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Competitive Adsorptive Removal of Pb, Cu and Cd from Water Using Water Pennywort Fixed on Alginate | OMICS International | Abstract
ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
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Research Article

Competitive Adsorptive Removal of Pb, Cu and Cd from Water Using Water Pennywort Fixed on Alginate

Mahamadi C1,*, Mupa M2 and Jackson GE3
1Research and Postgraduate Centre, Bindura University of Science Education, P. Bag 1020, Bindura, Zimbabwe
2Chemistry Department, Bindura University of Science Education, P. Bag 1020, Bindura, Zimbabwe
3Department of Chemistry, University of Cape Town, Rondebosch 7700, South Africa
Corresponding Author : Mahamadi C
Research and Postgraduate Centre
Bindura University of Science Education
P. Bag 1020, Bindura, Zimbabwe
Tel: +26377350801
E-mail: [email protected].zw
Received June 07, 2015; Accepted June 24, 2015; Published June 26, 2015
Citation: Mahamadi C, Mupa M, Jackson GE (2015) Competitive Adsorptive Removal of Pb, Cu and Cd from Water Using Water Pennywort Fixed on Alginate. J Bioremed Biodeg 6:300. doi:10.4172/2155-6199.1000300
Copyright: © 2015 Mahamadi C, et al. This is an open-a ccess article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

The adsorption of Pb (II), Cu (II) and Cd (II) on immobilized water pennywort-Hydrocotyle ranunculoides was investigated in batch and continuous flow systems. Physical characterization of adsorbent was performed using fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). Analysis of batch sorption data using single component and competitive Langmuir models showed that maximum equilibrium sorption capacities for single-metal systems followed the trend (mg/g): Pb(II) (22.25)>Cu(II) (12.55)>Cd(II) (11.45). Mutual interference was probed using normalised equilibrium adsorption capacities, qe'/qe, where the prime indicates the presence of the other metal ion. The results showed that removal of Cu (II) and Cd(II) ions was severely suppressed in the presence of Pb(II) whereas the removal of Pb(II) in the presence of Cu(II) and Cd(II) ions was still effective. Adams-Bohart and Thomas models were used to study the effect of important parameters: bed depth (1.5-2.5 cm), flow rate (2-20 ml/min) and initial metal concentration (10-100 mg/l). It was shown that the Thomas model provided a better fit to the experimental data indicating that mass transfer, i.e. external diffusion was not the rate limiting steps. In conclusion, immobilised H. ranunculoides proved to be a potential biosorbent for the removal of heavy metal ions from aquatic environments.

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