Lt Col Md. Rokonujaman Khan, Ph.D., serves as the Chairman of the Department of Environmental Science at Bangladesh University of Professionals (BUP), Bangladesh. He is an academician and researcher with an interdisciplinary background in environmental science, chemistry, and applied scientific research. He earned his Ph.D. from Jahangirnagar University in 2023, further strengthening his academic expertise and research capabilities.His research interests encompass green nanotechnology, green synthesis of silver nanoparticles, environmental pollution, microplastic contamination in food, cytotoxicity, and antibacterial activity. His research contributions have been published in peer-reviewed international journals, addressing the potential applications of plant-based nanoparticle synthesis, environmental sustainability, and the implications of emerging contaminants for food safety and public health. His work reflects an interest in integrating scientific innovation with practical environmental challenges.In addition to his research contributions, Lt Col Md. Rokonujaman Khan has experience in academic leadership and educational administration. His leadership emphasizes academic discipline, institutional development, and the promotion of quality education. He is committed to fostering an environment that supports teaching, research, professional development, and the advancement of environmental science. His achievements in educational leadership include receiving the Best Educational Institution Head (School) award for Sylhet Cantonment Public School under National Education Week at the Divisional Level in 2024 and the District Level in 2023 and 2024. These recognitions highlight his contributions to institutional leadership and educational development.Through his academic leadership, research activities, and commitment to education, Lt Col Md. Rokonujaman Khan continues to contribute to the development of environmental science education and research in Bangladesh.

Khan, Md. R., Hoque, S. M., Hossain, K. F. B., Siddique, Md. A. B., Uddin, Md. K., & Rahman, Md. M. (2020). Green synthesis of silver nanoparticles using Ipomoea aquatica leaf extract and its cytotoxicity and antibacterial activity assay. Green Chemistry Letters and Reviews, 13(4), 303–315. https://doi.org/10.1080/17518253.2020.1839573 Md. R., Hoque, S. M., Hossain, K. F. B., Siddique, Md. A. B., Uddin, Md. K., & Rahman, Md. M. (2022). Green synthesis of silver nanoparticles using Hibiscus sabdariffa leaf extract and its cytotoxicity assay. Inorganic and Nano-Metal Chemistry, 54(3), 251–261. https://doi.org/10.1080/17518253.2020.1839573 Md. Rokonujaman Khan, Moriom Akter Urmi, Chinnaperumal Kamaraj, Guilherme Malafaia, Chinnasamy Ragavendran, Md. Mostafizur Rahman,Green synthesis of silver nanoparticles with its bioactivity, toxicity and environmental applications: A comprehensive literature review,Environmental Nanotechnology, Monitoring & Management,Volume 20, 2023, 100872, ISSN 2215-1532, https://doi.org/10.1016/j.enmm.2023.100872 M.A., Khan, M.R., Alrehaili, A. et al. Are we eating microplastics with our staple food? A pioneering study of microplastic contamination in store-bought rice and cooked rice in Bangladesh. Environ Sci Pollut Res (2025). https://doi.org/10.1007/s11356-025-36671-2