A green approach for the removal of green approach for the removal of heavy metals Cadmium and Copper from synthetic waste water using Cinnamomum tamala (Buch.-Ham.) T.Nees. & C.H.Eberm.
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Date
2020-12
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Due to non biodegradability, contamination by heavy metals generally Cd (II) and Cu (II) has become a very serious issue since they cause toxic health effects in human and other life forms on earth, even at trace level. Therefore, it is crucial to treat
contaminated wastewater before discharging it into the environment. This present study focuses on the use of Cinnamomum tamala as a leaves-based biosorbent, collected from Medicinal plants Research and Development Centre (MRDC), Pantnagar to sequestrate heavy metals Cd (II) and Cu (II) from synthetic wastewater. AAS results showed that the best adsorption for Cd (II) and Cu (II) was obtained in contact time of 120 minutes, at acidic pH 4.1 and 45±2ºC temperature. The maximum removal of Cd (II) and Cu (II) at 25±2ºC and 45±2ºC temperature was recorded to be 33% and 70%, 51% and 74% respectively. Cu (II) was found to have
more affinity. Langmuir, Freundlich and Temkin isotherm models, were applied to explain adsorption phenomenon. Regenerated biosorbent was found to exhibit binding capacity upto four cycles as indicated by AAS. First order, Second order, Pseudo-first
order, Pseudo-second order and Elovich kinetics models were used. Pseudo secondorder model best describes adsorption kinetic data. The FT-IR analysis revealed that the main functional groups involved in biosorption were alcohols, nitriles, carboxylic
acids, amides, nitro. Hence, this easy and simple methodology for the remediation of wastewater by removal of toxic metals Cd (II) and Cu (II) may contribute to the sustainability of a clean environment by avoiding the accumulation of excessive waste,
that takes considerable time for degradation.