Degradation of diphenylamine by persulfate: Performance optimization, kinetics and mechanism

Li, Shen Xin; Wei, Dong; Mak, Nai Ki; Cai, Zongwei; Xu, Xiang Rong; Li, Hua Bin; Jiang, Yue

doi:10.1016/j.jhazmat.2008.07.110

Cited by 76 publications

(36 citation statements)

References 31 publications

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“…Figure 3 reveals that the E values after 30 min for pH 3, 5, 7, 9, and 11 were 93.6, 85.9, 53.2, 37.2, and 22.9 %, respectively; clearly, the degradation efficiency of PVA after 30 min increased as pH declined. The results obtained in this investigation were also in agreement with the previous findings that the degradation efficiency of methyl tert-butyl ether (MTBE) by heat-assisted persulfate process (Huang et al 2002) and the degradation efficiency of diphenylamine by persulfate (Li et al 2009) increased as pH decreased. This behavior is attributable to the fact that sulfate radicals decayed rapidly owing to the reaction with hydroxyl ions (Hayon and McGarvey 1967).…”

Section: Degradation Of Pvasupporting

confidence: 92%

“…This result revealed that higher temperature significantly enhanced the degradation of PVA during an initial period (0-15 min). As pointed out by Li et al (2009), the degradation of diphenylamine by persulfate was significantly influenced by temperature; that is, the higher temperature was associated with a higher degradation efficiency of PVA. Table 1 summarizes the difference of three methods for the degradation of PVA.…”

Section: Degradation Of Pvamentioning

confidence: 94%

“…Persulfate ion (S 2 O 8 2-) has attracted growing interest as an alternative oxidant in the chemical oxidation of contaminants (Huang et al 2002;Liang et al 2007;Li et al 2009). The application of S 2 O 8 2-offers several advantages.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Lin

Lee

Hsu

2013

Int. J. Environ. Sci. Technol.

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This investigation evaluates the effectiveness of UV-365 nm/S 2 O 8 2-process in degrading polyvinyl alcohol in aqueous solutions. The effects of pH, Na 2 S 2 O 8 dosage, and temperature on the degradation efficiency of polyvinyl alcohol were studied. Under acidic conditions, the degradation efficiency of polyvinyl alcohol exceeded that under alkaline conditions. Additionally, a higher Na 2 S 2 O 8 dosage and a higher temperature were associated with a higher degradation efficiency of polyvinyl alcohol. The degradation rates of polyvinyl alcohol followed a pseudo-first-order kinetic model. Moreover, the observed degradation rate coefficient increased from 0.0078 to 0.4081 min -1 when the temperature was increased from 10 to 55°C. Also, the activation energy estimated using the observed degradation rate coefficients and the Arrhenius equation was 64 kJ/mol. At UV-365 nm, pH 3, an Na 2 S 2 O 8 dosage of 0.06 g/L, a temperature of 55°C, and an initial polyvinyl alcohol concentration of 20 mg/L, around 100 % of polyvinyl alcohol was degraded, indicating that UV-365 nm/S 2 O 8 2-process has great potential in degrading polyvinyl alcohol in aqueous solutions.

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Section: Degradation Of Pvasupporting

confidence: 92%

Section: Degradation Of Pvamentioning

confidence: 94%

See 1 more Smart Citation

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Lin

Lee

Hsu

2013

Int. J. Environ. Sci. Technol.

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“…9). As mentioned above, Å OH and SO 4 -Å radicals are likely the two primary active oxidizing species generated by decomposition of PMS [89,90]. In the beginning of the reaction, aniline is first transformed to aniline radical and 4-amino-phenol by the attack of Å OH and SO 4 -Å radicals and yield either benzoquinonimine or nitrobenzene [91,92].…”

Section: Catalytic Oxidation Mechanism Of Anilinementioning

confidence: 98%

“…Further degradation of 1-hydroxy-1,2-diphenylhydrazine, as well as p-benzoquinone produced maleic acid. The maleic acid directly or via oxalic acid mineralized to CO 2 and H 2 O [6,36,90]. The second pathway implied that the degradation of aniline in PMS system was most likely due to its reaction with SO 4 -Å and Å OH radicals.…”

Section: Catalytic Oxidation Mechanism Of Anilinementioning

confidence: 99%

Direct fabrication of lamellar self-supporting Co3O4/N/C peroxymonosulfate activation catalysts for effective aniline degradation

Huang

Zhang

et al. 2017

Chemical Engineering Journal

107

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Thermally activated persulfate oxidation of Basic Fuchsin dye: Effect of different operating parameters, kinetic, and thermodynamic study

Habache,

Bechiri

2023

Int J of Chemical Kinetics

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The present paper aims to investigate the efficiency of thermal activation persulfate in eliminating the organic dye “Basic Fuchsin” (BF). In addition, the study attempts to elucidate the effect of different operating parameters, such as persulfate dosage (0.44–4.4 mM), the initial solution pH of (3–10), and temperature (25–50°C), on the process. The effects of various anions and water matrices on BF discoloration were investigated. Thus, the findings revealed that 94.15% of BF can be eliminated using persulfate at a concentration of 4.4 mM and a temperature equal to 50°C. It occurs under the following operating conditions: oxidation time of 60 min, initial pH equal to 6, the pollutant concentration of 10 ppm, and stirring speed equal to 300 rpm. Furthermore, the kinetic study indicated that the degradation of the BF dye using PS followed a first‐order pattern with rate constants varying within a range of 15.3 × 10−3–43.2 × 10−3 min−1. Based on the Arrhenius equation, the activation energy of the studied process was determined to be 29 kJ mol−1, suggesting that a moderate activation energy is required for BF discoloration. The results of the thermodynamic study confirm that the oxidation process is non‐spontaneous and endothermic. Coexisting inorganic anions delayed BF discoloration to varying degrees, and the inhibitory action followed the following order: carbonate > chloride > sulfate > nitrate. Organic pollutants oxidation by the thermal activation of the persulfate is a simple and effective method for the depollution of waste textile water.

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Degradation of diphenylamine by persulfate: Performance optimization, kinetics and mechanism

Cited by 76 publications

References 31 publications

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Degradation of polyvinyl alcohol in aqueous solutions using UV-365 nm/S2O8 2− process

Direct fabrication of lamellar self-supporting Co3O4/N/C peroxymonosulfate activation catalysts for effective aniline degradation

Thermally activated persulfate oxidation of Basic Fuchsin dye: Effect of different operating parameters, kinetic, and thermodynamic study

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