• Nguyen Xuan Truong (Corresponding Author) Institute of System Integration, Military Technical Academy


Chemical toxicity; Chemical accident; Dispersion; ALOHA; ChemCode.


The paper proposes a model (based on the Gauss distribution) for the chemical toxicity dispersion in air. A computer software (named as ChemCode) has been also developed using language C/C++ (together with software tools as Visual Studio 2013/2017, Spyder, Python and other libraries NumPy, Matplotlib,...) for fast calcuations of chemical toxicity concentration in chemical accidents as a function of latitudes and time. The ChemCode is validated through a comparison of calulation time and calculated results of chemical toxicity concentration with those obtained from an international commercial software, ALOHA (USA). The ChemCode has been developed for supporting the planning of command decision and response of the military force to a chemical accident.


. Bùi Tá Long, “Mô hình hóa môi trường”, Thành phố Hồ Chí Minh: Nhà xuất bản Đại học Quốc gia Tp. Hồ Chí Minh, 441 trang, 2008.

. Bùi Tá Long, Nguyễn Minh Nam, "Mô hình mô phỏng quá trình lan truyền và khuếch tán chất bẩn trong bài toán thiết lập hệ thống quan trắc sự nhiễm bẩn trong môi trường không khí," Khí tượng Thủy văn, vol. 10, pp. 38-47, 1997.

. Bùi Tá Long, Nguyễn Châu Mỹ Duyên, "Mô hình hóa ô nhiễm không khí trong điều kiện địa hình phức tạp - trường hợp nguồn thải điểm," Khí tượng Thủy văn, vol. 04, pp. 35-45, 2019.

. Bernatik, W. Zimmerman, M. Pitt, M. Strizik, V. Nevrly, Z. Zelinger, "Modelling Accidental Releases of Dangerous Gases into the Lower Troposphere from Mobile Sources," Process safety and environmental protection, vol. 86, no. 3, pp. 198-207, 2008.

. Zhang Jianwen, Lei Da, Feng Wenxing, "Analysis of chemical disasters caused by release of hydrogen sulfide-bearing natural gas," Procedia Engineering, vol. 26, pp. 1878-1890, 2011.

. Xiaoping Liu , Zhen Peng, Xianghua Liu and Rui Zhou, "Dispersion Characteristics of Hazardous Gas and Exposure Risk Assessment in a Multiroom Building Environment," International Journal of Environmental Research and Public Health, vol. 17, no. 199, 2019.

. Pasquill, F., Smith, F.R., “Atmospheric Diffusion”, 440: John Wiley and Sons Inc, 1983.

. Briggs Gary A, “Diffusion estimation for small emissions”, Oak Ridge: TN:Atmospheric Turbulence and Diffusion Laboratory, 1973.

. Robert Jones, William Lehr, Debra Simecek-Beatty, R. Michael Reynolds, ALOHA - “Areal Locations of Hazardous Atmospheres”, Technical Documentation, Seattle, WA: NOAA Technical Memorandum NOS OR&R 43, 2013.

. James A. Romato, Brian J. Lukey, Harry Salem, “Chemical Warfare Agents: chemistry, pharmacology, toxicology and therapeutics”, United States of America: Taylor & Francis Group, ISBN 978-1-4200-4661-8, 2008.

. EPA United States Environmental Protection Agency.



How to Cite

Trường. “A MODEL FOR CALCULATION OF CHEMICAL TOXICITY CONCENTRATION DISPERSED IN AIR”. Journal of Military Science and Technology, no. 75, Oct. 2021, pp. 107-13, https://en.jmst.info/index.php/jmst/article/view/274.



Research Articles