Title

Ultrasound Pretreatment Of Elemental Iron: Kinetic Studies Of Dehalogenation Reaction Enhancement And Surface Effects

Keywords

Groundwater remediation; Iron; Trichloroethylene; Ultrasound

Abstract

This work presents data showing the kinetic improvement afforded by ultrasound pretreatment and illustrates the physical and chemical changes that take place at the iron surface. First-order rate constants improved as much as 78% with 2h of ultrasound pretreatment. Scanning electron microscopy (SEM) and surface area analysis were used for confirmation of the physical changes that take place after ultrasound was used on iron surfaces exposed to a variety of conditions. X-ray photoelectron spectroscopy was used to determine chemical surface characteristics before and after ultrasound use. SEM and surface area analysis showed that ultrasound use clears the iron surface of debris increasing the surface area up to 169%. In addition, exposure to ultrasound alters ratios of surface species, such as adventitious carbon to carbonyl carbon and iron to oxygen, and removed hydroxides thus making the iron more reactive to reductive dehalogenation. Copyright © 2002 Elsevier Science Ltd.

Publication Date

1-1-2002

Publication Title

Water Research

Volume

36

Issue

5

Number of Pages

1342-1350

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/S0043-1354(01)00319-0

Socpus ID

0036181588 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0036181588

This document is currently not available here.

Share

COinS