pH dependence of persulfate activation by EDTA/Fe(III) for degradation of trichloroethylene

Liang, Chenju; Liang, Ching-Ping; Chen, Chi‐Chih

doi:10.1016/j.jconhyd.2009.02.008

Cited by 198 publications

(63 citation statements)

References 32 publications

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“…Although no other Fe(III)-complex is known to activate persulfate decomposition, Liang et al (2009) complexation of ferric iron by EDTA in a 1:1 proportion is very effective in persulfate activation, mainly in alkaline media. Here, instead of a ligant, we observed the effect of hydroxylamine (HAm), a well-known reduction agent, addition on PS activation by both Fe(II) and Fe(III).…”

Section: Effect Of Transition Metals and Hydroxylamine (Ham) On Stz Dmentioning

confidence: 99%

Evaluation of sulfathiazole degradation by persulfate in Milli-Q water and in effluent of a sewage treatment plant

Velosa

Nascimento

2016

Environ Sci Pollut Res

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The presence of antibiotics and their metabolites in natural waters has raised some concern among scientists around the world because it can lead to bacterial resistance and other unknown consequences to mankind and wildlife. Persulfate (PS)-driven oxidation is a new technology that has been used successfully to remediate contaminated sites, but its use to treat wastewater, especially sewage treatment plant (STP) effluent, is still scarce. This paper describes the effect of several persulfate activation methods for degrading sulfathiazole (STZ) in Milli-Q water and in STP effluent. Some parameters, such as pH, persulfate concentration, presence of Mn, Zn, Cu, Fe, and Fe, as well as copper and iron organic complexes, were studied in STZ degradation. Raising the pH from 5 to 9, as well as the persulfate concentration, resulted in increased STZ degradation. Among the transition metals evaluated, only Fe and Cu were able to activate persulfate molecules. Copper was a better activator than iron since its effect lasts longer. Citrate was the best ligand evaluated increasing Fe(II) activation capacity at pH 7. Hydroxylamine addition to Fe(II) on persulfate system extended the Fe(II) effect. The presence of bicarbonate or humic acid did not affect PS-driven degradation of STZ. Finally, the degradation of STZ in STP effluent promoted by PS-driven oxidation (25 °C) was as fast as in Milli-Q water, proving to be successful.

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Section: Effect Of Transition Metals and Hydroxylamine (Ham) On Stz Dmentioning

confidence: 99%

Evaluation of sulfathiazole degradation by persulfate in Milli-Q water and in effluent of a sewage treatment plant

Velosa

Nascimento

2016

Environ Sci Pollut Res

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“…Liang and co-workers reported that the addition of citric acid in Fe(II) [45] in persulfate system improved the trichloroethylene (TCE) degradation by stabilizing Fe(III) and preventing its precipitation as iron hydroxide/iron oxide. Other studies investigated the development of SR using EDTA to remove TCE from aqueous solution [46].…”

Section: Ferrous Activation Systemsmentioning

confidence: 99%

Sulfate Radical Technologies as Tertiary Treatment for the Removal of Emerging Contaminants from Wastewater

2017

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Abstract:Water scarcity and water pollution is a worldwide problem and has driven research into eco-friendly and low-energy cost efficient remediation. The reuse of wastewater for non-potable purpose after proper treatment is the only sustainable solution to the problem. Advanced oxidation processes (AOP) based on the in-situ generation of hydroxyl radicals have been intensively investigated for this purpose as a treatment step to achieve wastewater reuse. The main degradation mechanism of AOPs is based on the reaction of hydroxyl radicals with dissolved organic matter. However, hydroxyl radicals follow unselective multi-step pathways, limiting their efficiency in complex environmental matrices. To overcome such limitations, AOP treatment, based on generation of sulfate radicals, has been developed and widely investigated. This current mini-review will cover the most recent developments regarding emerging contaminant removal, i.e., organic micropollutants, using sulfate radicals generated by active persulfate or peroxymonosulfate, with a focus on an application to wastewater effluents for possible wastewater reuse.

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“…The persulfate aniion (S 2 O 8 2− ) with a high standard oxidation potential (2.01 V) can be activated by heat, light, ultrasound, or transition metal (eqs 1 and 2, respectively) to produce sulfate radical (SO 4 •− ), which can destroy a wide range of organic pollutants in the aqueous phase and in polluted soils (Cuypers et al, 2000;Yen et al, 2001;Huang et al, 2005;Liang et al, , 2009 …”

Section: Introductionmentioning

confidence: 99%

Removal of polycyclic aromatic hydrocarbons from sediments using sodium persulfate activated by temperature and nanoscale zero-valent iron

Chen

Bình

Chen

et al. 2014

Journal of the Air & Waste Management Association

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, and temperature (50-70°C) were performed. The efficiency to remove PAHs was 10.7-39.1% for unactivated persulfate. The treated sample had over 50% of the persulfate still remaining from an initial persulfate dose of 170 g/L, whereas less than 1% of the persulfate remained from an initial persulfate dose of 0.017, 0.17, and 1.7 g/L. Adequate persulfate (170 g/L) must be present because it is the source of the sulfate radicals responsible for the degradation of PAHs. Results indicated that increasing temperature and the addition of nZVI into a persulfate-slurry system could enhance the persulfate oxidation process. The best removal efficiency (90%) was achieved after 24 hr while adding nZVI (0.01 g/L) to persulfate (170 g/L) at temperature of 70°C. The results suggested that nZVI assisted persulfate oxidation without elevating temperature may be a suitable and economic alternative for the ex situ treatment of PAH-contaminated sediments.Implications: Nano zero-valent iron (nZVI) has been successfully applied to transform/degrade contaminants in soils and water. Additionally, nZVI has been used as a catalyst to activate persulfate for the treatment of various contaminants. In this study, with the support of temperature, nZVI-persulfate oxidation system for treatment of PAH-contaminated sediments was improved significantly and the treated sediment could meet remediation goals.

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pH dependence of persulfate activation by EDTA/Fe(III) for degradation of trichloroethylene

Cited by 198 publications

References 32 publications

Evaluation of sulfathiazole degradation by persulfate in Milli-Q water and in effluent of a sewage treatment plant

Evaluation of sulfathiazole degradation by persulfate in Milli-Q water and in effluent of a sewage treatment plant

Sulfate Radical Technologies as Tertiary Treatment for the Removal of Emerging Contaminants from Wastewater

Removal of polycyclic aromatic hydrocarbons from sediments using sodium persulfate activated by temperature and nanoscale zero-valent iron

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