Influence of carbon and metal oxide nanomaterials on aqueous concentrations of the munition constituents cyclotrimethylenetrinitramine (RDX) and tungsten
There is an increasing likelihood of interactions between nanomaterials and munitions constituents in the environment resulting from the use of nanomaterials as additives to energetic formulations and potential contact in waste streams from production facilities and runoff from training ranges. The...
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| Veröffentlicht in: | Environmental toxicology and chemistry 2014-05, Vol.33 (5), p.1035-1042 |
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| creator | Brame, Jonathon A. Kennedy, Alan J. Lounds, Christopher D. Bednar, Anthony J. Alvarez, Pedro J.J. Scott, Andrea M. Stanley, Jacob K. |
| description | There is an increasing likelihood of interactions between nanomaterials and munitions constituents in the environment resulting from the use of nanomaterials as additives to energetic formulations and potential contact in waste streams from production facilities and runoff from training ranges. The purpose of the present research was to determine the ability of nano‐aluminum oxide (Al2O3) and multiwalled carbon nanotubes (MWCNTs) to adsorb the munitions constituents cyclotrimethylenetrinitramine (RDX) and tungsten (W) from aqueous solution as a first step in determining the long‐term exposure, transport, and bioavailability implications of such interactions. The results indicate significant adsorption of RDX by MWCNTs and of W by nano‐Al2O3 (but not between W and MWCNT or RDX and nano‐Al2O3). Kinetic sorption and desorption investigations indicated that the most sorption occurs nearly instantaneously ( |
| doi_str_mv | 10.1002/etc.2531 |
| format | Article |
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The purpose of the present research was to determine the ability of nano‐aluminum oxide (Al2O3) and multiwalled carbon nanotubes (MWCNTs) to adsorb the munitions constituents cyclotrimethylenetrinitramine (RDX) and tungsten (W) from aqueous solution as a first step in determining the long‐term exposure, transport, and bioavailability implications of such interactions. The results indicate significant adsorption of RDX by MWCNTs and of W by nano‐Al2O3 (but not between W and MWCNT or RDX and nano‐Al2O3). Kinetic sorption and desorption investigations indicated that the most sorption occurs nearly instantaneously (<5 min), with a relatively slower, secondary binding leading to statistically significant but relatively smaller increases in adsorption over 30 d. The RDX sorption that occurred during the initial interaction was irreversible, with long‐term, reversible sorption likely the result of a secondary interaction; as interaction time increased, however, the portion of W irreversibly sorbed onto nano‐Al2O3 also increased. The present study shows that strong interactions between some munitions constituents and nanomaterials following environmental release are likely. Time‐dependent binding has implications for the bioavailability, migration, transport, and fate of munitions constituents in the environment. Environ Toxicol Chem 2014;33:1035–1042. © 2014 SETAC</description><identifier>ISSN: 0730-7268</identifier><identifier>EISSN: 1552-8618</identifier><identifier>DOI: 10.1002/etc.2531</identifier><identifier>PMID: 24464681</identifier><identifier>CODEN: ETOCDK</identifier><language>eng</language><publisher>Pensacola, FL: Blackwell Publishing Ltd</publisher><subject>Adsorption ; Aluminum ; Aluminum Oxide - chemistry ; Applied sciences ; Aqueous chemistry ; Bioavailability ; Biological and physicochemical phenomena ; Carbon ; Desorption ; Environmental fate ; Environmental Pollutants - analysis ; Environmental Pollutants - chemistry ; Environmental release ; Exact sciences and technology ; Explosive Agents - analysis ; Explosive Agents - chemistry ; Metal concentrations ; Metal oxides ; Military ; Munitions constituent ; Nanomaterial ; Nanomaterials ; Nanostructures - chemistry ; Nanotechnology ; Nanotubes ; Nanotubes, Carbon - chemistry ; Natural water pollution ; Pollution ; Sorption ; Triazines - analysis ; Triazines - chemistry ; Tungsten ; Tungsten - analysis ; Tungsten - chemistry ; Waste streams ; Water - chemistry ; Water treatment and pollution</subject><ispartof>Environmental toxicology and chemistry, 2014-05, Vol.33 (5), p.1035-1042</ispartof><rights>2014 SETAC</rights><rights>2015 INIST-CNRS</rights><rights>2014 SETAC.