Effect of some parameters on the rate of the catalysed decomposition of hydrogen peroxide by iron(III)-nitrilotriacetate in water

Laat, J. De; Dao, Yen Hai; Najjar, Nasma Hamdi El; Daou, Claude

doi:10.1016/j.watres.2011.08.028

Cited by 101 publications

(30 citation statements)

References 42 publications

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“…They are successfully used to reduce the toxicity of toxic chemicals, convert toxic and biorecalcitrant contaminants into biodegradable byproducts, remove color, or obtain a complete mineralization of organic pollutants. 1−4 Such positive results in terms of water decontamination are due to the irradiation of Fe(III) complexes which could produce oxidative radicals (like HO • , HO 2 • , O 2…”

Section: Introductionmentioning

confidence: 99%

Toward a Better Understanding of Fe(III)–EDDS Photochemistry: Theoretical Stability Calculation and Experimental Investigation of 4-tert-Butylphenol Degradation

Brigante

Dong

et al. 2014

J. Phys. Chem. A

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The present work describes in detail the chemical structure of the complex Fe(III)–EDDS and the predominance of different species with respect to pH. These results were obtained with ab initio calculations. From the photoredox process, the formation of hydroxyl radical was confirmed, and HO(•) is the main species responsible for the degradation of the organic compound present in aqueous solution. The degradation of 4-tert-butylphenol (4-t-BP), used as a model pollutant, was investigated in different conditions. For the first time, the second-order rate constant of the reaction between HO(•) and 4-t-BP and the formation rate of HO(•) (R(HO(•))(f)) from the photochemical process were evaluated. Through the degradation of 4-t-BP, the effect of Fe(III)–EDDS concentration, oxygen, and pH was also investigated. The pH, which plays a role in the iron cycle and in the Fe(III)–EDDS speciation, was noticed as an important parameter for the efficiency of 4-t-BP degradation. Such a result could be explained by taking into account the complex speciation and presence of a predominant form (FeL–) up to pH 8. These results are very useful for the use and optimization of such iron complexes in water treatment processes.

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Section: Introductionmentioning

confidence: 99%

Toward a Better Understanding of Fe(III)–EDDS Photochemistry: Theoretical Stability Calculation and Experimental Investigation of 4-tert-Butylphenol Degradation

Brigante

Dong

et al. 2014

J. Phys. Chem. A

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“…•− and ( 3) Fe(II)-NTA was generated by the Equation ( 46), but it was instantaneously oxidized to Fe(III)-NTA (Equation ( 42)) [26]. [26,95] (Table 3, Section 2.4). In addition, significant scavenging of the hydroxyl radicals generated is expected by NTA due to the high rate constant between this CA and OH • , especially significant at high pH values [95], as seen in Table 3.…”

Section: Nitrilotriacetic Acid (Nta)mentioning

confidence: 99%

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

et al. 2021

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Persistent organic contaminants affecting soil and groundwater pose a significant threat to ecosystems and human health. Fenton oxidation is an efficient treatment for removing these pollutants in the aqueous phase at acidic pH. However, the in-situ application of this technology for soil remediation (where pHs around neutrality are required) presents important limitations, such as catalyst (iron) availability and oxidant (H2O2) stability. The addition of chelating agents (CAs), forming complexes with Fe and enabling Fenton reactions under these conditions, so-called chelate-modified Fenton process (MF), tries to overcome the challenges identified in conventional Fenton. Despite the growing interest in this technology, there is not yet a critical review compiling the information needed for its real application. The advantages and drawbacks of MF must be clarified, and the recent achievements should be shared with the scientific community. This review provides a general overview of the application of CAs to enhance the Fenton process for the remediation of soils polluted with the most common organic contaminants, especially for a deep understanding of the activation mechanisms and influential factors. The existing shortcomings and research needs have been highlighted. Finally, future research perspectives on the use of CAs in MF and recommendations have been provided.

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“…In the rst round, the concentration of Fe 2+ rapidly dropped from 101.0 mg L À1 to 2.1 mg L À1 as H 2 O 2 was added into the solution and slightly increased to 7 mg L À1 , indicating that partial Fe 3+ can also be recovered to Fe 2+ , according to Fenton-like reactions (2) and (3). 20,21 Fe 3+ + H 2 O 2 / Fe 2+ + HO 2 $ + H 2 O…”

Section: Mechanism Of Benzene Degradationmentioning

confidence: 99%

Enhanced degradation of gaseous benzene by a Fenton reaction

et al. 2017

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Effect of some parameters on the rate of the catalysed decomposition of hydrogen peroxide by iron(III)-nitrilotriacetate in water

Cited by 101 publications

References 42 publications

Toward a Better Understanding of Fe(III)–EDDS Photochemistry: Theoretical Stability Calculation and Experimental Investigation of 4-tert-Butylphenol Degradation

Toward a Better Understanding of Fe(III)–EDDS Photochemistry: Theoretical Stability Calculation and Experimental Investigation of 4-tert-Butylphenol Degradation

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

Enhanced degradation of gaseous benzene by a Fenton reaction

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