ArticleEnvironmental science and pollution research international2016
Oxidative degradation of diclofenac by thermally activated persulfate: implication for ISCO.
Article in Environmental science and pollution research international, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 103 citations in OpenAlex.
- Visible Light Induced Photocatalytic Degradation of Diclofenac in Aqueous Solution Using Fabricated ZnO/g-CACS omega · 2024Article
- Treatment of Winery Wastewater by Combined Almond Skin Coagulant and Sulfate Radicals: Assessment of HSO5- Activators.International journal of environmental research and public health · 2023Article
- Diclofenac degradation by activating peroxydisulfate via well-dispersed GO/CuEnvironmental science and pollution research international · 2022Article
- Dodecylpyridinium chloride removal by persulfate activation using UVA radiation or temperature: experimental design and kinetic modeling.Environmental science and pollution research international · 2021Article
- Modified nanoscale zero-valent iron in persulfate activation for organic pollution remediation: a review.Environmental science and pollution research international · 2021Review
- Synthesis of Spinel Ferrite MFeFrontiers in chemistry · 2020Article
- Article
- Efficient abatement of an iodinated X-ray contrast media iohexol by Co(II) or Cu(II) activated sulfite autoxidation process.Environmental science and pollution research international · 2019Article
- Oxidative removal of metronidazole from aqueous solution by thermally activated persulfate process: kinetics and mechanisms.Environmental science and pollution research international · 2018Article
- Oxidation of winery wastewater by sulphate radicals: catalytic and solar photocatalytic activations.Environmental science and pollution research international · 2017Article
- Magnetic EDTA functionalized CoFeEnvironmental science and pollution research international · 2017Article
- Excellent performance of cobalt-impregnated activated carbon in peroxymonosulfate activation for acid orange 7 oxidation.Environmental science and pollution research international · 2017Article
- Activated carbon fiber for heterogeneous activation of persulfate: implication for the decolorization of azo dye.Environmental science and pollution research international · 2016Article
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4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Diclofenac (DCF), one of the typically recalcitrant pharmaceuticals, has been frequently detected in groundwater in recent years. This work investigated the performance of DCF degradation by thermally activated persulfate (PS) to further understand its application in in situ chemical oxidation (ISCO) for DCF-contaminated groundwater. The effects of various factors, including activation temperature, solution pH, PS/DCF ratio, and common constitutes, e.g., HCO3(-), Cl(-) and humic acid, and the toxicity of transformation products were evaluated. The results indicated that the oxidation of DCF was well-fitted with a pseudo-first-order kinetic model, and the rate constants increased with the elevated temperatures. The rate constants from 50-70 °C were further fitted to the Arrhenius equation, yielding an activation energy of 157.63 kJ·mol(-1). In addition, the oxidation of DCF was highly pH-dependent, with the rate constants rapidly decreased from pH 5 to 7, then slightly increased at the alkaline pH. The presence of a low dosage of Cl(-)(0-10 mM) promoted the degradation of DCF, whereas high Cl(-) addition (>10 mM) inhibited DCF degradation. HCO3(-) exhibited a negligible effect on DCF removal, while natural organic matters, e.g., humic acids, lightly inhibited DCF degradation. The rapid degradation of DCF was also confirmed in the real groundwater sample, which might be attributed to the pH drop during the reaction. Moreover, the radical quenching experiments revealed that sulfate radicals (SO4·-)) was the dominant reactive species for DCF oxidation. Finally, the acute toxicity of the DCF solution, as tested with a bioluminescent assay, was gradually decreased during the reaction, indicating that a thermally activated PS oxidation was a promising alternative approach for DCF-contaminated groundwater remediation.
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