Simultaneous catalytic degradation of 2,4-D and MCPA herbicides using sulfate radical-based heterogeneous oxidation over persulfate activated by natural hematite (α-Fe 2 O 3 /PS)

Kermani, Majid; Mohammadi, Farzad; Kakavandi, Babak; Esrafili, Ali; Rostamifasih, Zeinab

doi:10.1016/j.jpcs.2018.02.009

Cited by 105 publications

(22 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observed decrease in MeP oxidation rate confirms that both SO 4 •− and • OH radicals contributed to the degradation of MeP in the SPS/NM‐SCM system. It should be noted that oxidation of H 2 O and hydroxide ions (OH − ) by SO 4 •− radicals can take place in the liquid phase to convert them into • OH radicals according to Eqns (12) and (13), so the oxidative degradation of MeP molecules occurred simultaneously in the liquid phase and on the surfaces of the catalyst by reaction with • OH and SO 4 •− radicals . However, the greater decrease in degradation in the presence of IPA compared with TBA suggests that SO 4 •− radicals played the main role in MeP degradation.…”

Section: Resultsmentioning

confidence: 99%

“…•− radicals. 33 However, the greater decrease in degradation in the presence of IPA compared with TBA suggests that SO 4 •− radicals played the main role in MeP degradation. It also explains why SO 4…”

Section: Quenching Agents and Identification Of Predominant Reactive mentioning

confidence: 99%

“…The role of natural minerals in persulfate activation as Fenton-like systems, such as goethite, hematite, pyrite and siderite, for the treatment of persistent organic pollutants has been reported in the literature. 20,33,34 Among these natural minerals, the application of magnetite as a catalyst in heterogeneous Fenton oxidation has received considerable attention because of its large quantities in natural environments and low cost. 35 Naturally magnetic semiconductor mineral (NM-SCM) is a good and efficient heterogeneous catalyst to activate persulfate for remediation of total petroleum hydrocarbon (TPH)-contaminated soil.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

Rostamifasih

Pasalari

Mohammadi

et al. 2019

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

BACKGROUND In this study, a naturally magnetic semiconductor mineral (NM‐SCM) was used as a highly active, easily separable and green catalyst to activate persulfate (SPS) for the degradation of methylparaben (MeP) in aqueous solution by a heterogeneous catalyst system (SPS/NM‐SCM). NM‐SCM properties were characterized using field emission scanning electron microscope (FESEM), Brunauer–Emmett–Teller (BET), X‐ray diffraction (XRD), energy‐dispersive X‐ray (EDX) and vibrating sample magnetometer (VSM) analyses. The effects of contributing factors such as solution pH, NM‐SCM loading, SPS dosage and initial MeP concentration on MeP degradation were analyzed using response surface methodology (RSM) and Box–Behnken design (BBD). RESULTS The RSM model obtained from the present study (R2 > 0.99) showed a suitable correlation between the predicted values and experimental results of MeP degradation. Under optimized conditions (pH 6.5, SPS 5 mmol L−1, NM‐SCM 0.3 g L−1 and MeP 10 µmol L−1), a removal efficiency of 99.5% and a mineralization degree of 37% were achieved. The removal efficiency of MeP was reduced in the presence of inorganic ions as follows: chloride > nitrate > carbonate > phosphate. After five successive catalyst reuses, the degradation efficiency was >90%, indicating the excellent potential reusability of NM‐SCM catalyst. CONCLUSION Owing to the generation of highly reactive oxidizing species (SO4•−) and easy separation of the catalyst, the integration of NM‐SCM and SPS has great potential for the degradation of MeP from water and wastewater matrices. © 2019 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Quenching Agents and Identification Of Predominant Reactive mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

Rostamifasih

Pasalari

Mohammadi

et al. 2019

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

show abstract

“…FeOOH could be converted to Fe 2 O 3 due to poor chemical stability (Equation (16)) [63]. Fe 3 O 4 and Fe 2 O 3 were both reported in previous persulfate activation investigations [65,66], thus, it could be induced that Fe 3 O 4 and Fe 2 O 3 gradually become the persulfate activators. Fe 3 O 4 and Fe 2 O 3 on the surface of nZVI slacken the release of Fe 2+ from nZVI, eliminating the scavenging effects of Fe 2+ on sulfate radicals.…”

Section: Optimization Of Removal Processmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…Reviewing the previous studies illustrated that several type of methods including electrochemical, electrochemical coagulation, coupled Fenton and biological oxidation and oxidation processes have evolved for the degradation of 2,4-D herbicide. 14,38,[42][43][44][45][46][47] Table 7, compares these processes from the viewpoint of initial pH, electrolysis time, initial 2,4-D herbicide concentration, current density, electrode type, degradation efficiency and COD removal with the prepared electrode in this research. According to Table 7, our data in the most cases are superior to previously reported data.…”

Section: Comparison Of Degradation Of 24-d Herbicide Using Other Metmentioning

confidence: 99%

Electrodegradation of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution using three-dimensional electrode reactor with G/β-PbO₂anode: Taguchi optimization and degradation mechanism determination

et al. 2018

View full text Add to dashboard Cite

show abstract

Simultaneous catalytic degradation of 2,4-D and MCPA herbicides using sulfate radical-based heterogeneous oxidation over persulfate activated by natural hematite (α-Fe 2 O 3 /PS)

Cited by 105 publications

References 48 publications

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

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

Electrodegradation of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution using three-dimensional electrode reactor with G/β-PbO₂anode: Taguchi optimization and degradation mechanism determination

Contact Info

Product

Resources

About

Simultaneous catalytic degradation of 2,4-D and MCPA herbicides using sulfate radical-based heterogeneous oxidation over persulfate activated by natural hematite (α-Fe 2 O 3 /PS)

Cited by 105 publications

References 48 publications

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

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

Electrodegradation of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution using three-dimensional electrode reactor with G/β-PbO2anode: Taguchi optimization and degradation mechanism determination

Contact Info

Product

Resources

About

Electrodegradation of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution using three-dimensional electrode reactor with G/β-PbO₂anode: Taguchi optimization and degradation mechanism determination