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Degradation of the microbicide 2-(thiocyanomethylthio) benzothiazole by direct photolysis

Bertoldi, Crislaine LU orcid ; Fernandes, Andreia and Gutterres, Mariliz (2017) 34th International Union of Leather Technologists and Chemist Societies Congress, IULTCS 2017 In Proceedings of the 34th IULTCS Congress: Science and Technology for Sustainability of Leather p.156-165
Abstract

Microbicides in the leather industries are employed to avoid the biodeterioration of the hides by microorganisms. This problem may lead to harmful characteristics to the end product such as stains, roughness and decrease mechanical properties of leather. Therefore, microbicides like the 2-(thiocyanomethylthio) benzothiazole (TMCTB) are applied in distinct steps of the tanning process as alternative to the chlorinated phenols compounds. The microbicides have low mineralization through usual treatments in the leather industries effluents, furthermore it prejudices efficiency of biological treatment if present in high concentration. Thus, the main purpose of this research is to degrade TCMTB by direct photolysis and monitor the degradation... (More)

Microbicides in the leather industries are employed to avoid the biodeterioration of the hides by microorganisms. This problem may lead to harmful characteristics to the end product such as stains, roughness and decrease mechanical properties of leather. Therefore, microbicides like the 2-(thiocyanomethylthio) benzothiazole (TMCTB) are applied in distinct steps of the tanning process as alternative to the chlorinated phenols compounds. The microbicides have low mineralization through usual treatments in the leather industries effluents, furthermore it prejudices efficiency of biological treatment if present in high concentration. Thus, the main purpose of this research is to degrade TCMTB by direct photolysis and monitor the degradation by high performance liquid phase chromatography (HPLC) in TCMTB standards solutions. Photolysis tests were performed with a reactor equipped with 250 W mercury lamp. For the experiments were used standards solutions of 20, 40, 60 and 80 mg L-1 TCMTB concentration. The photolysis tests were performed during 7 h and the degradation was monitored through sampling collection at predetermined periods of time. The monitoring of the TCMTB degradation by HPLC analysis has proved to be appropriate, since it was possible to note that all samples showed total degradation of the microbicide in the first 30 min of the photolysis treatment. Also, it was noted the formation of photoproducts along the photolysis tests, which were reduced to low concentrations after 6 h of treatment.

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Please use this url to cite or link to this publication:
author
; and
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
keywords
Degradation, High performance liquid chromatography, Photolysis, TCMTB
host publication
Proceedings of the 34th IULTCS Congress : Science and Technology for Sustainability of Leather - Science and Technology for Sustainability of Leather
series title
Proceedings of the 34th IULTCS Congress: Science and Technology for Sustainability of Leather
pages
10 pages
publisher
CSIR-CLRI
conference name
34th International Union of Leather Technologists and Chemist Societies Congress, IULTCS 2017
conference location
Chennai, India
conference dates
2017-02-05 - 2017-02-08
external identifiers
  • scopus:85041312693
ISBN
9788193263907
language
English
LU publication?
no
id
28d95df9-c106-40f4-97cc-a947d96d5ab7
date added to LUP
2024-07-02 09:14:25
date last changed
2024-07-03 13:54:30
@inproceedings{28d95df9-c106-40f4-97cc-a947d96d5ab7,
  abstract     = {{<p>Microbicides in the leather industries are employed to avoid the biodeterioration of the hides by microorganisms. This problem may lead to harmful characteristics to the end product such as stains, roughness and decrease mechanical properties of leather. Therefore, microbicides like the 2-(thiocyanomethylthio) benzothiazole (TMCTB) are applied in distinct steps of the tanning process as alternative to the chlorinated phenols compounds. The microbicides have low mineralization through usual treatments in the leather industries effluents, furthermore it prejudices efficiency of biological treatment if present in high concentration. Thus, the main purpose of this research is to degrade TCMTB by direct photolysis and monitor the degradation by high performance liquid phase chromatography (HPLC) in TCMTB standards solutions. Photolysis tests were performed with a reactor equipped with 250 W mercury lamp. For the experiments were used standards solutions of 20, 40, 60 and 80 mg L-1 TCMTB concentration. The photolysis tests were performed during 7 h and the degradation was monitored through sampling collection at predetermined periods of time. The monitoring of the TCMTB degradation by HPLC analysis has proved to be appropriate, since it was possible to note that all samples showed total degradation of the microbicide in the first 30 min of the photolysis treatment. Also, it was noted the formation of photoproducts along the photolysis tests, which were reduced to low concentrations after 6 h of treatment.</p>}},
  author       = {{Bertoldi, Crislaine and Fernandes, Andreia and Gutterres, Mariliz}},
  booktitle    = {{Proceedings of the 34th IULTCS Congress : Science and Technology for Sustainability of Leather}},
  isbn         = {{9788193263907}},
  keywords     = {{Degradation; High performance liquid chromatography; Photolysis; TCMTB}},
  language     = {{eng}},
  pages        = {{156--165}},
  publisher    = {{CSIR-CLRI}},
  series       = {{Proceedings of the 34th IULTCS Congress: Science and Technology for Sustainability of Leather}},
  title        = {{Degradation of the microbicide 2-(thiocyanomethylthio) benzothiazole by direct photolysis}},
  year         = {{2017}},
}