Topic
Reagent
About: Reagent is a research topic. Over the lifetime, 60091 publications have been published within this topic receiving 1234928 citations. The topic is also known as: reagens.
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TL;DR: The results indicate that even dilute concentrations of solvents, including H202, can increase the reactivity of O2- in water, probably by changing its solvation sphere.
Abstract: The reactive oxygen species responsible for the transformation of carbon tetrachloride (tetrachloromethane, CT) by modified Fenton's reagent using hydrogen peroxide (H2O2) concentrations >0.1 M was investigated. Addition of the hydroxyl radical scavenger 2-propanol to modified Fenton's reactions did not significantly lower CT transformation rates. Scavenging by 2-propanol not only confirmed that hydroxyl radicals are not responsible for CT destruction, but also suggested that a major product of an iron (III)-driven initiation reaction, superoxide radical anion (O2•-), is the species responsible for CT transformation. To investigate this hypothesis, CT degradation was studied in aqueous KO2 reactions. Minimal CT degradation was found in CT−KO2 reactions; however, when H2O2 was added to the KO2 reactions at concentrations similar to those in the modified Fenton's reactions (0.1, 0.5, and 1 M), CT degradation increased significantly. Similar results were obtained when 1 M concentrations of other solvents wer...
184 citations
TL;DR: To decolorize higher concentrations of RB5 and to reduce process costs the combination between the two processes was evaluated and it was verified that Fenton's reagent process lowered these higher azo dye concentrations to a value less than 230 mg/L, which is apparently compatible with the yeast action.
184 citations
TL;DR: Catalytic amounts of o -phenanthroline were found to enhance the rate of air-oxidation of all sulfhydryl groups tested in the presence of copper ions at neutral pH, and the interpretation is discussed that o-phenan Throline necessarily acts as a metal chelator in the inhibitory action of this reagent on any enzyme.
184 citations
TL;DR: Light is shed on the importance of Fe(III)/Fe(II) cycle for the design of high efficient Fenton system and provides an alternative pathway for the organic contaminants removal.
184 citations
TL;DR: In this article, several heterogeneity tests are performed on a mesoporous silica functionalized by mercaptopropyl trimethoxysilane, and the results show that the effective heterogeneity depends strongly on the solvent employed and the reaction conditions.
184 citations