Colloidal stability of nanosoil/nanofiber aqueous suspensions from natural environment in Hawaii

Assaf Azouri, Ming Ge, Kun Xun, Klaus Sattler, Joe Lichwa, Chittaranjan Ray

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Nanoparticles from iron-oxide rich soil and nanofibers from bark of the plumeria tree in Hawaii have been studied using photon correlation spectroscopy (PCS). Particles with sizes of several hundred nanometers have been investigated in aqueous suspension. The zeta potentials have been determined as a function of pH for soil, fiber, and the soil/fiber mixture. It is found that all three suspensions have negative zeta potentials and no isoelectric point within the pH range from 4 to 11. This shows that the suspensions are stable over a wide range of conditions. Both soil and fiber samples have approximately constant zeta potentials within this range. However, the zeta potential changes significantly for the nanosoil/nanofiber mixture when the pH is varied. We conclude that the nanoparticles of soil and fiber interact in the suspension and that this depends on the pH value of the suspension.

Original languageEnglish (US)
Title of host publicationProceedings of 2006 Multifunctional Nanocomposites International Conference
PublisherAmerican Society of Mechanical Engineers
ISBN (Print)0791837858, 9780791837856
DOIs
StatePublished - 2006
Externally publishedYes
Event2006 Multifunctional Nanocomposites International Conference - Honolulu, HI, United States
Duration: Sep 20 2006Sep 22 2006

Publication series

NameProceedings of 2006 Multifunctional Nanocomposites International Conference
Volume2006

Conference

Conference2006 Multifunctional Nanocomposites International Conference
Country/TerritoryUnited States
CityHonolulu, HI
Period9/20/069/22/06

ASJC Scopus subject areas

  • General Engineering

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