Treatment of waste containing EDTA by chemical oxidation

Tucker, Mark; Barton, Larry L.; Thomson, Bruce M.; Wagener, Brant M.; Aragon, Andrew

doi:10.1016/s0956-053x(99)00235-4

Cited by 46 publications

(34 citation statements)

References 17 publications

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“…Since that time, on a worldwide scale over 100,000 tons of aminopolycarboxylic acids have been produced annually. It was estimated that 65,000 tons of EDTA and DTPA would be used up a year by the pulp and paper industry in the USA (Tucker, et al 1999). Its annual consumption in West Europe was about Table 1.…”

Section: Edta and Ntamentioning

confidence: 99%

Chelating Agents of a New Generation as an Alternative to Conventional Chelators for Heavy Metal Ions Removal from Different Waste Waters

Kołodyńska¹

2011

Expanding Issues in Desalination

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Section: Edta and Ntamentioning

confidence: 99%

Chelating Agents of a New Generation as an Alternative to Conventional Chelators for Heavy Metal Ions Removal from Different Waste Waters

Kołodyńska¹

2011

Expanding Issues in Desalination

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“…In all the photo-Fenton processes, there was a change in pH from 4.5 to 8.5 as the reaction proceeded. From this it can be inferred that acidity was lost and hence loss of the chelating ability of EDTA [11]. This was confirmed titrimetrically.…”

Section: Resultsmentioning

confidence: 53%

“…H 2 O 2 [9], photocatalysis [10], use of UV ? oxidants [11], radiolysis [12], radio-photocatalysis [13], and combined techniques [14] with variable results. Degradation of EDTA using H 2 O 2 alone at alkaline pH has also been reported [15].…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of EDTA using Fenton’s reagent: a pilot-scale study

2011

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The presence of ethylenediaminetetraacetic acid (EDTA) in decontamination wastes can cause complexation of cations resulting in interferences in their removal by various treatment processes, for example chemical precipitation, ion exchange, etc., and can negatively affect the quality of the final form of the waste. Advanced oxidation processes using ozone, H 2 O 2 , ultrasonics (US), ultraviolet (UV) light, Fenton's reagent (Fe(II) ? H 2 O 2 ), alone or in combination, are regarded as possible methods of clean and ecologically safe remedial treatment for the degradation of organics. In this study, the development of a column photoreactor (15 L) and a shallow-tank photoreactor (100 L) was carried out at the Centralised Waste Management Facility, Kalpakkam, India. Pilot-scale (batch) studies of the photocatalytic degradation of EDTA (20,000 mg/L) using UV ? Fenton's reagent in these reactor geometries were attempted. The effect of the power of the UV radiation on the kinetics of photodegradation of EDTA (20,000 mg/L) was studied using the column photoreactor. The shallow-tank reactor was used to study the photodegradation of EDTA (20,000 mg/L) using UV radiation, visible radiation, and sunlight. The successful use of sunlight as a source of energy and its greater effectiveness than UV radiation in the treatment of EDTA are presented.

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“…2 Removal of EDTA is not possible by biological treatment processes, 3 using chlorine is not always efficient, 4 and retention of the compound is hardly possible by activated carbon filters. 5 Some advanced oxidation technologies for EDTA degradation have been established like ozonation, 6 UV with different oxidants, 7,8 radiolysis 9 and other combined techniques. 8,10 The application of titania as a photocatalyst is limited due to its band gap of 3.2 eV.…”

Section: Introductionmentioning

confidence: 99%

Phosphate Modification of Nano Titania and Its Effect on the Photodegradation of EDTA

Iravani¹,

Allahyari²,

Torab‐Mostaedi³

2016

Journal of the Brazilian Chemical Society

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The surface of nano titania was phosphate modified and characterized by X-ray diffraction (XRD), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), energy dispersive X-ray analysis (EDX), and elemental analysis (CHN) to show the existence of phosphate in the modified nano titania. The resultant phosphated nano titania was applied for photocatalytic degradation of ethylenediaminetetraacetic acid disodium salt (EDTA) in aqueous solution. The crystallite size and crystalline phase showed no considerable change after modification, hence photocatalytic effect improvement of phosphate modified nano titania compared with the pure nano titania could be probably due to the existence of phosphate groups on the surface. The changes of the initial pH, photocatalyst dosage and EDTA concentration were tested in the degradation experiments. The pseudo-first-order kinetic model described the dynamic behavior for the photocatalytic degradation of EDTA using phosphate modified nano titania.

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Treatment of waste containing EDTA by chemical oxidation

Cited by 46 publications

References 17 publications

Chelating Agents of a New Generation as an Alternative to Conventional Chelators for Heavy Metal Ions Removal from Different Waste Waters

Chelating Agents of a New Generation as an Alternative to Conventional Chelators for Heavy Metal Ions Removal from Different Waste Waters

Photodegradation of EDTA using Fenton’s reagent: a pilot-scale study

Phosphate Modification of Nano Titania and Its Effect on the Photodegradation of EDTA

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