS at 20°C, for degradation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous phase. Several findings were made in this study including the followings: the 2,4-D degradation rates in T-PS and Fe(II)-PS systems were higher than other systems. However, complete degradation of 2,4-D and associated derivatives can be reached in all oxidation systems, with various reaction times. When considering the results of PS consumption during the 48 h reaction time to reach complete 2,4-D degradation, the T-PS system consumed all of the PS while only 10 % of the PS was consumed in the Fe(II)-PS system.

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Section: Evaluation Of Various Persulfate Activation Processessupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A study of the applicability of various activated persulfate processes for the treatment of 2,4-dichlorophenoxyacetic acid

Liang

Guo

Pan

2013

Int. J. Environ. Sci. Technol.

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“…This behavior was also observed in the studies of Liang et al (2004a and for the PS oxidation of trichloroethylene (TCE) and benzene-toluene-ethylbenzene-xylene (BTEX) compounds. It was hypothesized that this behavior was due to either the destruction of SO 4 • − in the presence of excess Fe 2+ or the rapid conversion of Fe 2+ to Fe 3+ (Liang et al, 2004a(Liang et al, , 2008. The instantaneous change in color observed when PS was added and the formation of an iron hydroxide precipitate (Fe(OH) 3 ) within the first 3 min strongly suggests that the oxidation of Fe 2+ was very rapid.…”

Section: Oxidation Of Ibpmentioning

confidence: 99%

“…Persulfate (PS) was also proven to be very useful for the elimination of contaminants such as diphenylamine, trichloroethylene, benzene, toluene, ethyl benzene and xylene in aqueous and soil slurries (Liang et al, 2004a(Liang et al, , 2004b(Liang et al, , 2008. However, currently only one study investigated the use of PS or activated-PS for the elimination of a different pharmaceutical product, sulfamonomethoxine (Yan et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Sabri

Hanna

Yargeau

2012

Science of The Total Environment

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The objective of this work was to evaluate the removal of ibuprofen (IBP) using the oxidants hydrogen peroxide (H 2 O 2 ) and sodium persulfate (Na 2 S 2 O 8 ). The ability of magnetite (Fe 3 O 4 ) to activate persulfate (PS) and H 2 O 2 for the oxidation of IBP at near neutral pH was evaluated as well. The use of soluble Fe 2+ to activate H 2 O 2 and Na 2 S 2 O 8 was also investigated. H 2 O 2 and Na 2 S 2 O 8 were inactive during the sixty-minute experiments when used alone. However, activation using Fe 2+ increased the removal to 95% in the presence of H 2 O 2 (Fenton reaction) and 63% in the presence of Na 2 S 2 O 8 at pH 6.6. Chemical oxygen demand (COD) removal was also greater for Fenton oxidation (65%) than for iron-activated PS oxidation (25%). Activation of H 2 O 2 and PS by Fe 3 O 4 was only observed at a high oxidant concentration and over 48 h of reaction time. A second order rate kinetic constant was determined for H 2 O 2 (3.0 * 10 − 3 M − 1 s − 1 ) and Na 2 S 2 O 8 (1.59 * 10 − 3 M − 1 s − 1 ) in the presence of Fe 3 O 4 . Finally, several of the degradation products formed during oxidation of IBP in the presence of H 2 O 2 and Na 2 S 2 O 8 (activated by Fe 2+ ) were identified. These include oxalic acid, pyruvic acid, formic acid, acetic acid, 4-acetylbenzoic acid, 4-isobutylacetophenone (4-IBAP) and oxo-ibuprofen.

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Filter‐membrane treatment of continuous‐flow tetracycline through photocatalysis‐assisted peroxydisulfate oxidation

Zhu

Tang

et al. 2022

AIChE Journal

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Herein, we craft a high‐performance advanced oxidation process (AOP) of photocatalysis‐coupled peroxydisulfate (PDS) system toward practical applications in organic wastewater treatment. CoFe2O4 nanoparticles well grow onto TiO2 nanotube arrays (TNAs) mesh (CoFe2O4/TNAs). The artful CoFe2O4/TNAs composite plays a bifunctional role in the proposed AOP. On one hand, CoFe2O4/TNAs itself is a visible‐light‐response photocatalyst. On the other hand, the Co(II) or Fe(II) in CoFe2O4 can heterogeneously activate PDS to generate energetic active species (•OH, SO4˙–, O2˙–, and 1O2). Meanwhile, the photo‐induced electrons can be also captured by electron traps Co(III) (or Fe(III)) which are further reduced to Co(II) (or Fe(II)) for continuous activation of PDS. As a result, the robust AOP of photocatalysis‐coupled PDS can almost completely degrade 10 mg/L refractory tetracycline within 40 min. Moreover, the proposed process shows a stable continuous‐flow treatment performance. This work provides basic understanding and support for continuous‐flow treatment of organic wastewater by photocatalysis‐coupled PDS system.

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Potential for activated persulfate degradation of BTEX contamination

Cited by 224 publications

References 15 publications

A study of the applicability of various activated persulfate processes for the treatment of 2,4-dichlorophenoxyacetic acid

A study of the applicability of various activated persulfate processes for the treatment of 2,4-dichlorophenoxyacetic acid

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Filter‐membrane treatment of continuous‐flow tetracycline through photocatalysis‐assisted peroxydisulfate oxidation

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