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Experimental Research Paper | Chemical Engineering | Volume 15 Issue 6, June 2026 | Pages: 545 - 547 | India
Experimental Investigation of Heavy Metal Ion Removal Using Agricultural Waste Derived Biochar Adsorbents
Abstract: Heavy metal contamination in water resources has become a serious environmental concern due to increasing discharge from industrial and domestic activities. The present investigation evaluates the adsorption performance of agricultural waste derived biochar prepared from coconut husk, rice husk and sugarcane bagasse for removal of Cu2+, Fe2+ and Co2+ ions from aqueous solutions using batch adsorption experiments conducted at room temperature (27°C) with an equilibrium contact duration of 30 minutes. Colorimetric analysis supported by calibration curve validation demonstrated linear absorbance-concentration behaviour for the investigated metal ion solutions. Comparative adsorption analysis indicated that coconut husk biochar achieved approximately 67% removal efficiency for Cu2+ ions, while rice husk biochar showed improved adsorption performance for Co2+ ions with removal efficiency of about 43%, compared with approximately 50% removal obtained using commercial activated carbon under identical experimental conditions. Adsorption equilibrium behaviour evaluated using Freundlich isotherm modelling for cobalt ion dataset produced regression coefficient R2 = 0.9362, indicating favourable heterogeneous multilayer adsorption behaviour. The results confirm that agricultural waste derived biochar materials can serve as economical alternatives to commercial activated carbon for removal of transition metal ions from aqueous systems.
Keywords: biochar adsorption, agricultural residues, heavy metals, cobalt removal, Freundlich isotherm, low-cost adsorbents
How to Cite?: Ishaan Reddy, Arshi Banu P S, "Experimental Investigation of Heavy Metal Ion Removal Using Agricultural Waste Derived Biochar Adsorbents", Volume 15 Issue 6, June 2026, International Journal of Science and Research (IJSR), Pages: 545-547, https://www.ijsr.net/getabstract.php?paperid=SR26609120815, DOI: https://dx.dx.doi.org/10.21275/SR26609120815