Bhabani Devi H P Sarma


Globally, the discharge of heavy metals into the water bodies is a matter of serious concern. Heavy metals like cadmium are considered as toxic even at very low concentration. Several conventional methods are available to remove heavy metals from the wastewater. They bear high costs, generate high sludge, and consume high energy. Biosorbents provides many beneficial properties due to their good adsorption capacity for heavy metals. The present work focuses on the potential of waste leaves of Averrhoa carambola (WACLP) as an adsorbent for its ability to remove Cd (II) ions from synthetic water by batch experimental process. The adsorbent was characterized by using elemental analysis, Energy Dispersive X-ray or EDAX and Scanning Electron Micrograph (SEM). The batch experiment was carried out considering various parameters such as pH, initial metal ion concentration, contact time and dose of the adsorbent. The fitting of the experimental data was done by Langmuir, Freundlich and Temkin isothermal models. The study on isothermal models revealed that the experimental parameters were best fitted to the Langmuir isothermal model with R2 value of 0. 976.The Kinetic studies showed pseudo second order depicting chemisorption. The results showed that Averrhoa carambola is a good adsorbent for cadmium and hence it can widen the scope and prospects for future studies on heavy metal removal from the aqueous solution.


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Adsorption isotherm, Averrhoa carambola, Cadmium, Conventional, Heavy metals, Kinetics

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Devi, B., & Sarma, H. P. (2023). Equilibrium isotherm and kinetic study of biosorption of cadmium from synthetic water using wastes leaves of Averrhoa carambola. Journal of Applied and Natural Science, 15(2), 826–843. https://doi.org/10.31018/jans.v15i2.4598
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