Advanced

Biodegradability and toxicity assessment of trans-chlordane photochemical treatment.

Hey, Gerly LU ; Auresenia, Joseph; Gallardo, Susan and Guieysse, Benoit LU (2008) In Chemosphere 73(9). p.1512-1517
Abstract
The removal of trans-chlordane (C(10)H(6)Cl(8)) from aqueous solutions was studied using UV, UV/H(2)O(2), UV/H(2)O(2)/Fe(2+), UV/TiO(2), or UV/TiO(2)/H(2)O(2) treatment using either UV/Vis blue lamps or UVC lamps (254nm). H(2)O(2), FeSO(4) and TiO(2) were added at 1700, 456, and 2500mgL(-1), respectively. trans-Chlordane was not significantly removed in non-irradiated controls and in samples irradiated with UV/Vis. It was also not removed in the absence of surfactant Triton X-114 added at 250mgL(-1). In the presence of the surfactant, trans-chlordane concentration was reduced by 95-100% after 48h of UVC and UVC/H(2)O(2) treatments and 70-80% after UVC/H(2)O(2)/Fe(2+), UVC/TiO(2) and UVC/H(2)O(2)/TiO(2) treatments. Based on these results,... (More)
The removal of trans-chlordane (C(10)H(6)Cl(8)) from aqueous solutions was studied using UV, UV/H(2)O(2), UV/H(2)O(2)/Fe(2+), UV/TiO(2), or UV/TiO(2)/H(2)O(2) treatment using either UV/Vis blue lamps or UVC lamps (254nm). H(2)O(2), FeSO(4) and TiO(2) were added at 1700, 456, and 2500mgL(-1), respectively. trans-Chlordane was not significantly removed in non-irradiated controls and in samples irradiated with UV/Vis. It was also not removed in the absence of surfactant Triton X-114 added at 250mgL(-1). In the presence of the surfactant, trans-chlordane concentration was reduced by 95-100% after 48h of UVC and UVC/H(2)O(2) treatments and 70-80% after UVC/H(2)O(2)/Fe(2+), UVC/TiO(2) and UVC/H(2)O(2)/TiO(2) treatments. Based on these results, UVC, UVC/H(2)O(2) and UVC/TiO(2) treatments were further investigated. UVC treatment supported the highest pollutant removal (100% in 48h), dechlorination efficiency (81% in 48h), and detoxification to Lepidium sativum seed germination and activated sludge respiration although irradiated samples remained toxic to Chlorella vulgaris. Biodegradation of the UVC irradiated samples removed the source of algae toxicity but this could not be clearly attributed to the removal of trans-chlordane photoproducts because the surfactant interfered with the chemical and biological assays. Evidence was found that trans-chlordane was photodegraded through photolysis causing its successive dechlorination. trans-Chlordane removal was well described by a first order kinetic model at a rate of 0.21+/-0.01h(-1) at the 95% confidence interval. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemosphere
volume
73
issue
9
pages
1512 - 1517
publisher
Elsevier
external identifiers
  • wos:000261249300021
  • pmid:18768201
ISSN
1879-1298
DOI
10.1016/j.chemosphere.2008.07.035
language
English
LU publication?
yes
id
62b6a3f7-c361-41ce-bc37-492a7b129b52 (old id 1243452)
date added to LUP
2009-03-09 12:22:19
date last changed
2016-04-15 20:16:07
@article{62b6a3f7-c361-41ce-bc37-492a7b129b52,
  abstract     = {The removal of trans-chlordane (C(10)H(6)Cl(8)) from aqueous solutions was studied using UV, UV/H(2)O(2), UV/H(2)O(2)/Fe(2+), UV/TiO(2), or UV/TiO(2)/H(2)O(2) treatment using either UV/Vis blue lamps or UVC lamps (254nm). H(2)O(2), FeSO(4) and TiO(2) were added at 1700, 456, and 2500mgL(-1), respectively. trans-Chlordane was not significantly removed in non-irradiated controls and in samples irradiated with UV/Vis. It was also not removed in the absence of surfactant Triton X-114 added at 250mgL(-1). In the presence of the surfactant, trans-chlordane concentration was reduced by 95-100% after 48h of UVC and UVC/H(2)O(2) treatments and 70-80% after UVC/H(2)O(2)/Fe(2+), UVC/TiO(2) and UVC/H(2)O(2)/TiO(2) treatments. Based on these results, UVC, UVC/H(2)O(2) and UVC/TiO(2) treatments were further investigated. UVC treatment supported the highest pollutant removal (100% in 48h), dechlorination efficiency (81% in 48h), and detoxification to Lepidium sativum seed germination and activated sludge respiration although irradiated samples remained toxic to Chlorella vulgaris. Biodegradation of the UVC irradiated samples removed the source of algae toxicity but this could not be clearly attributed to the removal of trans-chlordane photoproducts because the surfactant interfered with the chemical and biological assays. Evidence was found that trans-chlordane was photodegraded through photolysis causing its successive dechlorination. trans-Chlordane removal was well described by a first order kinetic model at a rate of 0.21+/-0.01h(-1) at the 95% confidence interval.},
  author       = {Hey, Gerly and Auresenia, Joseph and Gallardo, Susan and Guieysse, Benoit},
  issn         = {1879-1298},
  language     = {eng},
  number       = {9},
  pages        = {1512--1517},
  publisher    = {Elsevier},
  series       = {Chemosphere},
  title        = {Biodegradability and toxicity assessment of trans-chlordane photochemical treatment.},
  url          = {http://dx.doi.org/10.1016/j.chemosphere.2008.07.035},
  volume       = {73},
  year         = {2008},
}