A review on the various beds used for immobilization of nanoparticles: Overcoming the barrier to nanoparticle applications in water and wastewater treatment

Atmianlu, Pourya Alipour; Badpa, Reza; Aghabalaei, Vahid; Baghdadi, Majid

doi:10.1016/j.jece.2021.106514

Cited by 40 publications

(17 citation statements)

References 193 publications

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“…Following the solution–diffusion theory, an increase in the nature of the membrane benefits water diffusion and controls the transport process through the membrane, improving its permeability. Conversely, immobilized nanoparticles have reduced active surface area, which entails the maximization of crucial parameters such as light irradiation and mass transfer ( Alipour Atmianlu et al, 2021 ). Different oxides nanoparticles (photocatalysts) have been explored, such as TiO 2 ( Martins et al, 2016 ), ZnO ( Shen et al, 2020 ), ZrO 2 ( Huang et al, 2021 ), WO 3 ( Gondal et al, 2017 ), as well as carbon-based nanomaterials such as GO ( Kusworo et al, 2021 ), g-C 3 N 4 ( Li et al, 2019 ) or SWCNTs ( Jue et al, 2020 ).…”

Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

“…Surface-coated membranes can be obtained by dip-coating, electrospraying, sputter deposition or gas-phase deposition which generates a nanoparticles layer on its surface ( Lakhotia et al, 2018 ; Alipour Atmianlu et al, 2021 ). Horovitz et al (2016) reported the dip-coating of a commercial alumina membrane with N-doped TiO 2 by the sol-gel method.…”

Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

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Colloidal nanomaterials for water quality improvement and monitoring

et al. 2022

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Water is the most important resource for all kind forms of live. It is a vital resource distributed unequally across different regions of the globe, with populations already living with water scarcity, a situation that is spreading due to the impact of climate change. The reversal of this tendency and the mitigation of its disastrous consequences is a global challenge posed to Humanity, with the scientific community assuming a major obligation for providing solutions based on scientific knowledge. This article reviews literature concerning the development of nanomaterials for water purification technologies, including collaborative scientific research carried out in our laboratory (nanoLAB@UA) framed by the general activities carried out at the CICECO-Aveiro Institute of Materials. Our research carried out in this specific context has been mainly focused on the synthesis and surface chemical modification of nanomaterials, typically of a colloidal nature, as well as on the evaluation of the relevant properties that arise from the envisaged applications of the materials. As such, the research reviewed here has been guided along three thematic lines: 1) magnetic nanosorbents for water treatment technologies, namely by using biocomposites and graphite-like nanoplatelets; 2) nanocomposites for photocatalysis (e.g., TiO2/Fe3O4 and POM supported graphene oxide photocatalysts; photoactive membranes) and 3) nanostructured substrates for contaminant detection using surface enhanced Raman scattering (SERS), namely polymers loaded with Ag/Au colloids and magneto-plasmonic nanostructures. This research is motivated by the firm believe that these nanomaterials have potential for contributing to the solution of environmental problems and, conversely, will not be part of the problem. Therefore, assessment of the impact of nanoengineered materials on eco-systems is important and research in this area has also been developed by collaborative projects involving experts in nanotoxicity. The above topics are reviewed here by presenting a brief conceptual framework together with illustrative case studies, in some cases with original research results, mainly focusing on the chemistry of the nanomaterials investigated for target applications. Finally, near-future developments in this research area are put in perspective, forecasting realistic solutions for the application of colloidal nanoparticles in water cleaning technologies.

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Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

Colloidal nanomaterials for water quality improvement and monitoring

et al. 2022

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“…While the small size of photocatalyst NPs renders them with high specific surface area and better photocatalytic efficiencies, the same makes it difficult and time-/energy-consuming to separate such small NPs from colloidal suspension after use. Hence, the use of nanomaterials in particulate/suspension form for real-life applications of water purification or wastewater treatment becomes nearly impractical due to the operational, energy-related, and economic difficulties associated with the management and recovery of nanomaterials. , Additionally, since the fate of nanomaterials and their impact on ecosystems and living beings are still little known, there is a growing environmental concern regarding their possible release into the environment. , Since these limitations are inherently related to the nanoscale nature of nanomaterials, anchoring or embedding them on/in macroscopic supports or substrates offers a viable and interesting option to design functional nanocomposite materials in suitable forms (membranes, thin film-coated surfaces/beads, and monolithic aerogels , ) for water treatment applications.…”

Section: Introductionmentioning

confidence: 99%

Designing Highly Photoactive Hybrid Aerogels for In-Flow Photocatalytic Contaminant Removal Using Silica-Coated Bacterial Nanocellulose Supports

