Aggregation of colloidal silica particles in the presence of fulvic acid, humic acid, or alginate: Effects of ionic composition

Abe, Tsutomu; Kobayashi, Satomi; Kobayashi, Motoyoshi

doi:10.1016/j.colsurfa.2010.11.052

Cited by 60 publications

(43 citation statements)

References 30 publications

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“…In the presence of HA, where carboxylic functional groups predominate, the significant decrease in the f-potential with Cu 2+ and Ca 2+ is also likely due to the binding of divalent cations to the carboxylic functional groups of HA adsorbed on the nHAP colloidal particles. The same result has also been observed elsewhere [22][23][24].…”

Section: Electrokinetic Potentials Of Nhap and Collector Surface At Vsupporting

confidence: 86%

“…However, there has been no systematic study so far on the transport behavior of nHAP, especially HA-modified nHAP in saturated packed column. Meanwhile, it is worth noting that in the presence of NOM and Ca 2+ (e.g., groundwater environment), enhanced aggregation is observed due to the bridging of the nanoparticles by the microgels formed by the Ca-mediated bridging of NOM [22][23][24]. Therefore, it is crucial to investigate the impact of the divalent Ca 2+ cation on the transport behavior of HA-modified nHAP colloidal particles in saturated packed columns.…”

Section: Introductionmentioning

confidence: 98%

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Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

Wang

Chu

Paradelo

et al. 2011

Journal of Colloid and Interface Science

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Section: Electrokinetic Potentials Of Nhap and Collector Surface At Vsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 98%

Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

Wang

Chu

Paradelo

et al. 2011

Journal of Colloid and Interface Science

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“…For the use of rigid polymer, optimum flocculation can take place at the flocculant dosage being far from the IEP, indicating the possibility of bridging flocculation [3,4]. In addition, the kinetic aspects of polymer behaviors and the presence of multivalent ions significantly affect the process of flocculation with polyelectrolytes [3,5,6].…”

Section: Introductionmentioning

confidence: 98%

Coagulation and charging of latex particles in the presence of imogolite

Kobayashi

Nitanai

Satta

et al. 2013

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…The publications analyzed here report the carbon distribution as obtained from 13 C-NMR spectra. Different authors sometimes use different regions of the chemical shift to quantify different carbon types such as aliphatic, heteroaliphatic, acetal, aromatic, carboxyl and carbonyl carbon.…”

Section: Methodsmentioning

confidence: 99%

“…Some types of DOM, such as fulvic and humic acids, electrostatically stabilize ENPs via the adsorption of the electrically charged DOM on the ENP surface (12)(13)(14)(15)(16), where the strength of the stabilization is correlated (although not linearly) with the amount of DOM adsorbed (17) and varies with its chemical structure (11,12,18,19). In other settings, particularly in the presence of divalent cations, DOM such as polysaccharides and polypeptides enhances the aggregation of ENPs by forming bridges between the particles (20)(21)(22)(23)(24).…”

mentioning

confidence: 99%

A network perspective reveals decreasing material diversity in studies on nanoparticle interactions with dissolved organic matter

Sani-Kast

Labille

Ollivier

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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Dissolved organic matter (DOM) strongly influences the properties and fate of engineered nanoparticles (ENPs) in aquatic environments. There is an extensive body of experiments on interactions between DOM and ENPs and also larger particles. [We denote particles on the nano-and micrometer scale as particulate matter (PM).] However, the experimental results are very heterogeneous, and a general mechanistic understanding of DOM-PM interactions is still missing. In this situation, recent reviews have called to expand the range of DOM and ENPs studied. Therefore, our work focuses on the diversity of the DOM and PM types investigated. Because the experimental results reported in the literature are highly disparate and difficult to structure, a new format of organizing, visualizing, and interpreting the results is needed. To this end, we perform a network analysis of 951 experimental results on DOM-PM interactions, which enabled us to analyze and quantify the diversity of the materials investigated. The diversity of the DOM-PM combinations studied has mostly been decreasing over the last 25 y, which is driven by an increasing focus on several frequently investigated materials, such as DOM isolated from fresh water, DOM in whole-water samples, and TiO 2 and silver PM. Furthermore, there is an underrepresentation of studies into the effect of particle coating on PM-DOM interactions. Finally, it is of great importance that the properties of DOM used in experiments with PM, in particular the molecular weight and the content of aromatic and aliphatic carbon, are reported more comprehensively and systematically.nanoparticles | dissolved organic matter | environmental fate | network analysis | experimental design T he development and use of nanotechnology results in the release of engineered nanoparticles (ENPs) to the environment (1, 2). Much effort in current research is put into assessing the environmental risks of ENPs, which requires the understanding of the fate and distribution of ENPs in different environmental media, as well as their potential toxicity (3-6). Dissolved organic matter (DOM) (e.g., humic substances, polysaccharides, and proteins) is ubiquitous in aquatic systems and is known to interact with ENPs and modify their surface properties (7). DOM has been shown to either stabilize or destabilize aqueous ENP suspensions, depending on DOM properties and medium composition (8, 9). The effects of DOM on the stability of ENP suspensions are expected to strongly influence the mobility and distribution of ENPs in the environment (10).The extraordinary variability in DOM effects on ENPs originates from the fact that the interactions between DOM and ENPs depend on numerous interrelated factors, such as pH and ionic strength of the media, the particles' surface properties and size, and the chemical composition and concentration of the DOM (11). Some types of DOM, such as fulvic and humic acids, electrostatically stabilize ENPs via the adsorption of the electrically charged DOM on the ENP surface (12-16), where the str...

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Aggregation of colloidal silica particles in the presence of fulvic acid, humic acid, or alginate: Effects of ionic composition

Cited by 60 publications

References 30 publications

Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

Coagulation and charging of latex particles in the presence of imogolite

A network perspective reveals decreasing material diversity in studies on nanoparticle interactions with dissolved organic matter

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