• 제목/요약/키워드: chemical warfare agent

검색결과 35건 처리시간 0.024초

생체 피부조직을 이용한 피부보호제 in-vitro 시험평가 (In-vitro Tests of Topical Skin Protectants using a Flow-Through Diffusion Cell System Containing Excised Hairless Mouse Skin)

  • 이은영;최후균;김상웅;서동성;조혜은;유치호;김창환;조영
    • 한국군사과학기술학회지
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    • 제25권4호
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    • pp.434-442
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    • 2022
  • Highly toxic chemical warfare agents(CWA) could be used in chemical warfare and terrorism. The protection of skin is crucial for civilians and soldiers, because the primary routes of exposure to CWA are inhalation and skin absorption. Thus, topical skin protectants(TSP) have been studied and developed in many countries to complement protective equipments. In this study, in-vitro test procedure was optimized and established using a flow-through diffusion cell system containing excised hairless mouse skin in an attempt to assess the effectiveness of various TSP formulations against nerve agent simulants. In addition, the test results on the formulations including the ingredients used in SERPACWA(Skin Exposure Reduction Paste Against Chemical Warfare Agent) and IB-1(TSP of Israel) were included, indicating that the formulations with perfluorinated compounds were more effective than the glycerin-based formulations.

화학작용제의 2단계 폐기기술(I) (작용제 가수분해 후 액중배기식 소각처리) (Chemical Agent Disposal Technology by a 2-step Process(I) (Agent Hydrolysis followed by Incineration))

  • 이종철;이용한;오석종;홍대식
    • 한국군사과학기술학회지
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    • 제10권1호
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    • pp.116-122
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    • 2007
  • A 2-step process for the safe disposal of chemical warfare agents(agent hydrolysis followed by incineration In the submerged-quench incinerator) was studied to obtain basic data for the design of pilot plant in the future. Sample materials used for the hydrolysis reaction were sarin(GB), sulfur mustard (HD), and methylphosphonic difluoride(DF). The hydrolysates of these materials were thermally destroyed in a submerged-quench incineration system. Experimental conditions for achieving destruction efficiency of 99.99% in both steps were established and phosphoric acid was recovered from the waste water when destroying DF hydrolysate in the incinerator. Treated water could be reused as process water for the agent hydrolysis.

Compact, Wavelength-selectable, Energy-ratio Variable Nd:YAG Laser at Mid-ultraviolet for Chemical Warfare Agent Detection

  • Kim, Jae-Ihn;Cho, Ki Ho;Lee, Jae-Hwan;Ha, Yeon-Chul
    • Current Optics and Photonics
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    • 제3권3호
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    • pp.243-247
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    • 2019
  • We have developed a compact, wavelength-selectable, Q-switched Nd:YAG laser at mid ultraviolet for chemical warfare agent detection. The fundamental wave at 1064 nm is delivered by a pulsed solid state laser incorporating with a square-type Nd:YAG rod in a resonator closed by two crossed Porro prisms for environmental reliability. The output energy at 213 nm ($5{\omega}$) and 266 nm ($4{\omega}$) by ${\chi}^{(2)}$ process in the sequentially disposed BBO crystals are measured to be 6.8 mJ and 15.1 mJ, respectively. The output wavelength is selected for $5{\omega}$ and $4{\omega}$ by a motorized wavelength switch. The energy ratio of the $5{\omega}$ to the $4{\omega}$ is varied from 0.05 to 0.85 by controlling the phase matching temperature of the nonlinear crystal for sum-frequency generation without change of the output pulse parameters.

