Colloidal stability of nanoparticles derived from simulated cloud-processed mineral dusts

Sergio Calabrese, Enikö Kadar, Andrew Fisher, Zongbo Shi, Jamie Lead, Eugenia Valsami-Jones, Björn Stolpe

Risultato della ricerca: Article

9 Citazioni (Scopus)

Abstract

Laboratory simulation of cloud processing of three model dust types with distinct Fe-content (Moroccan dust, Libyan dust and Etna ash) and reference goethite and ferrihydrite were conducted in order to gain a better understanding of natural nanomaterial inputs and their environmental fate and bioavailability. The resulting nanoparticles (NPs)were characterized for Fe dissolution kinetics, aggregation/size distribution, micromorphology and colloidal stability of particle suspensions using a multi-method approach. We demonstrated that the: (i) acid-leachable Fe concentration was highest in volcanic ash (1 mMg−1 dust) and was followed by Libyan and Moroccan dust with an order of magnitude lower levels; (ii) acid leached Fe concentration in the b20 nm fraction was similar in samples processed in the dark with those under artificial sunlight, but average hydrodynamic diameter of NPs after cloud-processing (pH ~ 6) was larger in the former; iii) NPs formed at pH ~ 6 were smaller and less poly-disperse than those at low pH, whilst unaltered zeta potentials indicated colloidal instability; iv) relative Fe percentage in the finer particles derived from cloud processing does not reflect Fe content of unprocessed dusts (e.g. volcanic ash N Libyan dust).
Lingua originaleEnglish
pagine (da-a)864-870
Numero di pagine7
RivistaScience of the Total Environment
Volume466-467
Stato di pubblicazionePublished - 2014

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Minerals
Dust
Ashes
Nanoparticles
dust
mineral
Volcanic Eruptions
volcanic ash
Processing
Acids
micromorphology
environmental fate
ferrihydrite
acid
Zeta potential
nanoparticle
goethite
Nanostructured materials
bioavailability
Suspensions

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cita questo

Calabrese, S., Kadar, E., Fisher, A., Shi, Z., Lead, J., Valsami-Jones, E., & Stolpe, B. (2014). Colloidal stability of nanoparticles derived from simulated cloud-processed mineral dusts. Science of the Total Environment, 466-467, 864-870.

Colloidal stability of nanoparticles derived from simulated cloud-processed mineral dusts. / Calabrese, Sergio; Kadar, Enikö; Fisher, Andrew; Shi, Zongbo; Lead, Jamie; Valsami-Jones, Eugenia; Stolpe, Björn.

In: Science of the Total Environment, Vol. 466-467, 2014, pag. 864-870.

Risultato della ricerca: Article

Calabrese, S, Kadar, E, Fisher, A, Shi, Z, Lead, J, Valsami-Jones, E & Stolpe, B 2014, 'Colloidal stability of nanoparticles derived from simulated cloud-processed mineral dusts', Science of the Total Environment, vol. 466-467, pagg. 864-870.
Calabrese, Sergio ; Kadar, Enikö ; Fisher, Andrew ; Shi, Zongbo ; Lead, Jamie ; Valsami-Jones, Eugenia ; Stolpe, Björn. / Colloidal stability of nanoparticles derived from simulated cloud-processed mineral dusts. In: Science of the Total Environment. 2014 ; Vol. 466-467. pagg. 864-870.
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AU - Valsami-Jones, Eugenia

AU - Stolpe, Björn

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AB - Laboratory simulation of cloud processing of three model dust types with distinct Fe-content (Moroccan dust, Libyan dust and Etna ash) and reference goethite and ferrihydrite were conducted in order to gain a better understanding of natural nanomaterial inputs and their environmental fate and bioavailability. The resulting nanoparticles (NPs)were characterized for Fe dissolution kinetics, aggregation/size distribution, micromorphology and colloidal stability of particle suspensions using a multi-method approach. We demonstrated that the: (i) acid-leachable Fe concentration was highest in volcanic ash (1 mMg−1 dust) and was followed by Libyan and Moroccan dust with an order of magnitude lower levels; (ii) acid leached Fe concentration in the b20 nm fraction was similar in samples processed in the dark with those under artificial sunlight, but average hydrodynamic diameter of NPs after cloud-processing (pH ~ 6) was larger in the former; iii) NPs formed at pH ~ 6 were smaller and less poly-disperse than those at low pH, whilst unaltered zeta potentials indicated colloidal instability; iv) relative Fe percentage in the finer particles derived from cloud processing does not reflect Fe content of unprocessed dusts (e.g. volcanic ash N Libyan dust).

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