Aqueous chlorination of algal odorants

Reaction kinetics and formation of disinfection by-products

Ke Jia Zhang, Nai Yun Gao, Yang Deng, Tuqiao Zhang, Cong Li

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

Bench-scale kinetics tests were conducted to evaluate the formation of disinfection by-products (DBPs), as well as the odorant degradation, during chlorination of representative algal odorants. β-Cyclocitral degradation better followed a pseudo first order kinetics pattern, while the decomposition behaviors of β-ionone and heptanal were better described by the pseudo second order kinetics. Trihalomethanes (THMs) were commonly found during chlorination of β-cyclocitral, β-ionone and heptanal, but dimethylsulfide and dimethyl trisulfide did not contribute to the THM formation. In contrast, haloacetic acids (HAAs) were undetectable in all the samples. During chlorination of β-cyclocitral, β-ionone and heptanal, primary intermediate oxidation products were identified. Particularly, β-ionone was a significant THM precursor. Typically, the formation of chloroform was favored with the increasing pH from 2 to 12. In the tests to chlorinate raw water collected from the Taihu Lake, China, odorants in Microcystis aeruginosa could contribute to the chloroform formation. β-Cyclocitral and β-ionone, accounting for 0.021% μg/μg DOC and 0.0027% μg/μg DOC of intracellular organic matter (IOM), produced 0. 98% and 0.78% chloroform of IOM formed, respectively. This study demonstrated that algal odorants played a critical role in the DBP formation during chlorination in water treatment.

Original languageEnglish
Pages (from-to)93-99
Number of pages7
JournalSeparation and Purification Technology
Volume92
DOIs
StatePublished - 18 May 2012

Fingerprint

Norisoprenoids
Disinfection
Chlorination
Reaction kinetics
Trihalomethanes
Byproducts
Chlorine compounds
Chloroform
Biological materials
Kinetics
Degradation
Water treatment
Lakes
Decomposition
Oxidation
Acids
Water
heptanal

Keywords

  • β-Cyclocitral
  • Algal odorants
  • Chloroform
  • DBPs
  • Microcystis aeruginosa

Cite this

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title = "Aqueous chlorination of algal odorants: Reaction kinetics and formation of disinfection by-products",
abstract = "Bench-scale kinetics tests were conducted to evaluate the formation of disinfection by-products (DBPs), as well as the odorant degradation, during chlorination of representative algal odorants. β-Cyclocitral degradation better followed a pseudo first order kinetics pattern, while the decomposition behaviors of β-ionone and heptanal were better described by the pseudo second order kinetics. Trihalomethanes (THMs) were commonly found during chlorination of β-cyclocitral, β-ionone and heptanal, but dimethylsulfide and dimethyl trisulfide did not contribute to the THM formation. In contrast, haloacetic acids (HAAs) were undetectable in all the samples. During chlorination of β-cyclocitral, β-ionone and heptanal, primary intermediate oxidation products were identified. Particularly, β-ionone was a significant THM precursor. Typically, the formation of chloroform was favored with the increasing pH from 2 to 12. In the tests to chlorinate raw water collected from the Taihu Lake, China, odorants in Microcystis aeruginosa could contribute to the chloroform formation. β-Cyclocitral and β-ionone, accounting for 0.021{\%} μg/μg DOC and 0.0027{\%} μg/μg DOC of intracellular organic matter (IOM), produced 0. 98{\%} and 0.78{\%} chloroform of IOM formed, respectively. This study demonstrated that algal odorants played a critical role in the DBP formation during chlorination in water treatment.",
keywords = "β-Cyclocitral, Algal odorants, Chloroform, DBPs, Microcystis aeruginosa",
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Aqueous chlorination of algal odorants : Reaction kinetics and formation of disinfection by-products. / Zhang, Ke Jia; Gao, Nai Yun; Deng, Yang; Zhang, Tuqiao; Li, Cong.

In: Separation and Purification Technology, Vol. 92, 18.05.2012, p. 93-99.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Aqueous chlorination of algal odorants

T2 - Reaction kinetics and formation of disinfection by-products

AU - Zhang, Ke Jia

AU - Gao, Nai Yun

AU - Deng, Yang

AU - Zhang, Tuqiao

AU - Li, Cong

PY - 2012/5/18

Y1 - 2012/5/18

N2 - Bench-scale kinetics tests were conducted to evaluate the formation of disinfection by-products (DBPs), as well as the odorant degradation, during chlorination of representative algal odorants. β-Cyclocitral degradation better followed a pseudo first order kinetics pattern, while the decomposition behaviors of β-ionone and heptanal were better described by the pseudo second order kinetics. Trihalomethanes (THMs) were commonly found during chlorination of β-cyclocitral, β-ionone and heptanal, but dimethylsulfide and dimethyl trisulfide did not contribute to the THM formation. In contrast, haloacetic acids (HAAs) were undetectable in all the samples. During chlorination of β-cyclocitral, β-ionone and heptanal, primary intermediate oxidation products were identified. Particularly, β-ionone was a significant THM precursor. Typically, the formation of chloroform was favored with the increasing pH from 2 to 12. In the tests to chlorinate raw water collected from the Taihu Lake, China, odorants in Microcystis aeruginosa could contribute to the chloroform formation. β-Cyclocitral and β-ionone, accounting for 0.021% μg/μg DOC and 0.0027% μg/μg DOC of intracellular organic matter (IOM), produced 0. 98% and 0.78% chloroform of IOM formed, respectively. This study demonstrated that algal odorants played a critical role in the DBP formation during chlorination in water treatment.

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