Authors : Surekha B. Ghorpade; Rajendra P. Patil; Ashok V. Borhade

Volume/Issue : Volume 11 - 2026, Issue 5 - May

Google Scholar : https://tinyurl.com/mrenzy3m

Scribd : https://tinyurl.com/mrmt8td2

DOI : https://doi.org/10.38124/ijisrt/26May1642

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

Abstract : The increasing release of toxic heavy metals into aquatic environments due to rapid industrialization raises serious environmental and public health issues worldwide. In this study, mesoporous bromosodalite (BR-SOD) was successfully produced from coal fly ash using a cost-effective and sustainable hydrothermal method. It was tested as an adsorbent for removing hazardous Pb2+, Hg2+, and Cu2+ ions from water. The material was thoroughly characterized with techniques such as Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, Field Emission Scanning Electron Microscopy (FE-SEM), High-Resolution Transmission Electron Microscopy (HR-TEM), and Energy Dispersive X-ray Spectroscopy (EDS) mapping to examine its structural, morphological, and surface features. Characterization confirmed the successful formation of crystalline bromosodalite with a highly mesoporous structure, greatly improving its ability to adsorb metal ions. Batch experiments were performed to optimize key operational parameters such as pH, adsorbent dose, initial metal ion concentration, contact time, and temperature. These experiments were conducted at three temperatures: 301.15 K, 323.15 K, and 343.15 K. The equilibrium data were modelled using the Langmuir isotherm, and the resulting parameters clarified the adsorption mechanism. The synthesized BR-SOD showed excellent ability to adsorb and a high affinity for Pb2+, Hg2+, and Cu2+ ions, thanks to its large surface area, porous structure, and plentiful active sites. Results indicate that bromosodalite derived from coal fly ash is a cost-effective, efficient, and environmentally friendly adsorbent for removing toxic heavy metals from wastewater. This research presents a valuable method for transforming industrial waste into useful materials for environmental cleanup.

Keywords : Sodalite; Adsorption; Isotherms; Mesoporous; Langmuir

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