Comparison kinetics studies of Cu(II) adsorption by multi-walled carbon nanotubes in homo and heterogeneous systems: Effect of nano-SiO2

Sun, Weiling; Xia, Jing; Shan, Yingchun

doi:10.1016/j.cej.2014.03.094

Cited by 67 publications

(26 citation statements)

References 41 publications

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“…Hydrogen bonding typically occurs between nanoparticles or colloids with abundant oxygen-containing groups such as functionalized NPs, metallic oxides NPs, clays, and NOM etc. [99,128,129,148]. Sun et al [129] reported that SiO 2 NPs attached to CNT surfaces via both van der Waals forces and hydrogen bonds.…”

Section: Hydrogen Bondingmentioning

confidence: 99%

“…[99,128,129,148]. Sun et al [129] reported that SiO 2 NPs attached to CNT surfaces via both van der Waals forces and hydrogen bonds. In fact, heteroaggregation via hydrogen bonding has been employed for separation/purification of NPs using functionalized or decorated magnetic NPs [149,150].…”

Section: Hydrogen Bondingmentioning

confidence: 99%

“…Electrostatic interactions occur when the electrical double layers of NPs (and other colloids/surfaces) overlap [127]. Heteroaggregation may result from either weak electrostatic repulsion, attractive electrical fields from oppositely charged surfaces, and van der Waals forces, which tend to result in nonspecific spontaneous agglomeration [93,99,103,129,[134][135][136]. Heteroaggregation resulting from electrostatic interactions has been shown in NP-NP [99,127,136], NP-clay [128], NP-natural colloid [93,128,137,138], and NP-microorganism [107,108,116,117] interactions.…”

Section: Electrical Forcementioning

confidence: 99%

“…Lewis acid-base interactions are a type of chemical bonding that lead to heteroaggregation of NPs (and colloids in general) in aqueous and non-aqueous systems [47]. A heteroaggregation system can also arise from interplay of multiple mechanisms -both physical and chemical interactions [99,128,129]. The common mechanisms of heteroaggregation are shown in Fig.…”

Section: Mechanisms Of Heteroaggregationmentioning

confidence: 99%

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Heteroaggregation of nanoparticles with biocolloids and geocolloids

Wang

Adeleye

Huang

et al. 2015

Advances in Colloid and Interface Science

169

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The application of nanoparticles has raised concern over the safety of these materials to human health and the ecosystem. After release into an aquatic environment, nanoparticles are likely to experience heteroaggregation with biocolloids, geocolloids, natural organic matter (NOM) and other types of nanoparticles. Heteroaggregation is of vital importance for determining the fate and transport of nanoparticles in aqueous phase and sediments. In this article, we review the typical cases of heteroaggregation between nanoparticles and biocolloids and/or geocolloids, mechanisms, modeling, and important indicators used to determine heteroaggregation in aqueous phase. The major mechanisms of heteroaggregation include electric force, bridging, hydrogen bonding, and chemical bonding. The modeling of heteroaggregation typically considers DLVO, X-DLVO, and fractal dimension. The major indicators for studying heteroaggregation of nanoparticles include surface charge measurements, size measurements, observation of morphology of particles and aggregates, and heteroaggregation rate determination. In the end, we summarize the research challenges and perspective for the heteroaggregation of nanoparticles, such as the determination of α hetero values and heteroaggregation rates; more accurate analytical methods instead of DLS for heteroaggregation measurements; sensitive analytical techniques to measure low concentrations of nanoparticles in heteroaggregation systems; appropriate characterization of NOM at the molecular level to understand the structures and fractionation of NOM; effects of different types, concentrations, and fractions of NOM on the heteroaggregation of nanoparticles; the quantitative adsorption and desorption of NOM onto the surface of nanoparticles and heteroaggregates; and a better understanding of the fundamental mechanisms and modeling of heteroaggregation in natural water which is a complex system containing NOM, nanoparticles, biocolloids and geocolloids.

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Section: Hydrogen Bondingmentioning

confidence: 99%

Section: Hydrogen Bondingmentioning

confidence: 99%

Section: Electrical Forcementioning

confidence: 99%

Section: Mechanisms Of Heteroaggregationmentioning

confidence: 99%

See 2 more Smart Citations

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Wang

Adeleye

Huang

et al. 2015

Advances in Colloid and Interface Science

169

View full text Add to dashboard Cite

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“…We found that the parameters of pseudo-second-order are the best fitted to explain the data of contact time study. The separation of the variables of the pseudo-second-order in the differential form and integration are given in the following equation (Sun et al 2014);…”

Section: Kinetic Studiesmentioning

confidence: 99%

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

et al. 2017

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The removal of sodium ions from aqueous solutions by adsorption onto amorphous carbon thin film (ACTF) has been studied in batch mode. In this work, the ACTF as new adsorbent was synthesized based on rice straw, then its structure and properties were taken into consideration to study its ability to adsorb sodium ions from synthetic water. The influence of pH, contact time, and temperature of the ion adsorption on ACTF was also studied using batch tests. We found that the contact time of sodium adsorption and its isothermal adsorption studied were described by pseudo-second-order kinetic model and Langmuir isotherm, respectively. Our results indicated that the adsorption of sodium ions on ACTF become be stronger and depends on pH, furthermore, the maximum adsorption capacities of sodium on ACTF recorded 107, 120 and 135 mg g -1 at 35, 45, and 65°C. The thermodynamic parameters explain that the adsorption of sodium ions on ACTF is a spontaneous process and endothermic reaction. According to adsorption studies, we found that the ACTF can be used effectively for ion chromatography or desalinate sodium ion using ion exchange process in the hybrid desalination process with insignificant loss of adsorption capacity. However, the ACTF has better properties than any other carbon materials obtained from an agricultural byproduct.

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Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

Mallakpour

Khadem

2017

J of Applied Polymer Sci

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Poly(vinyl alcohol) (PVA) nanocomposite and modified CaCO 3 nanoparticles (NPs) were fabricated by ultrasound agitation method with particle content altering from 3, 5, and 8 wt %. The CaCO 3 surface was successfully treated by 10 wt % of bioactive dicarboxylic acid (DA). The influences of loading modified NPs on the thermal, mechanical, adsorption, contact angle, and physical properties of the poly(vinyl alcohol) nanocomposite films were thoroughly studied. The results showed that incorporation of modified CaCO 3 into the PVA matrix had better performance than the pure PVA. Meanwhile, tensile strength, Young's modulus, and thermal stability are enhanced from 33.36 MPa, 1.26 GPs, and 242.918C (neat PVA) to 81.7 MPa, 4.81 GPa, and 312.95 8C (PVA/ CaCO 3 -DA NC 5 wt %), respectively. Also, the adsorption capacity of the PVA/CaCO 3 -DA NCs 5 and 8 wt % revealed that the NC films could act as an appropriate absorbent for the removal of Cd(II) ions with maximum adsorption capacity of about 20.70 and 25.19 mg g 21 for Cd(II), respectively.

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Comparison kinetics studies of Cu(II) adsorption by multi-walled carbon nanotubes in homo and heterogeneous systems: Effect of nano-SiO2

Cited by 67 publications

References 41 publications

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

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Comparison kinetics studies of Cu(II) adsorption by multi-walled carbon nanotubes in homo and heterogeneous systems: Effect of nano-SiO2

Cited by 67 publications

References 41 publications

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

Poly(vinyl alcohol)/CaCO3‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

Contact Info

Product

Resources

About

Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption