Intraparticle surface diffusion of metal contaminants and their attenuation in microporous amorphous Al, Fe, and Mn oxides

Authors

L. Axe, Newark College of Engineering
P. Trivedi, University of Delaware

Document Type

Article

Publication Date

1-1-2002

Abstract

Intraparticle surface diffusion is an important and rate-limiting process in the sorption of metal ions to microporous sorbents such as those of hydrous amorphous Al (HAO), Fe (HFO), and Mn (HMO) oxides; these minerals are abundant in the environment, exhibiting a high affinity for metal contaminants. In aquatic systems representative of natural environments, internal micropore surfaces of HAO, HFO, and HMO can account for 40 to 90% of the sorption sites. Surface diffusivities have been observed to range between 10^-16 and 10^-10 cm² s^-1 for metals including Sr, Cd, Zn, and Ni. The combination of significant microporosity and small diffusivities results in the amorphous oxides acting as natural attenuating sinks. © 2002 Elsevier Science (USA).

Identifier

0036353291 (Scopus)

Publication Title

Journal of Colloid and Interface Science

External Full Text Location

https://doi.org/10.1006/jcis.2001.8125

ISSN

00219797

First Page

259

Last Page

265

Issue

2

Volume

247

Recommended Citation

Axe, L. and Trivedi, P., "Intraparticle surface diffusion of metal contaminants and their attenuation in microporous amorphous Al, Fe, and Mn oxides" (2002). Faculty Publications. 14909.
https://digitalcommons.njit.edu/fac_pubs/14909