Shahnaz, Tasrin2024-02-052024-02-052022ROLL NO.176106114https://gyan.iitg.ac.in/handle/123456789/2538Supervisor: Narayanaswamy, SelverajuThe significance of water as a resource for the survival of humanity is incomparable. With the rapid advancement in various technologies, the demand for water usage has been augmented exponentially. From the industry domain to fulfilling the basic necessity for the people, water conservation with proper qualitative allocation has been at the forefront of all activities. While the swift developments in the technological industries have been a boon for appeasing the hefty consumer demand in the market, it leaves a deterrent impact on the environment. To eradicate the grave danger to the aquatic environment, the treatment of wastewater is crucial and imperative. The first study of the thesis work examines the efficiency of the removal of hexavalent chromium using physicochemically activated lignocellulosic biomass from Acacia auriculiformis (Fabaceae family). The treatment involved sulphuric acid activation followed by pyrolysis resulting in chemically modified activated carbon. Further, it was complexed with a chelating agent i.e. EDTA. Acid treatment and complexation with chelating agents improvised the biosorbent’s sorption capacity towards chromium species. Adsorption parameters like pH, adsorbent dosage, temperature, and initial metal concentration were optimised in the batch study.enThesis