Influence of hydroxypropyl-β-cyclodextrin (HPCD) on the bioavailability and biodegradation of pyrene

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

It is well known that the limited aqueous solubilities of polycyclic aromatic hydrocarbons (PAH) often reduce their bioavailability to bacterial populations. The objective of this study was to test the impact of a solubility-enhancement reagent, hydroxypropyl-β-cyclodextrin (HPCD), on the bioavailability and biodegradation of pyrene. No measurable loss of pyrene occurred for the control vials throughout the first 22 weeks of the experiment, indicating the absence of mass loss via abiotic transformation and volatilization. The vials containing pyrene and the degrader isolate (Burkholderia CRE 7), but no HPCD, also exhibited no measurable loss of pyrene throughout the experiment. Conversely, biodegradation of pyrene appears to have been initiated after approximately 15 weeks for the vials containing 10 4 mg l-1 HPCD. By the end of the experiment, approximately 14% (w/w) of the pyrene was biodegraded in the presence of HPCD. These results indicate that HPCD may be useful for enhancing the bioavailability and biodegradation of pyrene and other PAHs.

Original languageEnglish (US)
Pages (from-to)725-728
Number of pages4
JournalChemosphere
Volume60
Issue number5
DOIs
StatePublished - Jul 2005

Fingerprint

Cyclodextrins
Pyrene
Biodegradation
pyrene
Biological Availability
bioavailability
biodegradation
Polycyclic aromatic hydrocarbons
Solubility
PAH
solubility
Burkholderia
Volatilization
experiment
Experiments
Polycyclic Aromatic Hydrocarbons
volatilization
Vaporization
Population
loss

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Influence of hydroxypropyl-β-cyclodextrin (HPCD) on the bioavailability and biodegradation of pyrene. / Wang, Jiann Ming; Maier, Raina Margaret; Brusseau, Mark L.

In: Chemosphere, Vol. 60, No. 5, 07.2005, p. 725-728.

Research output: Contribution to journalArticle

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AB - It is well known that the limited aqueous solubilities of polycyclic aromatic hydrocarbons (PAH) often reduce their bioavailability to bacterial populations. The objective of this study was to test the impact of a solubility-enhancement reagent, hydroxypropyl-β-cyclodextrin (HPCD), on the bioavailability and biodegradation of pyrene. No measurable loss of pyrene occurred for the control vials throughout the first 22 weeks of the experiment, indicating the absence of mass loss via abiotic transformation and volatilization. The vials containing pyrene and the degrader isolate (Burkholderia CRE 7), but no HPCD, also exhibited no measurable loss of pyrene throughout the experiment. Conversely, biodegradation of pyrene appears to have been initiated after approximately 15 weeks for the vials containing 10 4 mg l-1 HPCD. By the end of the experiment, approximately 14% (w/w) of the pyrene was biodegraded in the presence of HPCD. These results indicate that HPCD may be useful for enhancing the bioavailability and biodegradation of pyrene and other PAHs.

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