Degradation of progesterone by coexisting free radical and nonradical pathways in the CuO/HNTs-PS system

Huang, Zhuofan; Lin, Qintie; Luo, Haoyu; Guo, Pengran; Weng, Qingsong; Yan, Lei; Cheng, Shuailong; Liu, Shuangshuang

doi:10.1016/j.cej.2020.125458

Cited by 35 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photodegradation of DRO leads to the appearance of 383 m/z, 343 m/z and 341 m/z peaks (see Scheme 2 and TableS2). The 383 m/z by-product could be due to the addition of OH radicals onto the five-membered ring, similar to what was reported by Huang et al[51] where the progesterone molecule (progenitor of the class to which DRO belongs) was studied. Subsequently, the oxidation process leads to the formation of other by-products, shorter than the starting molecules II and III.HPLC/MS analyses were also carried out to study the photodegradation intermediates of the oxazepam molecule (see TableS3).…”

supporting

confidence: 83%

Solvothermally Grown Oriented WO3 Nanoflakes for the Photocatalytic Degradation of Pharmaceuticals in a Flow Reactor

Cescon,

Stevanin,

Ardit

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Contamination by pharmaceuticals adversely affects the quality of natural water, causing environmental and health concerns. In this study, target drugs (oxazepam, OZ, 17-α-ethinylestradiol, EE2, and drospirenone, DRO), which have been extensively detected in the effluents of WWTPs over the past decades, were selected. We report here a new photoactive system, operating under visible light, capable of degrading EE2, OZ and DRO in water. The photocatalytic system comprised glass spheres coated with nanostructured, solvothermally treated WO3 that improves the ease of handling of the photocatalyst and allows for the implementation of a continuous flow process. The photocatalytic system based on solvothermal WO3 shows much better results in terms of photocurrent generation and photocatalyst stability with respect to state-of-the-art WO3 nanoparticles. Results herein obtained demonstrate that the proposed flow system is a promising prototype for enhanced contaminant degradation exploiting advanced oxidation processes.

show abstract

supporting

confidence: 83%

Solvothermally Grown Oriented WO3 Nanoflakes for the Photocatalytic Degradation of Pharmaceuticals in a Flow Reactor

Cescon,

Stevanin,

Ardit

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…− scavenger (Text S3). 59 As shown in Figure 5c, the addition of quenchers modestly inhibited the removal of Cu-EDTA, showcasing an 11.1− 19.7% reduction. We also calculated the contribution ratio of active species and direct oxidation based on the pseudo-firstorder rate constants from the quenching experiment.…”

Section: Mechanisms Of Ourmentioning

confidence: 82%

“…To discern the contributions of free radicals and direct oxidation, we conducted quenching experiments utilizing tertiary butanol (TBA) as a • OH scavenger and methanol (MeOH) as a • OH and • SO 4 – scavenger (Text S3). As shown in Figure c, the addition of quenchers modestly inhibited the removal of Cu-EDTA, showcasing an 11.1–19.7% reduction. We also calculated the contribution ratio of active species and direct oxidation based on the pseudo-first-order rate constants from the quenching experiment.…”

Section: Resultsmentioning

confidence: 99%

Solar-Driven Ion Confinement for Synergetic Pollutants Remediation and Valuable Metal Recovery in Wastewater

Dang,

Wang,

Sun

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

With the increasing demand for sustainable and resource-efficient wastewater treatment technologies, particularly in addressing metal−organic complexes contamination, herein we present a photoelectrochemical (PEC) wastewater treatment system based on a solar-driven ion confinement strategy. Employing a coordination polymer framework known as copper hexacyanoferrate (CuFe Prussian blue analogues (PBA)) as the host material for ion confinement, our strategy creates a pathway that couples photogenerated electrons with heavy-metal ions. This facilitates rapid electron transfer, enabling the effective separation of charge carriers and simultaneous capture of Cu(II) from wastewater. Taking Cu-ethylenediaminetetraacetic acid (EDTA) as a model pollutant, our proposed method demonstrates a removal efficiency of 92.2% for Cu-EDTA complexes and a recovery rate of 76.5% for Cu(II) under unbiased conditions. Analysis using X-ray absorption fine structure (XAFS) confirms the ion confinement of Cu(II) within the structure, distinguishing it from traditional PEC methods that focus on obtaining elemental Cu(0). Controlled release of metal ions not only meets specific requirements but also has significant potential for chemical recovery. Our proposed technology embodies the concept of utilizing pollutants to treat pollutants, making full use of concomitant heavy-metal ions in wastewater. It concurrently achieves the efficient degradation of organic pollutants while also facilitating resource recovery.

show abstract

“…48 After the reaction, the Cu 2p spectra showed peaks at 932.7 eV and 934.8 eV corresponding to Cu( i ) and Cu( ii ), respectively. 55 Partially absorbed Cu( ii ) on biochar was reduced to Cu( i ), further participating in the activation process. The transformation between Cu( i ) and Cu( ii ) species promoted the generation of radicals (eqn (5) and (6)).…”

Section: Resultsmentioning

confidence: 99%

Cu-Doped magnetic loofah biochar for tetracycline degradation via peroxymonosulfate activation

Zhang

Sun

et al. 2022

New J. Chem.

View full text Add to dashboard Cite

show abstract

Degradation of progesterone by coexisting free radical and nonradical pathways in the CuO/HNTs-PS system

Cited by 35 publications

References 50 publications

Solvothermally Grown Oriented WO3 Nanoflakes for the Photocatalytic Degradation of Pharmaceuticals in a Flow Reactor

Solvothermally Grown Oriented WO3 Nanoflakes for the Photocatalytic Degradation of Pharmaceuticals in a Flow Reactor

Solar-Driven Ion Confinement for Synergetic Pollutants Remediation and Valuable Metal Recovery in Wastewater

Cu-Doped magnetic loofah biochar for tetracycline degradation via peroxymonosulfate activation

Contact Info

Product

Resources

About