Physicochemical technologies for HRPs and risk control

Hu, Haidong; Xu, Ke

doi:10.1016/b978-0-12-816448-8.00008-3

Cited by 57 publications

(32 citation statements)

References 142 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The term adsorption refers to a mass transfer process where the pollutants in a solution are transferred to a solid adsorbent [64], which is frequently used for water and wastewater purification under the principles of pore filling, H bonding, hydrophobic interaction, and ion exchange [65,66]. The process under physical or chemical techniques contains many different adsorption forces that can effectively adsorb specific pollutants [67]. Physical adsorption is due to weak Van der Waals forces of attraction, and chemical adsorption is due to the strong covalent bond between the adsorbent and the adsorbate [34].…”

Section: Adsorption Methodsmentioning

confidence: 99%

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

et al. 2021

View full text Add to dashboard Cite

Research on contamination of groundwater and drinking water is of major importance. Due to the rapid and significant progress in the last decade in nanotechnology and its potential applications to water purification, such as adsorption of heavy metal ion from contaminated water, a wide number of articles have been published. An evaluating frame of the main findings of recent research on heavy metal removal using magnetic nanoparticles, with emphasis on water quality and method applicability, is presented. A large number of articles have been studied with a focus on the synthesis and characterization procedures for bare and modified magnetic nanoparticles as well as on their adsorption capacity and the corresponding desorption process of the methods are presented. The present review analysis shows that the experimental procedures demonstrate high adsorption capacity for pollutants from aquatic solutions. Moreover, reuse of the employed nanoparticles up to five times leads to an efficiency up to 90%. We must mention also that in some rare occasions, nanoparticles have been reused up to 22 times.

show abstract

Section: Adsorption Methodsmentioning

confidence: 99%

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Figure 5 shows the As(III) removal efficiency at two different adsorbent concentrations (0.01 and 0.1 g/L). The results show the adsorption capacity as a function of the adsorbent concentration, and the adsorption process is strongly linked to the surface area available for the adsorption [29,30]. With an adsorbent dose of 0.1 g/L, As(III) removal reaches 97% with CoFe2O4 and 94% with MnFe2O4.…”

Section: Adsorptions Experimentsmentioning

confidence: 98%

“…Adsorption experiments were performed to eValuate the MNPs' arsenic adsorption capacities. Kinetic experiments were carried out at different adsorbent doses (0.01 and 0.1 g/L), different contact times (1,15,30,60, and 90 min), and different pH (6, 7, 8, and 8.5) by shaking the solution (480 rpm) with an initial As concentration of 45 µg/L at room temperature.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Morales-Amaya

Alarcón-Herrera

Astudillo-Sánchez³

et al. 2021

Water

View full text Add to dashboard Cite

Arsenic in water is currently a global concern due to the long-term exposure that could affect human health. In this study, magnetic nanoparticles (MNPs), CoFe2O4, and MnFe2O4 were successfully synthesized and applied to remove arsenic (As) from water. The MNPs were characterized using different techniques, such as scanning electron microscope (SEM), Brunauer–Emmet–Teller (BET), and photoelectron spectroscopy (XPS). The nanoscale size and the specific surface area achieved a fast, selective, and high As adsorption capacity. MNPs have a mesoporous structure with a mean pore diameter of 5 nm and a mean particle size of 30 nm. The adsorption capacity of these MNPs was determined through kinetic and equilibrium experiments, multilayer adsorption that obeyed the Freundlich model equation was observed, and the maximum adsorption capacities reached were 250 mg/g for CoFe2O4 and 230 mg/g for MnFe2O4. Furthermore, MNPs characteristics like regeneration and reuse, several pH tolerances, non-ion interference, and effective As removal from groundwater samples confirms the nanomaterials’ potential for future applications in water treatment systems combined with magnetic separation.

show abstract

“…Therefore, when it is used as fillers in non-conductive polymers, they become electrical conductive. 13 Kasim et al prepared the nanocomposite by mixing natural rubber with GR. They laminated Rubber/GR nanocomposites with cord fabric (PA66) and vulcanized them with temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrical properties of hybrid nanocomposites containing different fillers on pressure sensor applications under different loading

Kasım¹,

Demir²

2021

Journal of Composite Materials

View full text Add to dashboard Cite

Conductive elastomeric nanocomposites (CEMs) were prepared in two stages to control the precision of pressure sensors. Carbon-based nanofillers such as multi-walled carbon nanotubes (MWCNT) or graphene (GR) were added to the rubber matrix. For Rubber/MWCNT composites, unfunctionalized (U-MWCNT) and –COOH functionalized MWCNT (F-MWCNT) fillers were synthesized. The properties of the CEMs and the synergistic improvements between the fillers and rubber matrix in composites were also investigated. SEM images show that F-MWCNT fillers were dispersed homogeneously in the composites and they interacted with rubber better than other carbon fillers. The piezoresistivity properties of the CEMs before and after compression were determined using the four-probe method by cyclic loading in 1 mm increments between 1.5 mm and 3.5 mm. F-MWCNT filled composites had higher strength than others when they were compressed by 2.5 mm. The F-MWCNT and GR filled nanocomposites possessed the best resistivity for pressure sensors when compressed at 2.5 mm (for F-MWCNT 1.1E + 08 Ω, GR 5.28E + 06 Ω). These nanocomposites are promising pressures sensors for air suspension systems.

show abstract

Physicochemical technologies for HRPs and risk control

Cited by 57 publications

References 142 publications

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Investigation of electrical properties of hybrid nanocomposites containing different fillers on pressure sensor applications under different loading

Contact Info

Product

Resources

About