A rapid spectrophotometric determination of persulfate anion in ISCO

Liang, Chenju; Huang, Chiu-Fen; Mohanty, Nihar; Kurakalva, Rama Mohan

doi:10.1016/j.chemosphere.2008.08.043

Cited by 1,270 publications

(326 citation statements)

References 7 publications

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“…In addition, iron-phosphate complexes might rapidly cover the surface of ZVI, preventing PS access and therefore complicating iron corrosion. This phenomenon might be another reason for the inhibition of CAP degradation [19]. The addition of NO 2 À significantly decreased the removal efficiency even at a low ionic strength (i.e., 1 mM) (Fig.…”

Section: +mentioning

confidence: 99%

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Degradation of chloramphenicol by persulfate activated by Fe 2+ and zerovalent iron

Nie

Yan

et al. 2015

Chemical Engineering Journal

201

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h i g h l i g h t sThe removal efficiencies for CAP in water by PS activated by Fe 2+ and ZVI were studied.CAP was effectively removed by the ZVI-PS system at a broad pH range of 3-10. CAP removal was significantly influenced by operational parameters.The ZVI-PS system shows potential prospects in wastewater or even concentrated wastewater treatment. An oxidation pathway was proposed for CAP removal by the ZVI-PS system. a r t i c l e i n f o , and HA significantly inhibited CAP decomposition. Up to 92.8%, 94.7%, and 75.7% of CAP were removed from the filtrate, permeate, and retentate phases of wastewater, respectively. This result indicated that the ZVI-PS system can significantly remove CAP from wastewater and even concentrated wastewater. The intermediate products during oxidation were identified, and the degradation pathways of CAP were tentatively proposed.

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Section: +mentioning

confidence: 99%

“…The concentration of residual PS was spectrophotometrically determined [19]. The amount of Fe 2+ was spectrophotometrically determined at a wavelength of 510 nm after adding 1,10-phenanthroline to form a colored complex.…”

mentioning

confidence: 99%

Degradation of chloramphenicol by persulfate activated by Fe 2+ and zerovalent iron

Nie

Yan

et al. 2015

Chemical Engineering Journal

201

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“…One-microliter sample was injected into the GC at a split ratio of 20:1. The concentration of PS was measured via UV spectrophotometric method as described elsewhere (Liang et al 2008b). The concentrations of ferrous ion (Fe 2+ ) and total iron ions (Fe 2+ ) and (Fe 3+ ) were determined by using the 1,10-phenanthroline method (Tamura et al 1974).…”

Section: Catalytic Studiesmentioning

confidence: 99%

Efficient degradation of trichloroethylene in water using persulfate activated by reduced graphene oxide-iron nanocomposite

Ahmad

et al. 2015

Environ Sci Pollut Res

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Graphene oxide (GO) and nano-sized zero-valent iron-reduced graphene oxide (nZVI-rGO) composite were prepared. The GO and nZVI-rGO composite were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR), energy-dispersive spectroscopy (EDS), and Raman spectroscopy. The size of nZVI was about 6 nm as observed by TEM. The system of nZVI-rGO and persulfate (PS) was used for the degradation of trichloroethylene (TCE) in water, and showed 26.5% more efficiency as compared to nZVI/PS system. The different parameters were studied to determine the efficiency of nZVI-rGO to activate the PS system for the TCE degradation. By increasing the PS amount, TCE removal was also improved while no obvious effect was observed by varying the catalyst loading. Degradation was decreased as the TCE initial concentration was increased from 20 to 100 mg/L. Moreover, when initial solution pH was increased, efficiency deteriorated to 80%. Bicarbonate showed more negative effect on TCE removal among the solution matrix. To better understand the effects of radical species in the system, the scavenger tests were performed. The •SO4(-) and •O2(-) were predominant species responsible for TCE removal. The nZVI-rGO-activated PS process shows potential applications in remediation of highly toxic organic contaminants such as TCE present in the groundwater. Graphical abstract Persulfate activated by reduced graphene oxide and nano-sized zero-valent iron composite can be used for efficient degradation of trichloroethylene (TCE) in water.

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“…The methodology of Liang et al [27] was used. The 1 ml of solution was taken for analysis after a given period of time during 2 h of the process carried out without and with the carbon material.…”

Section: Kinetics Measurementsmentioning

confidence: 99%

“…The ammonium persulfate solution was used as a modifier. The persulfate ions are characterised by a high redox potential E ⦵ = 2.01 V similar to ozone (E ⦵ = 2.07 V), which indicates great oxidation reactivity [27,28]. Kinetics of the modification process and the changes of the carbon surface were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Persulfate treatment as a method of modifying carbon electrode material for aqueous electrochemical capacitors

Kopczyński

Pęziak-Kowalska

Lota

et al. 2016

J Solid State Electrochem

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The activated carbon was modified by the wet method with a solution of ammonium persulfate at room temperature with different times. Kinetics studies showed that the modification took place mostly during the first 60 min of the process. The physicochemical properties of the obtained carbon were evaluated by thermogravimetric studies, Raman and FTIR spectroscopy, elementary and BET analyses. Furthermore, the fabricated material was applied in symmetric capacitors operated on the three aqueous electrolytes (1 M H 2 SO 4 , 6 M KOH and 1 M Na 2 SO 4 ). Mild conditions of the modification process are optimal to obtain electroactive groups on the carbon surface, which make this material useful in a supercapacitor application. In our studies, we noticed that this type of functional groups mainly appears on the surface of the activated carbon, in the first oxidation stage. With prolonged oxidation, they may transform into undesirable groups. The results show that this kind of modification improves the capacity of all the tested supercapacitors. It was connected mainly with an increase of the carbon material's wettability and in the case of capacitor operated in acid and base electrolytes due to a redox reaction of oxygen functional groups.

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A rapid spectrophotometric determination of persulfate anion in ISCO

Cited by 1,270 publications

References 7 publications

Degradation of chloramphenicol by persulfate activated by Fe 2+ and zerovalent iron

Degradation of chloramphenicol by persulfate activated by Fe 2+ and zerovalent iron

Efficient degradation of trichloroethylene in water using persulfate activated by reduced graphene oxide-iron nanocomposite

Persulfate treatment as a method of modifying carbon electrode material for aqueous electrochemical capacitors

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