Silva

Marchiori

Mattos

et al. 2023

ACS Appl. Mater. Interfaces

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This study explores the use of silica-coated bacterial nanocellulose (BC) scaffolds with bulk macroscopic yet nanometric internal pores/structures as functional supports for high surface area titania aerogel photocatalysts to design flexible, self-standing, porous, and recyclable BC@SiO2–TiO2 hybrid organic–inorganic aerogel membranes for effective in-flow photo-assisted removal of organic pollutants. The hybrid aerogels were prepared by sequential sol–gel deposition of the SiO2 layer over BC, followed by coating of the resulting BC@SiO2 membranes with a porous titania aerogel overlayer of high surface area using epoxide-driven gelation, hydrothermal crystallization, and subsequent supercritical drying. The silica interlayer between the nanocellulose biopolymer scaffold and the titania photocatalyst was found to greatly influence the structure and composition, particularly the TiO2 loading, of the prepared hybrid aerogel membranes, allowing the development of photochemically stable aerogel materials with increased surface area/pore volume and higher photocatalytic activity. The optimized BC@SiO2–TiO2 hybrid aerogel showed up to 12 times faster in-flow photocatalytic removal of methylene blue dye from aqueous solution in comparison with bare BC/TiO2 aerogels and outperformed most of the supported-titania materials reported earlier. Moreover, the developed hybrid aerogels were successfully employed to remove sertraline drug, a model emergent contaminant, from aqueous solution, thus further demonstrating their potential for water purification.

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“…Several methods, including adsorption, ozonation, advanced oxidation processes (AOPs), and nanofiltration, have been investigated to eliminate CECs from WWTP effluents (Afonso‐Olivares et al, 2016; Alipour Atmianlu et al, 2021; Altmann et al, 2014; Alves et al, 2018; Baghdadi et al, 2016; Cerreta et al, 2019; Chávez et al, 2017; Rizzo et al, 2015; Streicher et al, 2016; Zietzschmann et al, 2014). Heterogeneous catalytic systems based on sulfate radicals (SO 4 ˙ − ) have recently attracted interest because of the longer life span of sulfate radicals, higher stability at relevant temperatures, and higher standard redox potential (2.5–3.1 V) than hydroxyl radicals (˙OH) (Kilic et al, 2019; Zou et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Bisphenol A removal in treated wastewater matrix at neutral pH using magnetic graphite intercalation compounds as persulfate activators

Ranjbar

Ghiassi

Baghdadi

et al. 2023

Water Environment Research

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Effluents of municipal wastewater treatment plants (WWTPs) are major sources for releasing contaminants of emerging concern (CECs) into the aquatic environment, which can result in negative effects on aquatic ecosystems and, as a consequence, on humans. Herein, the graphite intercalation concept was used to synthesize heterogeneous catalysts to degrade bisphenol A (BPA) as a model CEC in municipal WWTP effluents at neutral pH. The catalyst was synthesized using the simple molten salt method and showed several benefits, such as iron leaching prevention and stability in environmental matrices. Different methods were applied to describe the catalyst's structural characteristics. The proposed system removed 99.3% of BPA in 75 min using 2 g/L of the synthesized catalyst and 1.19 g/L (5 mM) persulfate at neutral pH. Quenching experiments showed that catalytic activities and BPA removals were significantly aided by both radical and non‐radical pathways through the generation of free radicals and singlet oxygen (1O2). Furthermore, the reuse of recycled synthesized catalyst was investigated on treated urban wastewater, and the results showed that the catalyst could degrade BPA from the wastewater in consecutive cycles, demonstrating its applicability under real conditions. Practitioner Points BPA was effectively removed from the effluents of municipal WWTPs at neutral pH. A new catalyst (magnetic GIC) was fabricated for heterogeneous catalytic systems. The catalyst activates persulfate to generate free radicals and 1O2, indicating that radical and non‐radical pathways contribute to BPA degradation. The catalyst showed the ability to remove BPA even in the sixth cycle of use, demonstrating its stability and reusability.

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A review on the various beds used for immobilization of nanoparticles: Overcoming the barrier to nanoparticle applications in water and wastewater treatment

Cited by 40 publications

References 193 publications

Colloidal nanomaterials for water quality improvement and monitoring

Colloidal nanomaterials for water quality improvement and monitoring

Designing Highly Photoactive Hybrid Aerogels for In-Flow Photocatalytic Contaminant Removal Using Silica-Coated Bacterial Nanocellulose Supports

Bisphenol A removal in treated wastewater matrix at neutral pH using magnetic graphite intercalation compounds as persulfate activators

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