Efficacy and reusability of mixed-phase TiO2–ZnO nanocomposites for the removal of estrogenic effects of 17β-Estradiol and 17α-Ethinylestradiol from water

Menon, N. Gayathri; George, Liya; Tatiparti, Sankara Sarma V.; Mukherji, Suparna

doi:10.1016/j.jenvman.2021.112340

Cited by 18 publications

(13 citation statements)

References 42 publications

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“…TiO 2 and ZnO nanoparticles have also been applied for removal of this type of pollutants from aqueous effluents [128, 129]. For example, a TiO 2 /ZnO nanocomposite with a Ti:Zn molar ratio of 1 : 0.3 was successfully applied to the photocatalytic degradation of steroid hormones, such as 17 α -ethinylestradiol (EE2) and 17 β -estradiol (E2), at low initial concentrations (from 50 μ g/L to 10 mg/L) [130]. Continuous exposure to these hormones, even at low concentrations, can disrupt the endocrine system [131], inducing serious adverse effects on human health such as infertility and increased incidence of breast, ovarian, and testicular cancer [132].…”

Section: Discussionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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The presence of heavy metals in wastewater, such as Ni, Pb, Cd, V, Cr, and Cu, is a serious environmental problem. This kind of inorganic pollutant is not biodegradable for several years, and its harmful effect is cumulative. Recently, semiconductor nanomaterials based on metal oxides have gained interest due to their efficiency in the removal of heavy metals from contaminated water, by inducing photocatalytic ion reduction when they absorb light of the appropriate wavelength. The most commonly applied semiconductor oxides for these purposes are titanium oxide (TiO2), zinc oxide (ZnO), and binary nanomaterials composed of both types of oxides. The main purpose of this work is to critically analyse the existent literature concerning this topic focusing specially in the most important factors affecting the adsorption or photocatalytic capacities of this type of nanomaterials. In particular, photocatalytic activity is altered by various factors, such as proportion of polymorphs, synthesis method, surface area, concentration of defects and particle size, among others. After a survey of the actual literature, it was found that, although these metal oxides have low absorption capacity for visible light, it is possible to obtain an acceptable heavy metal reduction performance by sensitization with dyes, doping with metallic or nonmetallic atoms, introduction of defects, or the coupling of two or more semiconductors.

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Section: Discussionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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“…A photocatalytic degradation performance of 94% was found, and no decrease in the catalyst activity was observed after four cycles, demonstrating high photocatalytic stability coupled with excellent reusability. TiO 2 -ZnO nanocomposites were tested by Menon et al in the photocatalytic removal of both 17βestradiol and 17α-ethinylestradiol under UV and visible irradiation [166]. A detailed study of the decomposition of both estrogenic compounds was conducted over a range of different initial ECs concentrations and 100% transformation was obtained in the best conditions under visible irradiation.…”

Section: Steroid Hormonesmentioning

confidence: 99%

“…Interestingly, the presence of ferric ion (Fe 3+ ), unintentionally added because of the precursors of the synthetic method, played a key role in the photocatalytic generation of hydroxyl radicals (•OH) and estriol (E3) degradation. An efficiency of up to 80% of E3 degradation was achieved in both irradiation regimes [166]. To obtain a fast and efficient degradation of estrone (E1) and 17α-ethinylestradiol (EE2), de Oliveira et al proposed the use of nanotubular oxide arrays grown on Ti-0.5wt% W under irradiation with ultraviolet (UV) and visible light [171].…”

Section: Steroid Hormonesmentioning

confidence: 99%

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

et al. 2022

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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.

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“…Human activities are one of the main sources of contamination, introducing a growing number of compounds into the water bodies. Such contaminants range from pathogens, heavy metal ions, and organic pollutants. − Among the latter are pharmaceuticals, endocrine disrupters, personal care products, dyes, phenols, and benzene compounds. ,− Addressing this challenge calls for affordable and efficient alternatives while being safe for humans and having minimal environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Fibrous TiO₂ Alternatives for Semiconductor-Based Catalysts for Photocatalytic Water Remediation Involving Organic Contaminants

et al. 2023

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Water decontamination remains a challenge in several developed and developing countries. Affordable and efficient approaches are needed urgently. In this scenario, heterogeneous photocatalysts appear as one of the most promising alternatives. This justifies the extensive attention that semiconductors, such as TiO 2 , have gained over the last decades. Several studies have evaluated their efficiency for environmental applications; however, most of these tests rely on the use of powder materials that have minimal to no applicability for large-scale applications. In this work, we investigated three fibrous TiO 2 photocatalysts, TiO 2 nanofibers (TNF), TiO 2 on glass wool (TGW), and TiO 2 in glass fiber filters (TGF). All materials have macroscopic structures that can be easily separated from solutions or that can work as fixed beds under flow conditions. We evaluated and compared their ability to bleach a surrogate dye molecule, crocin, under batch and flow conditions. Using black light (UVA/visible), our catalysts were able to bleach a minimum of 80% of the dye in batch experiments. Under continuous flow experiments, all catalysts could decrease dye absorption under shorter irradiation times: TGF, TNF, and TGW could, respectively, bleach 15, 18, and 43% of the dye with irradiation times as short as 35 s. Catalyst comparison was based on the selection of physical and chemical criteria relevant for application on water remediation. Their relative performance was ranked and applied in a radar plot. The features evaluated here had two distinct groups, chemical performance, which related to the dye degradation, and mechanical properties, which described their applicability in different systems. This comparative analysis gives insights into the selection of the right flow-compatible photocatalyst for water remediation.

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Efficacy and reusability of mixed-phase TiO2–ZnO nanocomposites for the removal of estrogenic effects of 17β-Estradiol and 17α-Ethinylestradiol from water

Cited by 18 publications

References 42 publications

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

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

Fibrous TiO₂ Alternatives for Semiconductor-Based Catalysts for Photocatalytic Water Remediation Involving Organic Contaminants

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Efficacy and reusability of mixed-phase TiO2–ZnO nanocomposites for the removal of estrogenic effects of 17β-Estradiol and 17α-Ethinylestradiol from water

Cited by 18 publications

References 42 publications

Heavy Metal Removal from Aqueous Effluents by TiO2 and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO2 and ZnO Nanomaterials

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

Fibrous TiO2 Alternatives for Semiconductor-Based Catalysts for Photocatalytic Water Remediation Involving Organic Contaminants

Contact Info

Product

Resources

About

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Fibrous TiO₂ Alternatives for Semiconductor-Based Catalysts for Photocatalytic Water Remediation Involving Organic Contaminants