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Research Paper | Chemistry | India | Volume 3 Issue 6, June 2014

Comparative Study of the Adsorption of Cu (II) and Cr (VI) ions from aqueous solution Using Raw Annona squmosa

C. Renuka Devi | T. Santhi ^[3]

Abstract: In this study the adsorption of heavy metal Cu (II) and Cr (VI) ions using raw carbon from Annona squmosa (RAS) was carried out [1]. The use of cheap eco friendly adsorbents prepared from freely and abundantly available Annona squmosa (RAS) seed have been investigated by batch methods. The effects of pH; concentration; adsorption capacity have been investigated. Adsorption capacity of Annona squmosa (RAS) was showed highest value around pH=5 for Cu (II) ions and pH=3 for Cr (VI) ions. The applicability of the linear form Langmuir model to RAS was proved by the high correlation coefficients R2=0.9994 for Cu (II) ion adsorption and low R2=0.9817 value for Cr (VI) ions. The results of this investigation show that activated carbon was prepared from Annona Squmosa seed (RAS) was higher adsorption capacity for removal of Cu (II) ions than Cr (VI) ions from aqueous solutions. The equilibrium adsorption is achieved in 120 min for Cu (II) and 1hour 30 min for Cr (VI). The isotherms like Langmuir and (D- R) were well fitted for adsorption of Cr (VI) ions and Langmuir; Elovich; Freundlich and Dubinin Radushkevich (D-R) were well fitted for adsorption of Cu (II) ions. Monolayer adsorption behavior was explained using Langmuir-type isotherm for adsorption of Cu (II) and Cr (VI) ions. The kinetic study of Cu (II) and Cr (VI) ions and were explained using Pseudo-first-order; Pseudo-second-order; Elovich and Intraparticle diffusion equations. [2]

Keywords: Annona squmosa, Adsorption, Desorption, Kinetics, Adsorption isotherm

Edition: Volume 3 Issue 6, June 2014,

Pages: 2119 - 2128

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