Phosphite radicals and their reactions. Examples of redox, substitution, and addition reactions

Schaefer, K.; Asmus, K.‐D.

doi:10.1021/j100454a010

Cited by 14 publications

(3 citation statements)

References 11 publications

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“…On the basis of the work of Lipin and Masyutin , Adams et al . , and of Schaefer and Asmus , Huang et al . examined the efficacy of the Fe 2+ /H 2 O 2 (Fenton solution), the UV/Fe 2+ /H 2 O 2 (photo‐Fenton), and the electrolysis/Fe 2+ /H 2 O 2 (electro‐Fenton) systems to remove citrate from electrodeless nickel‐plating baths, in the presence of hypophosphite H 2 PO 2 − ions, with mixed results .…”

Section: Description Of Treatment Technologiesmentioning

confidence: 94%

Separation of transition metals and chelated complexes in wastewaters

Cheung

2014

Env Prog and Sustain Energy

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This review responds to the ongoing needs of wastewater engineers tasked with treating aqueous solutions containing chelated complexes of metal ions, of which nickel citrate in electrodeless plating and copper–EDTA in electronic chip board manufacturing are two key examples. Because of the presence of these sequestering agents, metallic ions cannot be readily precipitated by alkalinity, making a compelling case for the discovery of alternative methods of treatment. This review is a critical appraisal of the varying degrees of success in separation process strategies deployed for the recovery of metallic ions under such challenging chemical conditions. Guidance is provided on making progress toward satisfactory industrial solutions to surmount these difficulties. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 761–783, 2015

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Section: Description Of Treatment Technologiesmentioning

confidence: 94%

Separation of transition metals and chelated complexes in wastewaters

Cheung

2014

Env Prog and Sustain Energy

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“…Based on the mechanism of the UV-Fenton process 14 and the reaction of hypophosphite and phosphite with hydroxyl radicals ( • OH), 24,25 the reaction mechanism of the process can be illustrated using eqn (3)-( 12).…”

Section: Background Experimentsmentioning

confidence: 99%

Recovery of high purity ferric phosphate from a spent electroless nickel plating bath

Liu

Liang

et al. 2014

Green Chem.

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In this study, the UV-Fenton process was used to treat a spent electroless nickel plating bath, and to recover high purity ferric phosphate which could be used as a raw material in lithium ferric phosphate batteries. The effects of different parameters such as the H 2 O 2 dosage, the H 2 O 2 and Fe 2+ feeding modes and the initial temperature on the treatment efficiency of the process were investigated. The results indicated that the UV-Fenton process could effectively remove the chemical oxidation demand by about 96.1%. Meanwhile, the phosphate produced from the complete oxidation of hypophosphite and phosphite was recovered as a precipitation of ferric phosphate. According to the results, about 99.9% of the phosphorus in the spent electroless nickel plating bath can be recovered. Recovered ferric phosphate particles were high in purity and nanometer-sized. This method utilizes relatively clean and economical reagents in the recovery of phosphorus resources, and does not generate hazardous substances. It will provide a new green method for the spent electroless nickel plating bath treatment.

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“…Ingold [74] demonstrou que o radical DPPH • também pode reagir com antioxidantes através de mecanismos mais complexos, onde ocorrem reações acopladas de transferência de próton e de [73] . Este experimento indica que a reação de neutralização do radical DPPH • observado anteriormente (Figura 16) é devido à presença de ligantes do tipo P(III) e pelos produtos de sua degradação conforme sugerido pela literatura [78] Portanto, é plausível supor que o aquo-complexo possa reagir com o radical DPPH • quer através da abstração de um hidreto do ligante P(OEt) 3 ou de seus produtos de degradação quer através da oxidação do centro metálico (Ru(II) a Ru(III)). O valor exato do potencial de oxidação do radical hidroxila é ponto controverso de discussão na literatura [10] .…”

Section: -Aspectos Geraisunclassified

Nitrosilo complexos de rutênio(II) como captores de radicais de interesse biológico

Metzker¹

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da Aguardente do IQSC-USP pela harmoniosa convivência.A "velha guarda" da turma de bacharelado do IQSC-USP (2003).Aos amigos Raphael e Pietro pelas discussões e por compartilharem os momentos bons e difíceis durante esses dois anos de mestrado.A minha tia Apparecida pelo incentivo. Aos amigos Gisélia e Luiz Fernando pelos bons momentos vividos e pela amizadeA Veroneide por se mostrar sempre pronta a ajudar.Aos funcionários da biblioteca do IQSC, principalmente a Bernadete e Eliana por se mostrarem sempre prontas a ajudar.

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Phosphite radicals and their reactions. Examples of redox, substitution, and addition reactions

Cited by 14 publications

References 11 publications

Separation of transition metals and chelated complexes in wastewaters

Separation of transition metals and chelated complexes in wastewaters

Recovery of high purity ferric phosphate from a spent electroless nickel plating bath

Nitrosilo complexos de rutênio(II) como captores de radicais de interesse biológico

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