Amidoxime-functionalized bead cellulose for the decomposition of highly toxic organophosphates

0542963 - ÚACH 2022 RIV GB eng J - Journal Article
Janoš, P. - Tokar, O. - Došek, M. - Mazanec, K. - Ryšánek, P. - Kormunda, M. - Henych, Jiří - Janoš, P. jr.
Amidoxime-functionalized bead cellulose for the decomposition of highly toxic organophosphates.
RSC Advances. Roč. 11, č. 29 (2021), s. 17976-17984. E-ISSN 2046-2069
R&D Projects: GA ČR(CZ) GA19-07460S; GA MŠMT(CZ) LM2015073
Institutional support: RVO:61388980
Keywords : Chemical warfare * Degradation * Pesticides * Quantum theory
OECD category: Inorganic and nuclear chemistry
Impact factor: 4.036, year: 2021
Method of publishing: Open access

Regenerated bead cellulose is a promising material with excellent mechanical and rheological properties, ideally suited for advanced environmental applications. By introducing the amidoxime functional group into the glucose unit at the C-6 position, highly effective reactive sorbent was prepared and used to destroy priority hazardous substances such as organophosphate pesticides or nerve-paralytic chemical warfare agents (CWAs). Quantum mechanical (QM) calculations were performed to study the interactions of organophosphates with amidoxime functional groups at the molecular level. It was found that the energetic reaction barrier of the rate-limiting step is markedly reduced (from 31.40 to 11.37 kcal mol-1) in the case of the amidoxime-catalysed degradation of parathion methyl, which resulted in a dramatic increase in the degradation rate, this was fully confirmed by experiments, in which the pesticide degradation proceeded at the time scale of several hours (t1/2 = 20-30 hours at pH 7.22).
Permanent Link: http://hdl.handle.net/11104/0320280