Journal of Food, Agriculture and Environment

Sorption behavior of Zn (II) ions by low cost and biological natural hydroxyapatite/chitosan composite from industrial waste water

Author(s):

R. Bazargan-Lari ^1*, M. E. Bahrololoom ¹, A. Nemati ²

Recieved Date: 2011-07-11, Accepted Date: 2011-10-06

Abstract:

Waste waters that contain heavy metal ions like Zn(II) are dangerous for the environment and can be removed by N-HAP/chitosan composite. Chitosan is one of the chitin derivatives that is the second most abundant polymer in nature and is found in the exoskeletons of insects and shellfish. Chitosan is derived from useless and inexpensive material. Natural hydroxyapatite (N-HAP) extracted from bone ash is a good substitution for commercial HAP and is lower in cost than commercial HAP, and has an easier method of preparation too. N-HAP and chitosan which are both made from biological materials, have the potential of sorption of heavy metal ions. In this paper the sorption capacity of N-HAP/chitosan composite is investigated to find the advantages of this composite material. Sorption of Zn(II) ions has been studied by equilibrium sorption methods like Langmuir and Freundlich. Furthermore, thermodynamic and kinetic sorption experiments are carried out in different pH and particle sizes. Results show that the maximum sorption of Zn(II) on NHAP/ chitosan particles is 1.692 mmol/g at pH 7.5 and 47.6 nm particle size, and better performance was obtained through a 47.6 nm particle size, and higher pH values. The most favorable and spontaneous characteristic of the sorption process was proved by thermodynamic and kinetic sorption experiments.

Keywords:

Natural hydroxyapatite, chitosan, heavy metal ions, adsorption, bone ash

---

Journal: Journal of Food, Agriculture and Environment
Year: 2011
Volume: 9
Issue: 3&4
Category: Environment
Pages: 892-897

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :