World Wildlife Day 2026

 

Per- and Polyfluoroalkyl Substances (PFAS): An Overview

PFAS are a large group of synthetic chemicals characterized by strong carbon-fluorine bonds, granting them stability and resistance to heat, water, and oil. They are widely used in industrial applications, consumer products, and firefighting foams.

Environmental Presence:

Due to their persistence, PFAS are found globally in soil, water, and biota, raising concerns about ecological and human health.

Exposure in Biota

Bioaccumulation and Biomagnification: PFAS tend to bioaccumulate in aquatic and terrestrial organisms, moving up the food chain. They are detected in fish, birds, mammals, and humans.

Toxicological Effects: 

Liver damage: Altered lipid metabolism, hepatomegaly.

Immune suppression: Reduced vaccine efficacy, immune cell dysfunction.

Endocrine disruption: Hormone level alterations, reproductive issues.

Developmental toxicity: Birth defects, developmental delays.

Carcinogenic potential: Some PFAS are classified as possibly carcinogenic. 

Hossain et al. 2025 reported that Per- and polyfluoroalkyl substances (PFAS) exposure in biota and remediation strategies: Toxicological and biochemical perspectives. 

Highlighted following points.

• PFAS concentration showed in plant, finfish and shellfish.
• Represented detoxification processes for PFAS.
• Changes metabolic routes for N and C.
• Represented enzyme and non-enzymes activities.
• Impacts of PFAS showed in different species.

Mechanisms of Toxicity: PFAS interact with nuclear receptors (e.g., PPARα), disrupting lipid and glucose metabolism, and induce oxidative stress, leading to cellular damage.

Remediation Strategies

Physical Methods: 

Activated Carbon Adsorption: Effective for water purification but limited by saturation

Ion Exchange Resins: Target specific PFAS compounds, useful for water treatment

Membrane Filtration: Nanofiltration and reverse osmosis remove PFAS but are energy-intensive

Chemical Methods: 

Advanced Oxidation Processes: Limited effectiveness due to PFAS stability.

Chemical Destruction: Emerging techniques such as electrochemical oxidation and high-temperature incineration.

Biological Methods: 

Bioremediation: Research ongoing; certain microbes show potential for PFAS degradation, though typically slow and limited.

Phytoremediation: Use of plants to uptake PFAS, still under investigation.

Emerging Technologies: 

Supercritical Water Oxidation: Potential for complete mineralization.

Electrochemical Degradation: Promising for specific PFAS compounds.

Reference: 

Hossain M.M., Nawaz, MZ., Dar, MA., et al. (2025) Per- and polyfluoroalkyl substances (PFAS) exposure in biota and remediation strategies: Toxicological and biochemical perspectives. Journal of Hazardous Materials Advances 17,  100579. https://doi.org/ 10.1016/j.hazadv.2024.100579.

Welcome to Abdullah Al Nahian at CBEES

Abdullah Al Nahian is a dedicated researcher and professor specializing in environmental toxicology. His work focuses on assessing the impact of various toxic substances on ecosystems and human health. Through his research, Abdullah aims to understand the mechanisms of toxicity and develop strategies for mitigating environmental hazards. His contributions have been instrumental in advancing knowledge in the field, and he is recognized for his meticulous approach and commitment to environmental protection. Abdullah Al Nahian's expertise in environmental toxicology makes him a valuable contributor to efforts aimed at promoting a healthier and safer environment.

Abdullah Al Nahian

nahian@aqiu-edu.com, a.nahian43@yahoo.com 

Biography

MSc, BSc – University of Chittagong, Bangladesh

Research Area

Molecular Biology, Genetics, Environmental Toxicology etc. 

IFFAT JAHAN

jahan@aqiu-edu.com

Biography 

MSc in Chemistry, Mawlana Bhashani Science and Technology University

BSc in Chemistry, Mawlana Bhashani Science and Technology University

Research Area

Heavy metal, Remediation, Pollutant, Risk Assessment, etc.

Welcome to Iffat Jahan at CBEES

Welcome to Iffat Jahan at CBEES as Research Fellow. She graduated from Mawlana Bhashani Science and Technology University, Bangladesh. Her research interest in heavy metal, remediation and risk assessment.   

Iffat Jahan is a distinguished Research Fellow at CBEES. She has made significant contributions to her field through her rigorous research and innovative approach. Her work at CBEES reflects her dedication to advancing knowledge and addressing critical issues. As a highly respected researcher, Iffat Jahan continues to contribute valuable insights and foster academic excellence within the institution.

Run For The River

Theme: Run For The River

Date: May 23, 2026

Organised:  CBEES & BCFRC

Event Coordinator: Dr. Md Muzammel Hossain

Run through a "water" obstacle, such as a series of foam blocks or a shallow water pit, to simulate the river's role as a habitat for aquatic life.

Run along a "riverbank" or a designated path lined with trees or other vegetation to represent the river's ecosystem.

Run through a simulated "cityscape" or a busy area to highlight the importance of rivers for human needs, such as water supply and transportation.

Run through a "polluted" area, marked by obstacles or challenges such as "oil slicks" or "chemical spills," to raise awareness about the environmental impact of human activities on rivers.

Run uphill or on uneven terrain to replicate the river's course through mountains, canyons, and valleys.

Run up a small hill or incline to simulate the melting of glaciers, which is a primary source of many rivers.

Virtual run is a flexible, non-competitive running event that participants can complete at their own convenience and location within a specified time frame. It allows individuals to run, walk, or jog anywhere—such as parks, trails, treadmill, or streets—while still participating in a collective event. Jog or walk along a winding path, symbolizing the meandering journey of a river from its source.

Inquire or contact : Dr. Md Muzammel Hossain (muzammel3@gmail.com ).

For Details visit on WFMD