Influence of Process Parameters on Chlorinated Biocide Decontamination by li-CO 2 on Artificially Contaminated Model Materials

Lombardo, Tiziana; Wörle, Marie; Hubert, Vera; Hildbrand, Erwin; Hinterleitner, Christina; Mayer, Ingo; von Arx, Urs (2019). Influence of Process Parameters on Chlorinated Biocide Decontamination by li-CO 2 on Artificially Contaminated Model Materials Studies in Conservation, 65(2), pp. 65-76. Taylor & Francis 10.1080/00393630.2019.1641001

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Previously, heavy use of biocides for the treatment of objects made of organic materials in museum collections (e.g. ethnographic, historical collections) was very common. Now suitable decontamination methods/technologies are being sought. A decontamination treatment by li- CO2 was optimized that considered the specific requirements of museum objects. The treatment was tested on model materials artificially contaminated with biocide solutions containing dichlorodiphenyltrichloroethane (DDT), pentachlorophenol (PCP), lindane, and permethrin or cypermethrin. High decontamination was achieved for DDT, lindane, PCP, and permethrin on artificially biocide loaded wool and wood model materials. Optimal process parameter settings for li-CO2 decontamination include a single 30 min cycle for woolen materials and three sequential 30 min cycles each for wood. These methods allow a reduction of at least 90% of all biocides for wool and between 70% and 85% for wood. Decontamination of the latter was more effective for less polar biocides as DDT and permethrin. Despite a significant improvement in decontamination for wood using co-solvents such as acetone, ethanol, and methyl tertiary-butyl ether (MTBE), their use is not recommended due to the increased risk of damage to the objects, in particular if a surface coating is present.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM
Name:	Lombardo, Tiziana; Wörle, Marie; Hubert, Vera; Hildbrand, Erwin; Hinterleitner, Christina; Mayer, Ingo and von Arx, Urs
Subjects:	N Fine Arts > NX Arts in general Q Science > Q Science (General) Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TP Chemical technology
ISSN:	0039-3630
Publisher:	Taylor & Francis
Language:	English
Submitter:	Christelle Ganne-Chédeville
Date Deposited:	21 Nov 2019 08:55
Last Modified:	26 Jan 2020 01:32
Publisher DOI:	10.1080/00393630.2019.1641001
ARBOR DOI:	10.24451/arbor.9049
URI:	https://arbor.bfh.ch/id/eprint/9049