Continuous process applied to degradation of triclosan and 2.8-dichlorodibenzene-p-dioxin

Fidelis, Michel Zampieri; Abreu, Eduardo; Josué, Tatiana Gulminie; Almeida, Lariana Negrão Beraldo de; Lenzi, Giane Gonçalves; Santos, Onélia Aparecida Andreo dos

doi:10.1007/s11356-020-10902-0

Cited by 4 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its use has been restricted in several counties because of concerns about bacterial resistance and endocrine disruption activity. The worries about the environmental consequences of the presence of triclosan (TCS) in water are also related to harmful by-products, such as polychlorinated dibenzodioxins [136].…”

Section: Triclosanmentioning

confidence: 99%

“…Such catalyst showed interesting results in the degradation of triclosan and ethinylestradiol under visible-light irradiation, particularly a TCS was degraded with up to 46% of the initial concentration within 8 h, under visible-light irradiation. A Fe/Nb 2 O 5 catalyst, prepared by impregnation of iron (1.5 wt% nominal load) on hydrated niobia and immobilized on calcium alginate spheres, was tested in triclosan degradation in a continuous flow photoreactor, under solar and artificial radiation [136]. The authors showed a promising removal of triclosan and 2,8-dichlorodibenzo-p-dioxin formed as intermediate, with a degradation efficacy up to 80% being achieved in the best operational conditions; however, they recorded a rapid loss of activity and did not investigate the relationships between properties and functionality.…”

Section: Triclosanmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

et al. 2022

View full text Add to dashboard Cite

Endocrine Disrupting Compounds (EDCs) comprise a class of natural or synthetic molecules and groups of substances which are considered as emerging contaminants due to their toxicity and danger for the ecosystems, including human health. Nowadays, the presence of EDCs in water and wastewater has become a global problem, which is challenging the scientific community to address the development and application of effective strategies for their removal from the environment. Particularly, catalytic and photocatalytic degradation processes employing nanostructured materials based on metal oxides, mainly acting through the generation of reactive oxygen species, are widely explored to eradicate EDCs from water. In this review, we report the recent advances described by the major publications in recent years and focused on the degradation processes of several classes of EDCs, such as plastic components and additives, agricultural chemicals, pharmaceuticals, and personal care products, which were realized by using novel metal oxide-based nanomaterials. A variety of doped, hybrid, composite and heterostructured semiconductors were reported, whose performances are influenced by their chemical, structural as well as morphological features. Along with photocatalysis, alternative heterogeneous advanced oxidation processes are in development, and their combination may be a promising way toward industrial scale application.

show abstract

Section: Triclosanmentioning

confidence: 99%

Section: Triclosanmentioning

confidence: 99%

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Heterogeneous photocatalysis is of great interest due to its applicability and high potential as a method of pollutant degradation, being able to mineralize such compounds and transform them into carbon dioxide, water and inorganic anions. This process is characterized by the activation of a semiconductor, such as TiO 2 , ZnO, ZrO 2 , Cu 2 O, SnO 2 , CdS by solar or artificial radiation [6,7]. Among the photocatalysts, TiO 2 is the most used due to its low cost, non-toxicity, and high chemical stability.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies, such as those conducted by Josué et al [9], applied Nb 2 O 5 in the reduction of Cr (VI) and obtained a 20% better result using Nb 2 O 5 when compared to TiO 2 . Fidelis et al [6], applied Fe/Nb 2 O 5 catalyst immobilized in the degradation of triclosan, achieving promising results. In this context, the present work was carried out using an Agpromoted Nb 2 O 5 -based catalyst for the photocatalytic process in the degradation of the hormone 17α-ethinylestradiol in water.…”

Section: Introductionmentioning

confidence: 99%

17 α-Ethinylestradiol Degradation in Continuous Process by Photocatalysis Using Ag/Nb2O5 Immobilized in Biopolymer as Catalyst

et al. 2022

View full text Add to dashboard Cite

This study describes the application of Ag/Nb 2 O 5 catalysts, suspension and spheres alginate immobilized for the degradation of 17α-Ethinylestradiol (EE2). The techniques used to characterize the photocatalysts were as follows: X-ray diffraction (XRD), N 2 adsorption-desorption analysis (BET), point charge zero charge (PZC), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Different catalyst calcination temperatures were studied by keeping the silver metal loading at 5%. Among the operational conditions analyzed were pH, catalyst concentration, the emitting source of radiation and the inlet flow rate (in continuous operation). The results of the experiments performed initially with the catalyst in suspension revealed that the highest catalytic activity in the degradation of EE2 was the 5%Ag/Nb 2 O 5 catalyst calcined at 973 K, which removed 77.7% of the initial pollutant concentration in 120 min of reaction. The immobilization of the catalyst in alginate spheres resulted in a degradation reduction, being able to degrade 69.2% of the initial EE2 in a batch system. In the continuous system, the immobilized catalyst obtained a total degraded of 37.3%, with a flow rate of 10 L•h −1 . Catalyst reuse was promising, even dropping the removal, degrading around 27% of the initial EE2 concentration in the third cycle of use. KeywordsSpheres alginate • Emerging pollutants • Contaminants of emerging concern • Advanced oxidation process • Thermal treatment

show abstract

Application of Structured Sol-Gel Nb2O5 Catalyst in Photocatalytic Continuous Process Prototype for Ibuprofen Degradation

Fidelis,

Abreu,

Andreo

et al. 2023

Top Catal

View full text Add to dashboard Cite

Continuous process applied to degradation of triclosan and 2.8-dichlorodibenzene-p-dioxin

Cited by 4 publications

References 47 publications

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

17 α-Ethinylestradiol Degradation in Continuous Process by Photocatalysis Using Ag/Nb2O5 Immobilized in Biopolymer as Catalyst

Application of Structured Sol-Gel Nb2O5 Catalyst in Photocatalytic Continuous Process Prototype for Ibuprofen Degradation

Contact Info

Product

Resources

About