Cotransport of human adenoviruses with clay colloids and TiO2 nanoparticles in saturated porous media: Effect of flow velocity

Syngouna, Vasiliki I.; Chrysikopoulos, Constantinos V.; Kokkinos, Petros; Tselepi, Maria A.; Vantarakis, Apostolos

doi:10.1016/j.scitotenv.2017.04.082

Cited by 53 publications

(23 citation statements)

References 65 publications

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“…This is because these nanomaterials are considered to have higher adsorptive performance than conventional adsorbents. The nanosized metal oxides, for example, zinc oxide (ZnO) (Chouchene et al 2017) and titanium oxide (TiO 2 ) (Syngouna et al 2017), have exhibited favorable sorption toward organic and inorganic pollutants. The semiconductor photocatalyst, TiO 2 with external dimension in nanosize, has a wide range of applications in the field of cosmetic materials (Syngouna et al 2017) and decontamination or mineralization of compounds in water to harmless inorganic anions (Szczepanik et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The nanosized metal oxides, for example, zinc oxide (ZnO) (Chouchene et al 2017) and titanium oxide (TiO 2 ) (Syngouna et al 2017), have exhibited favorable sorption toward organic and inorganic pollutants. The semiconductor photocatalyst, TiO 2 with external dimension in nanosize, has a wide range of applications in the field of cosmetic materials (Syngouna et al 2017) and decontamination or mineralization of compounds in water to harmless inorganic anions (Szczepanik et al 2017). Thus, TiO 2 nanoparticles (T-NPs) have received much attention among researchers due to their extensive characteristics (Nasirian and Mehrvar 2016;Dariania et al 2016;Lin et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

et al. 2020

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Increase in industrial and anthropogenic activities leads to a decline in water quality. This necessitates the need for the removal of contaminants from industrial and domestic wastewater. Clay minerals are naturally abundant and non-toxic materials that found to be useful for remediation of emerging contaminants from wastewater. This review paper presents an insight into clay, the simplest material (in solgel techniques) for the synthesis of TiO 2 and ZnO, mechanisms of their reactions, analytical techniques used for characterizations, and their nanocomposites for wastewater treatment. Nanomaterials, such as nanoclay, titanium, and zinc oxide, have offered the opportunities of sequestering variety of pollutants in wastewater. TiO 2 and ZnO anchored on clay have been found to be good promising sequesters and have been explored for wastewater remediation via nanotechnology. This water treatment method includes adsorption/absorption, photocatalysis, and microbial disinfection. These nanocomposites provide more active surface sites and reduce the agglomeration of the nanoparticles, but leaching has been their shortcomings. To overcome this, the filtration technique may become significant for the removal and avoidance of fouling of wastewater. This can be achieved through the fabrication of nano-based filters using the nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

et al. 2020

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“…Several studies have focused specifically on colloid transport in the presence of metals [6], pesticides [7,8], and pharmaceuticals [9][10][11]. Some other studies have examined the co-transport of colloids with bio-colloids experimentally [12][13][14][15], and numerically [16]. However, the majority of colloid transport studies are focused on fully saturated porous media [17,18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Clay Colloid Particles on Formaldehyde Transport in Unsaturated Porous Media

Fountouli

Chrysikopoulos

2020

Water

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This study examines the effects of two representative colloid-sized clay particles (kaolinite, KGa-1b and montmorillonite, STx-1b) on the transport of formaldehyde (FA) in unsaturated porous media. The transport of FA was examined with and without the presence of clay particles under various flow rates and various levels of saturation in columns packed with quartz sand, under unsaturated conditions. The experimental results clearly suggested that the presence of clay particles retarded by up to ~23% the transport of FA in unsaturated packed columns. Derjaguin–Landau–Verwey–Overbeek (DLVO) interaction energy calculations demonstrated that permanent retention of clay colloids at air-water interfaces (AWI) and solid-water interfaces (SWI) was negligible, except for the pair (STx-1b)–SWI. The experimental results of this study showed that significant clay colloid retention occurred in the unsaturated column, especially at low flow rates. This deviation from DLVO predictions may be explained by the existence of additional non-DLVO forces (hydrophobic and capillary forces) that could be much stronger than van der Waals and double layer forces. The present study shows the important role of colloids, which may act as carriers of contaminants.

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“…This approach was observed as environmentally friendly and fast removal efficiency. TiO 2 nanoparticles displayed promising adsorption capacity toward organic and inorganic contaminants [252]. TiO 2 , the semiconductor photocatalyst exhibits a variety in the case of mineralization or decontamination of harmful substance in water [253].…”

Section: Titanium Oxide Nanoparticlesmentioning

confidence: 99%

Performance of Metal-Based Nanoparticles and Nanocomposites for Water Decontamination

Hyder

Mir

2021

Inorganic-Organic Composites for Water and Wastewater Treatment

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Water comprises an integral component of human life and its accessibility is essential for all life in the entire planet. Due to climate changes and other manmade activities, the world is facing shortage of drinking water. There are a number of pollutants present in the water such as gases, chemicals and heavy metals. Therefore, it is imperative to decontaminate water for a healthy planet. There are numerous problems and challenges of wastewater treatment. For better ecological and health issues some measures are required to take in advance to avert possible evil or to secure good results. Metal-based nanomaterials have found exceptional use in the decontamination purpose due to their nature which arises from nanosize, such as better adsorption and catalytic activity. Metal-based nanomaterials can productively remove different contaminants from water and they have been effectively applied in decontamination of water. Due to having larger surface area and having ability to work at low concentration these metal-based nanomaterials are very efficient in wastewater treatment. Nanoengineered nanoparticles impart a promising and effective treatment method to wastewater and thus can be adapted simply. Modern techniques for treatment of wastewater must be cost-effective and accessible for commercial use. In this chapter, we outline the role of metal-based nanoparticles and nanocomposites applied in water decontamination. Moreover, we discuss the advantages, disadvantages, shortcomings and future prospects associated with these nanomaterials.

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Cotransport of human adenoviruses with clay colloids and TiO2 nanoparticles in saturated porous media: Effect of flow velocity

Cited by 53 publications

References 65 publications

Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

Effect of Clay Colloid Particles on Formaldehyde Transport in Unsaturated Porous Media

Performance of Metal-Based Nanoparticles and Nanocomposites for Water Decontamination

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