The role of nanotechnology in tackling global water challenges

Mauter, Meagan S.; Zucker, Ines; Perreault, François; Werber, Jay R.; Kim, Jae Hong; Elimelech, Menachem

doi:10.1038/s41893-018-0046-8

Cited by 450 publications

(247 citation statements)

References 120 publications

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“…Nanomaterials of various chemical composition, shape, and dimensions have been studied for pathogen inactivation, contaminant removal and transformation, and membrane separations, for the enhancement of existing water treatment technologies. These studies indicated varying activity levels and prove to be very reliable in future (Mauter et al, 2018). Nanotechnology in past few years emerged as highly advanced and reliable technique in many areas including water treatment units.…”

Section: Application In Contaminated Water Treatmentmentioning

confidence: 79%

Nanomaterials for removal of waterborne pathogens

Ojha

2020

Waterborne Pathogens

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Section: Application In Contaminated Water Treatmentmentioning

confidence: 79%

Nanomaterials for removal of waterborne pathogens

Ojha

2020

Waterborne Pathogens

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“…It is defined as the control of matter at the atomic and molecular levels (Kargozar & Mozafari, ). Some fields where nanotechnology has been applied are the food industry, (Karimi, Sadeghi, & Kokini, ), food safety (Krishna et al., ), the cosmeceutical industry (Kaul, Gulati, Verma, Mukherjee, & Nagaich, ), water treatment (Mauter et al., ), and health (Tapia‐Hernández et al., ). Within nanotechnology, nanoencapsulation is a strategy in recent years for the protection of food ingredients and nutraceuticals (Assadpour & Jafari ; Liang et al., ).…”

Section: Introductionmentioning

confidence: 99%

Gallic Acid‐Loaded Zein Nanoparticles by Electrospraying Process

Tapia-Hernández

Del‐Toro‐Sánchez

Cinco-Moroyoqui

et al. 2019

Journal of Food Science

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Currently, electrospraying is a novel process for obtaining the nanoparticles from biopolymers. Zein nanoparticles have been obtained by this method and used to protect both hydrophilic and hydrophobic antioxidant molecules from environmental factors. The objective of this work was to prepare and characterize gallic acid‐loaded zein nanoparticles obtained by the electrospraying process to provide protection to gallic acid from environmental factors. Thus, it was related to the concentration of gallic acid in physicochemical and rheological properties of the electrosprayed solution, and also to equipment parameters, such as voltage, flow rate, and distance of the collector in morphology, and particle size. The physicochemical properties showed a relationship in the formation of a Taylor cone, in which at a low concentration of gallic acid (1% w/v), low viscosity (0.00464 ± 0.00001 Pa·s), and density (0.886 ± 0.00002 g/cm3), as well as high electrical conductivity (369 ± 4.3 µs/cm), forms a stable cone‐jet mode. The rheological properties and the Power Law model of the gallic acid‐zein electrosprayed solution demonstrated Newtonian behavior (n = 1). The morphology and size of the particle were dependent on the concentration of gallic acid. Electrosprayed parameters with high voltage (15 kV), low flow rate (0.1 mL/hr), and short distance (10 cm) exhibited a smaller diameter and spherical morphology. FT–IR showed interaction in the gallic acid‐loaded zein nanoparticle by hydrogen bonds. Therefore, the electrospraying process is a feasible technique for obtaining gallic acid‐loaded zein nanoparticles and providing potential protection to gallic acid from environmental factors.

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“…Through manipulation of material size, morphology, and chemical structure, nanomaterials can gain exceptional adsorptive and catalytic properties useful for water decontamination. 6 Among nano-assisted AOPs, heterogeneous iron-free Fenton-like processes frequently rely on nanoscale transition metal oxide catalysts to facilitate effective contaminant degradation, many times overcoming the limitations of traditional Fenton processes. 7 Cerium oxide (CeO 2 or ceria)-based materials are widely used in catalytic industrial applications, as well as in mechanical polishing, UV-shielding, and solid-oxide fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

et al. 2019

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This study demonstrates the fabrication of nanoceria-immobilized silica nanofibers for efficient water decontamination with easy reuse and regeneration properties. Commercially-available ceria (CeO 2 ) nanoparticles were immobilized on electrospun silica nanofiber mats. Optimal conditions for both oxidation of model trace organic compounds (TrOCs) and hydroxyl-radical formation were determined in batch experiments with ceria nanoparticles. Kinetic experiments showed comparable oxidation rates of positively-and neutrally-charged TrOCs (95 and 98%, respectively) by the nanofiber composites at pH 2 in 0.5 mM H 2 O 2 . We demonstrated the reuse properties of the ceria nanofiber composites, finding less than a 15% reduction in oxidation performance after 10 cycles. In addition to this oxidative performance, the electrospun CeO 2 nanofiber composites are also applicable for adsorbing the persistent contaminant perfluorooctanesulfonic acid (PFOS) through electrostatic interactions. Regeneration of the fibers was enabled through a one-hour heat treatment at 550 C in air. Overall, results from this study show that the nanoceria-immobilized silica nanofibers can be used as efficient oxidative and adsorptive media to treat TrOCs in acidic waters, without use of an additional catalyst separation stage from solution.

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The role of nanotechnology in tackling global water challenges

Cited by 450 publications

References 120 publications

Nanomaterials for removal of waterborne pathogens

Nanomaterials for removal of waterborne pathogens

Gallic Acid‐Loaded Zein Nanoparticles by Electrospraying Process

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

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