Removal of Zinc (II) and Ni (II) by using Bio-Polymer “Chitin”



Baby AbrarUnnisa Begum1, N. Devanna2, *, P. Ramesh Chandra3, Razia Sultana4
1 Department of Chemistry, SWCET, Hyderabad, Telangana, India
2 Department of Chemistry, JNTUA, Anantapuram, A.P., India
3 Retd. Senior Environmental Scientist, Pollution Control Board, A.P, India
4 Retd Director of EPTRI Telangana Hyderabad, India

Abstract

Introduction:

The increasing level of toxic metals in the environment is causing serious repercussions on the health of human beings. To mitigate the adverse effects of heavy metal concentration on the receiving waters, it is necessary to develop an affordable cost effective technology, which is effective to remove the heavy metals. The purpose of the present work is to investigate the removal of Nickel and Zinc ions from the water using known adsorbents. Chitin is a biopolymer used as an adsorbent to remove metal ions from the solution. Chitin is an inexpensive adsorbent and is available abundantly.

Methods and materials:

In this study, the adsorption techniques, such as variations at different pH levels, contact time and dosage of known concentration of different metal standard solutions and quantity of adsorbent were carried out. The experimental data is attached overleaf with different isotherms and kinetic models.

Results:

The results revealed that the optimum pH found in the removal of Zn and Nickel ions was 6-6.5. The equilibrium was attained after 7 minutes. The low pore size was observed to be very effective for adsorption. The results of the experimental data revealed that the adsorption process follows the first order kinetic model. By using Langmuir isotherm, the adsorption capacity of Chitin was evaluated.

Conclusion:

The results indicate that the Chitin is one of the best adsorbents for the removal of cations from the aqueous solution.

Keywords: Nickel, Zinc, Langmuir Isotherm, Chitin, Adsorption Isotherm.


Abstract Information


Identifiers and Pagination:

Year: 2018
Volume: 5
Publisher Item Identifier: EA-CHEM-2018-9

Article History:

Received Date: 8/5/2018
Revision Received Date: 1/6/2018
Acceptance Date: 7/9/2018
Electronic publication date: 23/10/2018
Collection year: 2018

© 2018 Begum et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Correspondence: Address correspondence to this author at the Department of Chemistry, JNTUA, Anantapuram, A.P., India; Tel: 9440580507; E-mail: devanna.chemistry@jntu.ac.in