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Title: Adsorption of toxic metallic ions (Hg<sup>2+</sup>, Pb<sup>2+</sup> and Zn<sup>2+</sup>) by Sweet Orange bark (<i>Citrus sinensis</i>) — A study
Authors: Kumar, Ramesh
Kumari, Kalpna
Issue Date: Jun-2010
Publisher: CSIR
Abstract: The presence of toxic metal ions like Hg<sup>2+</sup>, Pb<sup>2+</sup>, and Zn<sup>2+</sup> etc. in industrial waste has attracted world wide attention. A variety of methods has been investigated and developed for removal of toxic metal ions including oxidation, co-precipitation adsorption, distillation and ion exchange. The selection of the removal method is ultimately dependent upon the technology being validated in terms of sustainability, efficiency adsorption and cost effectiveness. Based on there criteria adsorption method is considered to be the most suitable. Adsorption of toxic metal ions like Hg<sup>2+</sup>, Pb<sup>2+</sup> and transition metal Zn<sup>2+</sup> ion on different agricultural by-product were measured by UV-visible spectrophotometer – 108. Adsorption of metal ions follows the order polymerized <i>Citrus sinensis </i>is (mosambi) skin> other absorbent. <i>Citrus sinensis </i>skin showed maximum adsorbing capacity for Hg<sup>2+</sup> and Pb<sup>2+</sup> metal ions. It could also be seen that Hg<sup>2+</sup> metal ion is a good absorbing adsorbate as compared to Pb<sup>2+</sup> and Zn<sup>2+</sup> metal ions. The values of freundlich constants (n and k) are estimated and found to be 1/n <1 and k>1.
Description: 27-29
ISSN: 0975-2412 (Online); 0771-7706 (Print)
Appears in Collections:BVAAP Vol.18(1) [June 2010]

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