Md. Ahsan Habib，Analysis of heavy metals and POPs invarious environmental matrices including road dusts collected from vicinity of municipal and medical waste landfills and incineration plants, sediments, fishes and water samples. Analysis of PFASs using passive samplers and in water samples collected from contaminated water with textile wastewater. Monitoring and source identification of PCBs, PCNs, PAHs using passive air samplers in China, South Korea, Japan and Bangladesh. Synthesis of nanomaterials and use them as photocatalysts for degradation of organic pollutants in aqueous and non-aqueous systems. Development of activated carbon materials from waste biomass for removal of heavy metals and organic pollutants from aqueous systems. Development of new ion sources for mass spectrometry. More than 65 research articles in Scopus/SCI indexing journals.