Documents disponibles écrits par cet auteur

All-weather hydrogen peroxide-based decontamination of CBRN contaminants / George W. Wagner in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3099–3105 Titre : All-weather hydrogen peroxide-based decontamination of CBRN contaminants Type de document : texte imprimé Auteurs : George W. Wagner, Auteur ; Lawrence R. Procell, Auteur ; David C. Sorrick, Auteur Année de publication : 2010 Article en page(s) : pp. 3099–3105 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : hydrogen  peroxide  decontamination  All-weather  CBRN  contaminants Résumé : A hydrogen peroxide-based decontaminant, Decon Green, is efficacious for the decontamination of chemical agents VX (S-2-(diisopropylamino)ethyl O-ethyl methylphosphonothioate), GD (Soman, pinacolyl methylphosphonofluoridate), and HD (mustard, bis(2-chloroethyl) sulfide); the biological agent anthrax (Bacillus anthracis); and radiological isotopes 137Cs and 60Co; thus demonstrating the ability of this decontamination approach to ameliorate the aftermath of all three types of weapons of mass destruction (WMD). Reaction mechanisms afforded for the chemical agents are discussed as are rationales for the enhanced removal efficacy of recalcitrant 60Co on certain surfaces. Decontaminants of this nature can be deployed, and are effective, at very low temperatures (−32 °C), as shown for studies done with VX and HD simulants, without the need for external heat sources. Finally, the efficacy of a lower-logistics, dry decontaminant powder concentrate (utilizing the solid active-oxygen compounds peracetyl borate and Peroxydone) which can be reconstituted with water in the field prior to use, is presented. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019177 [article] All-weather hydrogen peroxide-based decontamination of CBRN contaminants [texte imprimé] / George W. Wagner, Auteur ; Lawrence R. Procell, Auteur ; David C. Sorrick, Auteur . - 2010 . - pp. 3099–3105. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3099–3105 Mots-clés : hydrogen  peroxide  decontamination  All-weather  CBRN  contaminants Résumé : A hydrogen peroxide-based decontaminant, Decon Green, is efficacious for the decontamination of chemical agents VX (S-2-(diisopropylamino)ethyl O-ethyl methylphosphonothioate), GD (Soman, pinacolyl methylphosphonofluoridate), and HD (mustard, bis(2-chloroethyl) sulfide); the biological agent anthrax (Bacillus anthracis); and radiological isotopes 137Cs and 60Co; thus demonstrating the ability of this decontamination approach to ameliorate the aftermath of all three types of weapons of mass destruction (WMD). Reaction mechanisms afforded for the chemical agents are discussed as are rationales for the enhanced removal efficacy of recalcitrant 60Co on certain surfaces. Decontaminants of this nature can be deployed, and are effective, at very low temperatures (−32 °C), as shown for studies done with VX and HD simulants, without the need for external heat sources. Finally, the efficacy of a lower-logistics, dry decontaminant powder concentrate (utilizing the solid active-oxygen compounds peracetyl borate and Peroxydone) which can be reconstituted with water in the field prior to use, is presented. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019177

Effect of adsorbed water and surface hydroxyls on the hydrolysis of VX, GD, and HD on titania materials / George W. Wagner in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3598–3603 Titre : Effect of adsorbed water and surface hydroxyls on the hydrolysis of VX, GD, and HD on titania materials : The development of self - decontaminating paints Type de document : texte imprimé Auteurs : George W. Wagner, Auteur ; Gregory W. Peterson, Auteur ; John J. Mahle, Auteur Année de publication : 2012 Article en page(s) : pp. 3598–3603 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorbed  water  Hydrolysis Résumé : Titania materials such as anatase (TiO2), nanotubular titania (NTT), and nanocrystalline titania (nTiO2) exhibit extremely short half-lives for VX, provided adequate surface-adsorbed water is present. The effect of coadsorbed water on the hydrolytic activity of these materials toward VX, GD, and HD was assessed to select the most promising candidate for study in self-decontaminating paints and coatings. The best candidate is nTiO2, primarily chosen for its extremely short VX half-life at quite high water-content. For the most part, imbedding nTiO2 into various coatings negatively impacts its reactivity. A notable exception is observed for the case of HD and nTiO2/Wax (a paint simulant), where a somewhat shorter half-life is observed compared to the nascent nTiO2 powder. However, encrusting a painted surface with nTiO2 powder, leaving it partly exposed rather than wholly imbedded, results in improved reactivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202063p [article] Effect of adsorbed water and surface hydroxyls on the hydrolysis of VX, GD, and HD on titania materials : The development of self - decontaminating paints [texte imprimé] / George W. Wagner, Auteur ; Gregory W. Peterson, Auteur ; John J. Mahle, Auteur . - 2012 . - pp. 3598–3603. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3598–3603 Mots-clés : Adsorbed  water  Hydrolysis Résumé : Titania materials such as anatase (TiO2), nanotubular titania (NTT), and nanocrystalline titania (nTiO2) exhibit extremely short half-lives for VX, provided adequate surface-adsorbed water is present. The effect of coadsorbed water on the hydrolytic activity of these materials toward VX, GD, and HD was assessed to select the most promising candidate for study in self-decontaminating paints and coatings. The best candidate is nTiO2, primarily chosen for its extremely short VX half-life at quite high water-content. For the most part, imbedding nTiO2 into various coatings negatively impacts its reactivity. A notable exception is observed for the case of HD and nTiO2/Wax (a paint simulant), where a somewhat shorter half-life is observed compared to the nascent nTiO2 powder. However, encrusting a painted surface with nTiO2 powder, leaving it partly exposed rather than wholly imbedded, results in improved reactivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202063p