활성탄소섬유에 도입된 산소작용기가 유독성 화학작용제 감응특성에 미치는 영향 (Effects of Oxygen Functional Groups introduced onto Activated Carbon Fibers on Gas Sensing Property of Chemical Warfare Agent)

  • 김수현;김민지;송은지;이영석
    • 공업화학
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    • 제30권6호
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    • pp.719-725
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    • 2019
  • 본 실험에서는 활성탄소섬유에 산소플라즈마 처리를 실시하여 산소작용기 도입 함량에 따른 유독성 화학작용제의 모사 가스인 dimethyl methylphosphonate (DMMP) 감응특성에 대하여 고찰하였다. 산소플라즈마 처리 유량이 증가할수록 활성탄소섬유 표면에 산소가 6.90%에서 최대 36.6%까지 도입되어 DMMP 가스 감응특성에 영향을 미치는 -OH가 증가하였다. 그러나 유량이 증가할수록 산소플라즈마 처리 시 발생한 산소 활성종으로 인하여 활성탄소섬유 표면에 식각이 발생하여 비표면적은 감소하는 경향을 보였다. DMMP 가스센서의 저항변화율은 산소플라즈마 처리 유량이 증가함에 따라 4.2%에서 최대 25.1%까지 증가하였다. 이는 산소플라즈마 처리로 인하여 활성탄소섬유에 발달된 -OH와 DMMP 가스의 수소결합으로 인한 것이라 여겨진다. 따라서 산소플라즈마 처리는 상온에서 유독성화학작용제 가스를 감지하기 위한 중요한 표면처리 방법 중 하나라고 판단된다.

지표면 화학작용제 비접촉 탐지를 위한 단자외선 라만분광법 연구 (Deep UV Raman Spectroscopic Study for the Standoff Detection of Chemical Warfare Agents from the Agent-Contaminated Ground Surface)

  • 최선경;정영수;이재환;하연철
    • 한국군사과학기술학회지
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    • 제18권5호
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    • pp.612-620
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    • 2015
  • Short-range detection of chemical agents deposited on ground surface using a standoff Raman system employing a pulsed laser at 248 nm is described. Mounted in a vehicle such as an NBC reconnaissance vehicle, the system is protected against toxic chemicals. As most chemicals including chemical warfare agents have unique Raman spectra, the spectra can be used for detecting toxic chemicals contaminated on the ground. This article describes the design of the Raman spectroscopic system and its performance on several chemicals contaminated on asphalt, concrete, sand, etc.

과황산을 이용한 2,4-D의 산화: 하이드록실아민, 킬레이트제의 영향 (Persulfate Oxidation of 2,4-D: Effect of Hydroxylamine and Chelating Agent)

  • 최지연;윤나경;신원식
    • 한국지하수토양환경학회지:지하수토양환경
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    • 제26권1호
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    • pp.54-64
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    • 2021
  • The chemical warfare agents (CWAs) have been developed for offensive or defensive purposes and used as chemical weapons in war and terrorism. The CWAs are exposed to the natural environment, transported through the water system and then eventually contaminate soil and groundwater. Therefore, effective decontamination technology to remediate CWAs are needed. The CWAs are extremely dangerous and prodution is strictly prohibited, therefore, it is difficult to use CWAs even in experimental purpose. In this study, 2,4-dichlorophenoxyacetic acid (2,4-D) was chosen as a model representative CWA because it is a simulant of anti-plant CWAs and one of the major component of agent orange. The optimum degradation conditions such as oxidant:activator ratio were determined. The effects of hydroxylamine and chelating agents such as citric acid (CA), oxalic acid (OA), malic acid (MA), and EDTA addition to increase Fe2+ activation were also investigated. Scavenger experiments using tert-butyl alcohol (TBA) and ethanol confirmed that although both sulfate (SO4•-) and hydroxyl radical (•OH) existed in Fe2+-persulfate system, sulfate radical was the predominant radical. To promote the Fe2+ activator effect, the effect of hydroxylamine as a reducing agent was investigated. In chelating agents assisted Fe2+-persulfate oxidation, the addition of 2 mM of CA and MA enhanced 2,4-D degradation. In contrast, EDTA and OA inhibited the 2,4-D removal due to steric hindrance effect.

