Photodegradation of ferric ethylenediaminetetra(methylenephosphonic acid) (EDTMP) in aqueous solution

Matthus, E.; Oude, N. T. De; Bolte, Michèle; Lemaire, J.

doi:10.1016/0043-1354(89)90008-0

Cited by 49 publications

(25 citation statements)

References 10 publications

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“…The corrosion of carbon steel in the tested solution characterised by the high-frequency capacitive loop can be attributed to a charge transfer process [11], [13] and [52]. A 16 small tail at the low-frequency region of the Nyqusit plot obtained in the tested soft water without an inhibitor can be related to metal dissolution [9].…”

Section: Electrochemical Impedance Spectroscopy (Eis) Measurementsmentioning

confidence: 93%

“…Phosphonates such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP) [14], amino (trimethylene phosphonic acid) (ATMP) [15], ethylenediaminetetra (methylenephosphonic acid) (EDTMP) [16], diethylenetriaminepentakis (methylenephosphonic acid) (DTPMP) [17], and2-Phosphonobutane-1,2,4 tricarboxylic acid (PBTCA) [18] contain one or more R 3 C-P(O)(OH) 2 group/s instead of an R 3 C-O-P(O)(OH) 2 group. Phosphonates possess a number of superior qualities, including high chemical stability under extreme pH and temperature, ability to complex metals, ability to adsorb strongly onto a metal surface, as well as dispersant activity against suspended matter.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic corrosion inhibition of environment-friendly inhibitors on the corrosion of carbon steel in soft water

et al. 2015

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Section: Electrochemical Impedance Spectroscopy (Eis) Measurementsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Synergistic corrosion inhibition of environment-friendly inhibitors on the corrosion of carbon steel in soft water

et al. 2015

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“…Phosphonates are not biodegraded during conventional wastewater treatment (Horstmann and Grohmann 1988;Steber and Wierich 1986) but are removed by adsorption onto biosolids (Nowack 2002a) and onto ferric flocs used in tertiary treatment (Fischer 1993;Nowack 1998). Like carboxylates (Lockhart and Blakeley 1975) phosphonates resist photodegradation in the absence of metal ion coordination, but readily photodegrade when complexed to Fe(III) (Steber and Wierich 1986;Matthijs et al 1989;Fischer 1993). Schowanek and Verstraete (1991) observed a 1% loss of ethylenediaminetetra(methylenephosphonic acid) (EDTMP, 2, Fig.…”

Section: Introductionmentioning

confidence: 97%

Manganese-catalyzed degradation of phosphonic acids

Nowack

Stone

2003

Environmental Chemistry Letters

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The non-biodegradable and chemically very stable phosphonates are used in a variety of industrial applications including cooling waters, oil production and textile industry. We show here that they are degraded in the presence of Mn(II) and oxygen. The half-life for the reaction is 9 min near neutral pH. The presence of other cations such as Ca(II) and Zn(II) considerably slows down the reaction by competition with Mn(II) for the phosphonate. The reaction involves the oxidation of complexed Mn(II) by oxygen to Mn(III) and the subsequent oxidation of phosphonate by Mn(III) thus yielding two stable phosphonic acid breakdown products. The oxidation also proceeds in the presence of the mineral manganite (Mn(III)OOH), and yields the same breakdown products. The use of a newly developed chromatographic method revealed the presence of the breakdown products in wastewater. The results show that manganese-catalyzed oxidation might be an important pathway for phosphonate degradation in natural waters.

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“…In the presence of Fe(III), two different photoprocesses can be observed, depending on the nature of the pollutant. (1) If the pollutant is able to complex Fe(III), eg nitrilotriacetic acid,2 ethylenediaminetetraacetic acid3 or ethylene diaminetetra(methylene phosphonic acid),4 a complex between the pollutant and Fe(III) which absorbs in the near UV‐visible spectral region is formed. In this case, an intramolecular photoredox process leading to the degradation of the pollutants is observed.…”

Section: Introductionmentioning

confidence: 99%

Iron(III) photo‐induced degradation of isoproturon: correlation between degradation and toxicity

Galichet

Mailhot

Bonnemoy

et al. 2002

Pest Management Science

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The degradation of isoproturon photoinduced by Fe(III) was investigated under both artificial and solar light. The monomeric species Fe(OH)2+ present under the experimental conditions ([Fe(III)] = 3 x 10(-4) M) is the main Fe(III) species responsible for the degradation of isoproturon. The process involves the attack on the pollutant by OH radicals generated by irradiation of Fe(OH)2+. The major primary photoproducts were identified; they accumulate in the solution medium before being degraded. The toxicity of the solution to marine bacterium Vibrio fisheri (Beijerinck) Lehmann & Neumann was monitored during the degradation process. It increased in the early stages of the reaction and, among the photoproducts, the N-formyl derivative appeared to be the major product responsible for the increase in toxicity.

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Photodegradation of ferric ethylenediaminetetra(methylenephosphonic acid) (EDTMP) in aqueous solution

Cited by 49 publications

References 10 publications

Synergistic corrosion inhibition of environment-friendly inhibitors on the corrosion of carbon steel in soft water

Synergistic corrosion inhibition of environment-friendly inhibitors on the corrosion of carbon steel in soft water

Manganese-catalyzed degradation of phosphonic acids

Iron(III) photo‐induced degradation of isoproturon: correlation between degradation and toxicity

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