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Journal of Chemistry
Volume 2013, Article ID 649142, 7 pages
Research Article

Adsorption of Cd (II), Cu (II), and Zn (II) from Aqueous Solution onto Nitrogen-Functionalized Desmostachya bipinnata

1Central Department of Chemistry, Tribhuvan University, Kirtipur, P.O. Box 5506, Kathmandu, Nepal
2Department of Agricultural Biotechnology, Padua University, Legnaro, Italy

Received 7 December 2012; Revised 28 February 2013; Accepted 28 February 2013

Academic Editor: Concha Gimeno

Copyright © 2013 Jagjit Kour et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A very simple means of nitrogen functional group grafting onto the backbone of Desmostachya bipinnata is investigated, which is a sacrificial herb in the south Asian region particular to Hindu religion. This natural biomaterial is found to be very effective for metal binding, after treatment with hydrazine monohydrate. The present study explores a comparison of amination processes by considering several options. The maximum metal loading capacities for Cd, Cu, and Zn were found to be 76.80 mg/g, 72.10 mg/g, and 58.16 mg/g, respectively. The kinetic evaluation indicated that the adsorption of Cd, Cu, and Zn onto the biomaterials followed the pseudo second-order rate equation.