Oxidative degradation of diclofenac by thermally activated persulfate: implication for ISCO

Chen, Jiabin; Qian, Yanlong; Li, Hongmei; Huang, Tianyin

doi:10.1007/s11356-015-5630-0

Cited by 89 publications

(10 citation statements)

References 44 publications

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“…With the temperature increasing, the CAP degradation efficiency kept increasing in the selected range. Similar phenomena have been frequently observed especially for thermal activation decomposition of organics [43][44][45][46]. The O-O bond breakage is reasonably enhanced with temperature increase and more SO 4…”

Section: Interactive Effects Of Operational Parameterssupporting

confidence: 82%

Hydrothermal Enhanced Nanoscale Zero-Valent Iron Activated Peroxydisulfate Oxidation of Chloramphenicol in Aqueous Solutions: Fe-Speciation Analysis and Modeling Optimization

Yang

Xue

et al. 2019

Water

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The efficiencies of the nanoscale zero-valent iron (nZVI) and hydrothermal and nZVI-heat activation of peroxydisulfate (PS) were studied for the decomposition of chloramphenicol (CAP) in aqueous solutions. The nZVI heat combined with activation of PS provided a significant synergistic effect. A central composite design (CCD) with response surface methodology (RSM) was employed to explore the influences of single parameter and interactions of selected variables (initial pH, PS concentration, nZVI and temperature) on degradation rates with the purpose of condition optimization. A quadratic model was established based on the experimental results with excellent correlation coefficients of 0.9908 and 0.9823 for R2 and R2adj. The optimized experimental condition for 97.12% CAP removal was predicted with the quadratic model as 15 mg/L, 0.5 mmol/L, 7.08 and 70 °C for nZVI dosage, PS, initial pH, and temperature, respectively. This study demonstrated the effectiveness of RSM for the modeling and prediction of CAP removal processes. In the optimal condition, Fe2O3 and Fe3O4 were the predominant solid products after reactions based on X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis, which could also act as the activators along with the reaction. Overall, it could be concluded that hydrothermal enhanced nZVI activation of PS was a promising and efficient choice for CAP degradation.

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Section: Interactive Effects Of Operational Parameterssupporting

confidence: 82%

Hydrothermal Enhanced Nanoscale Zero-Valent Iron Activated Peroxydisulfate Oxidation of Chloramphenicol in Aqueous Solutions: Fe-Speciation Analysis and Modeling Optimization

Yang

Xue

et al. 2019

Water

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“…Furthermore, k obs increased linearly with increasing [PS] 0 according to Figure 2(c), suggesting that the AMO degradation rate was in positively proportion to [PS] 0 . Similar phenomenon observed by Yang et al [33], Chen et al [34], and Nie et al [35] was possibly due to more SO 4…”

Section: Effects Of Initial Ps Concentration On Degradation Of Amosupporting

confidence: 79%

Oxidative Degradation of Amoxicillin in Aqueous Solution by Thermally Activated Persulfate

Zhao

Sun

et al. 2019

Journal of Chemistry

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Antibiotic residues and antibiotic resistance genes (ARGs) pose a great threat to public health and food security via the horizontal transfer in the food production chain. Oxidative degradation of amoxicillin (AMO) in aqueous solution by thermally activated persulfate (TAP) was investigated. The AMO degradation followed a pseudo-first-order kinetic model at all tested conditions. The pseudo-first-order rate constants of AMO degradation well-fitted the Arrhenius equation when the reaction temperature ranged from 35°C to 60°C, with the apparent activate energy of 126.9 kJ·mol−1. High reaction temperature, high initial persulfate concentration, low pH, high Cl− concentration, and humic acid (HA) concentration increased the AMO degradation efficiency. The EPR test demonstrated that both ·OH and SO4·− were generated in the TAP system, and the radical scavenging test identified that the predominant reactive radical species were SO4·− in aqueous solution without adjusting the solution pH. In groundwater and drinking water, AMO degradation suggested that TAP could be a reliable technology for water remediation contaminated by AMO in practice.

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“…This interface temperature was estimated to be at 1900 K [50], which is largely above temperatures necessary for decomposing PS (generally > 50 °C [51,52]). Once it forms, sulfate radical can further react with water molecules to produce more • OH radicals in the solution (reaction (14)) [53].…”

Section: Sonolytic Degradation Of Nbb In the Presence Of Psmentioning

confidence: 99%

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

Ferkous

Merouani

Hamdaoui

et al. 2017

Ultrasonics Sonochemistry

136

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This work explores the effect of persulfate (PS) on the sonochemical degradation of organic pollutants taking naphthol blue black (NBB), an anionic diazo dye, as a substrate model. The sonolytic experiments were conducted in the absence and presence of PS under various experimental conditions including acoustic power (10-80W), frequency (20 and 585kHz) and saturating gas (argon, air and nitrogen). Experimental results showed that PS decomposition into sulfate radical (SO) takes place by sonolysis and increasing PS concentration up to 1g/L would result in an increase in the NBB degradation rate. It was found that the PS-enhanced effect was strongly operating parameters dependent. The positive effect of PS decreased with increasing power and the best enhancing effect was obtained for the lowest acoustic power. Correspondingly, the PS-enhanced effect was more remarkable at low frequency (20kHz) than that observed at high frequency ultrasound (585kHz). Nitrogen saturating gas gave the best enhanced effect of PS than argon and air atmospheres. Theoretical (computer simulation of bubble collapse) and experimental measurements of the yields of free radical generation under the different experimental conditions have been made for interpreting the obtained effects of PS on the sonochemical degradation of the dye pollutant. The experimental findings were attributed to the fact that radical-radical recombination reactions occur at faster rate than the radical-organic reaction when the concentration of free radicals is too high (at higher sonochemical conditions).

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Oxidative degradation of diclofenac by thermally activated persulfate: implication for ISCO

Cited by 89 publications

References 44 publications

Hydrothermal Enhanced Nanoscale Zero-Valent Iron Activated Peroxydisulfate Oxidation of Chloramphenicol in Aqueous Solutions: Fe-Speciation Analysis and Modeling Optimization

Hydrothermal Enhanced Nanoscale Zero-Valent Iron Activated Peroxydisulfate Oxidation of Chloramphenicol in Aqueous Solutions: Fe-Speciation Analysis and Modeling Optimization

Oxidative Degradation of Amoxicillin in Aqueous Solution by Thermally Activated Persulfate

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

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