1999
DOI: 10.1016/s0045-6535(98)00201-x
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Reducing degradation of azo dye by zero-valent iron in aqueous solution

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Cited by 267 publications
(172 citation statements)
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“…The reduction is known to take place in the presence of Fe 0 and dilute acid [27] and the yield of the reaction is commonly less than 92 % of the theoretical amount [26,28]. The investigations of Weber [1] were performed in analogy to more recent works on the reductive degradation of organic compounds [2,4,29,30] and the 150 years old work of Béchamp was not considered. Given the possible differences in Fe 0 -H 2 O systems at pH 4 and pH 7 (e.g., contaminant speciation, kinetics of Fe 0 corrosion), Weber [1] did not explained why a reaction, which is not quantitative in industrial reactors at pH 4, should be quantitative in the environment at pH 7.2.…”
Section: The Mtw Concept and Its Limitationsmentioning
confidence: 99%
“…The reduction is known to take place in the presence of Fe 0 and dilute acid [27] and the yield of the reaction is commonly less than 92 % of the theoretical amount [26,28]. The investigations of Weber [1] were performed in analogy to more recent works on the reductive degradation of organic compounds [2,4,29,30] and the 150 years old work of Béchamp was not considered. Given the possible differences in Fe 0 -H 2 O systems at pH 4 and pH 7 (e.g., contaminant speciation, kinetics of Fe 0 corrosion), Weber [1] did not explained why a reaction, which is not quantitative in industrial reactors at pH 4, should be quantitative in the environment at pH 7.2.…”
Section: The Mtw Concept and Its Limitationsmentioning
confidence: 99%
“…The main absorbance region for sulfanilic acid is 258-269 nm and that for sulfanilate ion is 249 nm. Cao et al [17] studied the degradation of acid orange II dye in aqueous phase using Fe 0 system and observed reduction in the visible absorbance of reacted dye that is accompanied by wavelength shifts in UV region.…”
Section: Time Dependent Spectral Profile Transitions Ofmentioning
confidence: 99%
“…Thus the overall reaction is: [16][17][18][19][20][21][22][23][24][25][26][27]. Although Fe 0 has been applied extensively for remediation of several pollutants, the major drawbacks are slow reaction rates, rapid passivation of the metal and requirement for strict anaerobic conditions.…”
Section: Introductionmentioning
confidence: 99%
“…[7][8][9][10][11] Dyes are another category of complex chemicals that are labile to reduction, as already shown for several dyes. [12][13][14][15][16][17][18] Several metals (such as Zn, Sn, Pt) can be used as reduction agents, but iron has received the foremost emphasis due to its high efficiency in addition to its low cost and toxicity. [19][20][21][22][23][24][25][26][27][28][29] Mass spectrometry (MS) has been used for a long time for the measurement of isotopes and to determine the structure of organic molecules.…”
Section: Introductionmentioning
confidence: 99%