</rights><rights>Copyright Blackwell Publishing Ltd. 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The purpose of the present research was to determine the ability of nano‐aluminum oxide (Al2O3) and multiwalled carbon nanotubes (MWCNTs) to adsorb the munitions constituents cyclotrimethylenetrinitramine (RDX) and tungsten (W) from aqueous solution as a first step in determining the long‐term exposure, transport, and bioavailability implications of such interactions. The results indicate significant adsorption of RDX by MWCNTs and of W by nano‐Al2O3 (but not between W and MWCNT or RDX and nano‐Al2O3). Kinetic sorption and desorption investigations indicated that the most sorption occurs nearly instantaneously (<5 min), with a relatively slower, secondary binding leading to statistically significant but relatively smaller increases in adsorption over 30 d. The RDX sorption that occurred during the initial interaction was irreversible, with long‐term, reversible sorption likely the result of a secondary interaction; as interaction time increased, however, the portion of W irreversibly sorbed onto nano‐Al2O3 also increased. The present study shows that strong interactions between some munitions constituents and nanomaterials following environmental release are likely. Time‐dependent binding has implications for the bioavailability, migration, transport, and fate of munitions constituents in the environment. 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The purpose of the present research was to determine the ability of nano‐aluminum oxide (Al2O3) and multiwalled carbon nanotubes (MWCNTs) to adsorb the munitions constituents cyclotrimethylenetrinitramine (RDX) and tungsten (W) from aqueous solution as a first step in determining the long‐term exposure, transport, and bioavailability implications of such interactions. The results indicate significant adsorption of RDX by MWCNTs and of W by nano‐Al2O3 (but not between W and MWCNT or RDX and nano‐Al2O3). Kinetic sorption and desorption investigations indicated that the most sorption occurs nearly instantaneously (<5 min), with a relatively slower, secondary binding leading to statistically significant but relatively smaller increases in adsorption over 30 d. The RDX sorption that occurred during the initial interaction was irreversible, with long‐term, reversible sorption likely the result of a secondary interaction; as interaction time increased, however, the portion of W irreversibly sorbed onto nano‐Al2O3 also increased. The present study shows that strong interactions between some munitions constituents and nanomaterials following environmental release are likely. Time‐dependent binding has implications for the bioavailability, migration, transport, and fate of munitions constituents in the environment. Environ Toxicol Chem 2014;33:1035–1042. © 2014 SETAC</abstract><cop>Pensacola, FL</cop><pub>Blackwell Publishing Ltd</pub><pmid>24464681</pmid><doi>10.1002/etc.2531</doi><tpages>8</tpages></addata></record> |
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| ispartof | Environmental toxicology and chemistry, 2014-05, Vol.33 (5), p.1035-1042 |
| issn | 0730-7268 1552-8618 |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Adsorption Aluminum Aluminum Oxide - chemistry Applied sciences Aqueous chemistry Bioavailability Biological and physicochemical phenomena Carbon Desorption Environmental fate Environmental Pollutants - analysis Environmental Pollutants - chemistry Environmental release Exact sciences and technology Explosive Agents - analysis Explosive Agents - chemistry Metal concentrations Metal oxides Military Munitions constituent Nanomaterial Nanomaterials Nanostructures - chemistry Nanotechnology Nanotubes Nanotubes, Carbon - chemistry Natural water pollution Pollution Sorption Triazines - analysis Triazines - chemistry Tungsten Tungsten - analysis Tungsten - chemistry Waste streams Water - chemistry Water treatment and pollution |
| title | Influence of carbon and metal oxide nanomaterials on aqueous concentrations of the munition constituents cyclotrimethylenetrinitramine (RDX) and tungsten |
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