Enhanced cyanogen chloride removal by the reactive zirconium hydroxide substrate / Gregory W. Peterson in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11182–11187 Titre : Enhanced cyanogen chloride removal by the reactive zirconium hydroxide substrate Type de document : texte imprimé Auteurs : Gregory W. Peterson, Auteur ; George W. Wagner, Auteur ; Jennifer H. Keller, Auteur Année de publication : 2011 Article en page(s) : pp. 11182–11187 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microporous  Zirconium  Hydroxide Résumé : A novel microporous sorbent consisting of zirconium hydroxide impregnated with triethylenediamine (TEDA) was evaluated for the removal of cyanogen chloride. Breakthrough data were collected on packed beds, illustrating the efficacious nature of TEDA and the enhanced cyanogen chloride removal from the basic zirconium hydroxide structure. NMR and XPS analyses revealed the fate of cyanogen chloride, with inorganic chloride byproducts deposited on the surface of the material and polymerized urea condensates physically adsorbed in the pore structure. The zirconium hydroxide media were found to provide significantly enhanced removal capabilities as compared to traditionally impregnated activated carbons, allowing for the development of respirators with reduced encumbrance. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101204e [article] Enhanced cyanogen chloride removal by the reactive zirconium hydroxide substrate [texte imprimé] / Gregory W. Peterson, Auteur ; George W. Wagner, Auteur ; Jennifer H. Keller, Auteur . - 2011 . - pp. 11182–11187. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11182–11187 Mots-clés : Microporous  Zirconium  Hydroxide Résumé : A novel microporous sorbent consisting of zirconium hydroxide impregnated with triethylenediamine (TEDA) was evaluated for the removal of cyanogen chloride. Breakthrough data were collected on packed beds, illustrating the efficacious nature of TEDA and the enhanced cyanogen chloride removal from the basic zirconium hydroxide structure. NMR and XPS analyses revealed the fate of cyanogen chloride, with inorganic chloride byproducts deposited on the surface of the material and polymerized urea condensates physically adsorbed in the pore structure. The zirconium hydroxide media were found to provide significantly enhanced removal capabilities as compared to traditionally impregnated activated carbons, allowing for the development of respirators with reduced encumbrance. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101204e

Mitigation of VX effluents in thorough decontamination operations / George W. Wagner in Industrial & engineering chemistry research, Vol. 51 N° 49 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 49 (Décembre 2012) . - pp. 16146-16150 Titre : Mitigation of VX effluents in thorough decontamination operations Type de document : texte imprimé Auteurs : George W. Wagner, Auteur ; Roberta Xega, Auteur Année de publication : 2013 Article en page(s) : pp. 16146-16150 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Decontamination  Pollution  abatement Résumé : Effluents resulting from the decontamination of VX from CARC-painted panels using DF200 have been studied to determine the presence of toxic species. The effect of concrete and sand (two possible sump materials) on the effluents is also examined. Wash-effluents, generated by washing the panel with hot soapy water prior to decontamination, contain high levels of VX which slowly hydrolyze to nontoxic EMPTA, EMPA, and toxic EA-2192, with concrete tending to minimize formation of the latter. Rinse-effluents, generated following decontamination, contain lower levels of VX which tend to fall below acceptable levels (20 ppb) within several hours in contact with sand. VX in rinse-effluents in contact with concrete persists for up to a week, consistent with the decomposition by concrete of active H2O2 in any residual DF200. EA-2192 persists for at least a week in rinse—effluents—in contact with either sand or concrete. Lining sump pits with HTH is a possible mitigation strategy as this decontaminant readily oxidizes residual VX, EA-2192, and even EMPTA to nontoxic EMPA and MPA. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732139 [article] Mitigation of VX effluents in thorough decontamination operations [texte imprimé] / George W. Wagner, Auteur ; Roberta Xega, Auteur . - 2013 . - pp. 16146-16150. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 49 (Décembre 2012) . - pp. 16146-16150 Mots-clés : Decontamination  Pollution  abatement Résumé : Effluents resulting from the decontamination of VX from CARC-painted panels using DF200 have been studied to determine the presence of toxic species. The effect of concrete and sand (two possible sump materials) on the effluents is also examined. Wash-effluents, generated by washing the panel with hot soapy water prior to decontamination, contain high levels of VX which slowly hydrolyze to nontoxic EMPTA, EMPA, and toxic EA-2192, with concrete tending to minimize formation of the latter. Rinse-effluents, generated following decontamination, contain lower levels of VX which tend to fall below acceptable levels (20 ppb) within several hours in contact with sand. VX in rinse-effluents in contact with concrete persists for up to a week, consistent with the decomposition by concrete of active H2O2 in any residual DF200. EA-2192 persists for at least a week in rinse—effluents—in contact with either sand or concrete. Lining sump pits with HTH is a possible mitigation strategy as this decontaminant readily oxidizes residual VX, EA-2192, and even EMPTA to nontoxic EMPA and MPA. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732139