3-아미노프로필트리메톡시실란과 키토산 처리 면직물의 제독 특성 비교 연구 (Comparative Study of Detoxification Properties of 3-Aminopropyl trimethoxysilane and Chitosan treated Cotton Fabric)

  • 권웅;김창규;정의경
    • 한국염색가공학회지
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    • 제32권2호
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    • pp.96-102
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    • 2020
  • Recently, it was reported that chitosan or APTMS(3-aminopropyltrimethoxysila ne) treatment to cotton using the simple pad-dry-cure method has potential to prepare textile materials for military chemical warfare protective clothing. However, it is not confirmed which method is more efficient. Therefore, this study aims to quantitatively compare detoxification properties of chitosan treated cotton fabric with those of APTMS treated cotton fabric. Detoxification properties were evaluated using the well-known organic phosphorous nerve agent stimulant, diisopropylfluorophosphate(DF P). With the same amount of chitosan and APTMS on the surface of the cotton fabrics, APTMS treated cotton fabric exhibited 10% higher detoxification properties than chitosan treated cotton fabric based on the rate of DFP hydrolysis and half-live of DFP calculated from the DFP decontamination ratios of the treated cotton fabrics through time. Therefore, APTMS treatment can be more efficient method to prepare the textile materials for military protective clothing than chitosan treatment.

셀룰로오스 종이 상에 Oxime 도입된 polypyrrole 층을 제조한 신경작용제 선택적 화학저항 센서 (Nerve-Agent Selective Chemiresistors Fabricated by Oxime Decorated Polypyrrole Layer on Cellulose Paper)

  • 전창훈;하태환
    • 한국군사과학기술학회지
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    • 제27권4호
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    • pp.528-534
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    • 2024
  • In continuous research of detecting highly toxic chemical warfare agents to ensure preparedness for the future battlefield, flexible and wearable sensor platforms with high sensitivity are still demanding. Herein we demonstrate a facile fabrication of polypyrrole-based chemiresistors on cellulose paper for the detection of nerve gas simulants. In order to optimize electrical properties of sensor platform, conducting polymer made of polypyrrole were first synthesized on flexible cellulose paper and interdigitated electrodes were formed thereon. Following confirmation of polypyrrole and/or oxime moiety through FT-IR analyses, electrical characteristics were measured in the various ratio of monomers between simple pyrrole and oxime-modified one. Typically for the optimized chemiresistor(2:8 molar ratio of simple pyrrole and oxime-modified one), eleven species of chemical warfare agents were examined and enhanced conductivity(104~105 order) was observed for three simulants(diethyl cyanophosphonate, diisopropyl fluorophosphonate and diethyl chlorophosphonate), which was mainly attributed to intermolecular hydrogen bonding, while no significant responses was recorded against sixteen common volatile organic chemicals.

군사목적의 유해화학물질 제거용 보호복 소재 제조를 위한 섬유 후가공 처리 (Preparation of Self-detoxifying Textile for Removal of Chemical Warfare Agents)

  • 김한일;최익성;박성우;한요한;김성훈;박현배;민문홍
    • 한국염색가공학회지
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    • 제31권1호
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    • pp.33-41
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    • 2019
  • In this report, nano-sized catalysts were introduced onto fabric surface to eliminate toxic chemicals assisted by physical adsorption. For chemical removal of toxic compounds, a series of zirconium-containing catalysts were synthesized and treated on fabric to catalyze the hydrolysis and oxidation of target molecules. Antimicrobial was also introduced for the research purpose to prove the compatibility of as-synthesized catalysts with other solutions. Zirconium ligated with hydroxyl group and MOF(Metal-Organic Frameworks) were exploited as catalyst for removal of toxic compounds, while zinc complex was used for an antimicrobial to culminate in a chemical shield. Once fabrics were functionalized, fabrics were washed 2 or 5 times for a washing durability test. The amount of catalyst in textile were measured by ICP-MS and weight increasing ratio of fabrics.