Understanding acoustic cavitation for sonolytic degradation of p-cresol as a model contaminant

Rajesh Balachandran, Zach Patterson, Pierre A Deymier, Shane A Snyder, Manish K Keswani

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Many modern techniques exist for the degradation of organic pollutants in water. Numerous treatment processes which utilize the formation of hydroxyl radicals for oxidation of pollutants have been studied thoroughly. In this study, a three pronged approach has been used to characterize and understand the effect of two distinct acoustic frequencies (37 kHz and 1 MHz) on cavitation behavior. Correlation of this behavior with sonolysis of a target phenol pollutant is described. Hydroxyl radical capture, hydrophone, and microelectrode studies in this work show that megasonic frequencies are more effective for generation of hydroxyl radicals and stable cavitation events than ultrasonic frequencies. UV absorption and fluorescence measurements confirm that the combination of ultrasonic sonolysis with a Fenton reagent achieved complete degradation of p-cresol at 50 mg/L in about 30 min. Cost estimates have been made for different sonication processes and compared with traditional advanced oxidation processes.

Original languageEnglish (US)
Pages (from-to)52-59
Number of pages8
JournalChemosphere
Volume147
DOIs
StatePublished - Mar 1 2016

Fingerprint

cavitation
hydroxyl radical
Cavitation
Acoustics
Hydroxyl Radical
acoustics
Ultrasonics
Impurities
Degradation
Hydrophones
Oxidation
degradation
Sonication
pollutant
Organic pollutants
Microelectrodes
Water Pollutants
Phenols
oxidation
hydrophone

Keywords

  • Acoustic cavitation
  • Fenton's reagent
  • Hydroxyl radicals
  • P-cresol
  • Sonolysis

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

Cite this

Understanding acoustic cavitation for sonolytic degradation of p-cresol as a model contaminant. / Balachandran, Rajesh; Patterson, Zach; Deymier, Pierre A; Snyder, Shane A; Keswani, Manish K.

In: Chemosphere, Vol. 147, 01.03.2016, p. 52-59.

Research output: Contribution to journalArticle

@article{cda329f4539b43bea637d55f4d9a6920,
title = "Understanding acoustic cavitation for sonolytic degradation of p-cresol as a model contaminant",
abstract = "Many modern techniques exist for the degradation of organic pollutants in water. Numerous treatment processes which utilize the formation of hydroxyl radicals for oxidation of pollutants have been studied thoroughly. In this study, a three pronged approach has been used to characterize and understand the effect of two distinct acoustic frequencies (37 kHz and 1 MHz) on cavitation behavior. Correlation of this behavior with sonolysis of a target phenol pollutant is described. Hydroxyl radical capture, hydrophone, and microelectrode studies in this work show that megasonic frequencies are more effective for generation of hydroxyl radicals and stable cavitation events than ultrasonic frequencies. UV absorption and fluorescence measurements confirm that the combination of ultrasonic sonolysis with a Fenton reagent achieved complete degradation of p-cresol at 50 mg/L in about 30 min. Cost estimates have been made for different sonication processes and compared with traditional advanced oxidation processes.",
keywords = "Acoustic cavitation, Fenton's reagent, Hydroxyl radicals, P-cresol, Sonolysis",
author = "Rajesh Balachandran and Zach Patterson and Deymier, {Pierre A} and Snyder, {Shane A} and Keswani, {Manish K}",
year = "2016",
month = "3",
day = "1",
doi = "10.1016/j.chemosphere.2015.12.066",
language = "English (US)",
volume = "147",
pages = "52--59",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Understanding acoustic cavitation for sonolytic degradation of p-cresol as a model contaminant

AU - Balachandran, Rajesh

AU - Patterson, Zach

AU - Deymier, Pierre A

AU - Snyder, Shane A

AU - Keswani, Manish K

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Many modern techniques exist for the degradation of organic pollutants in water. Numerous treatment processes which utilize the formation of hydroxyl radicals for oxidation of pollutants have been studied thoroughly. In this study, a three pronged approach has been used to characterize and understand the effect of two distinct acoustic frequencies (37 kHz and 1 MHz) on cavitation behavior. Correlation of this behavior with sonolysis of a target phenol pollutant is described. Hydroxyl radical capture, hydrophone, and microelectrode studies in this work show that megasonic frequencies are more effective for generation of hydroxyl radicals and stable cavitation events than ultrasonic frequencies. UV absorption and fluorescence measurements confirm that the combination of ultrasonic sonolysis with a Fenton reagent achieved complete degradation of p-cresol at 50 mg/L in about 30 min. Cost estimates have been made for different sonication processes and compared with traditional advanced oxidation processes.

AB - Many modern techniques exist for the degradation of organic pollutants in water. Numerous treatment processes which utilize the formation of hydroxyl radicals for oxidation of pollutants have been studied thoroughly. In this study, a three pronged approach has been used to characterize and understand the effect of two distinct acoustic frequencies (37 kHz and 1 MHz) on cavitation behavior. Correlation of this behavior with sonolysis of a target phenol pollutant is described. Hydroxyl radical capture, hydrophone, and microelectrode studies in this work show that megasonic frequencies are more effective for generation of hydroxyl radicals and stable cavitation events than ultrasonic frequencies. UV absorption and fluorescence measurements confirm that the combination of ultrasonic sonolysis with a Fenton reagent achieved complete degradation of p-cresol at 50 mg/L in about 30 min. Cost estimates have been made for different sonication processes and compared with traditional advanced oxidation processes.

KW - Acoustic cavitation

KW - Fenton's reagent

KW - Hydroxyl radicals

KW - P-cresol

KW - Sonolysis

UR - http://www.scopus.com/inward/record.url?scp=84957810362&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957810362&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2015.12.066

DO - 10.1016/j.chemosphere.2015.12.066

M3 - Article

C2 - 26761597

AN - SCOPUS:84957810362

VL - 147

SP - 52

EP - 59

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -