Biosorption of Cd (II), Cr (VI) & Pb (II) from Aqueous Solution Using Mirabilis jalapa as Adsorbent

Gurijala Ramakrishna  Naidu; Yakkala  Kalyan; Yadamari  Tharakeswar; Shaik Abdul Shahanaz  Begum

doi:10.4236/jeas.2015.52007

Shaik Abdul Shahanaz Begum, Yadamari Tharakeswar, Yakkala Kalyan, Gurijala Ramakrishna Naidu^*

Abstract: Mirabilis jalapa (chandrakantha) leaves were used as a biosorbent for the removal of toxic metals ions cadmium (II), chromium (VI) and lead (II) from water. The physiochemical properties of the developed biosorbent were studied using FTIR. The efficiency of this developed biosorbent was tested using batch experiments under controlled conditions such as a function of pH, contact time, initial metal concentration and the optimization amount of biosorbent. The residual metallic ion concentrations of cadmium (II), chromium (VI) and lead (II) were determined using AAS. The biosorption capacity of Mirabilis jalapa was found to be pH dependant and the percentage removal of cadmium (II), chromium (VI) and lead (II) was increased with increasing adsorbate solution pH and a maximum value was reached at an equilibrium pH = 6 for cadmium (II), pH = 5.5 for chromium (VI) and pH 4.5 for lead (II) respectively. The equilibrium time required for the saturation loading of cadmium (II), chromium (VI) and lead (II) in the biosorbent was found to be about 120 min. The obtained equilibrium biosorption data was fitted to the linear forms of Freundlich isotherms. The results proved the efficiency of Mirabilis jalapa leaves powder as biosorbent for the removal of metal ions and it can be used for the development of an efficient, clean and novel technology for waste water treatment.

Keywords: Mirabilis jalapa, Biosorption, Toxic Metal Ions, Isotherm Models

Cite this paper: Begum, S. , Tharakeswar, Y. , Kalyan, Y. and Naidu, G. (2015) Biosorption of Cd (II), Cr (VI) & Pb (II) from Aqueous Solution Using Mirabilis jalapa as Adsorbent. Journal of Encapsulation and Adsorption Sciences, 5, 93-104. doi: 10.4236/jeas.2015.52007.

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