Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution
The present study compared the adsorption capacity of Pb (II) ions from aqueous solution onto biopolymer materials (BPMs): (bean husk (BH) and fish scale (FS)). Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniq...
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doaj-e7a5ce65d1364a869a54c50aee3385472020-11-25T02:03:14ZengIWA PublishingJournal of Water Reuse and Desalination2220-13192408-93702019-09-019324926210.2166/wrd.2019.061061Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solutionChionyedua T. Onwordi0Cosmas C. Uche1Alechine E. Ameh2Leslie F. Petrik3 Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, Cape Town, 7535, South Africa Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, Cape Town, 7535, South Africa Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, Cape Town, 7535, South Africa Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, Cape Town, 7535, South Africa The present study compared the adsorption capacity of Pb (II) ions from aqueous solution onto biopolymer materials (BPMs): (bean husk (BH) and fish scale (FS)). Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to characterize the BPMs. The optimal conditions of the variables: pH, adsorbent dosage, initial metal concentration, contact time and temperature were ascertained. Experimental data were applied to the Langmuir, Freundlich and Temkin sorption isotherms using the linear equations form. The optimal removal of Pb (II) ions with BH and FS was obtained at pH 7.0 and 6.0, and 0.2 g adsorbent dosage each, respectively. The removal of Pb (II) ions fitted the pseudo-second order kinetic model well for the materials. Equilibrium Langmuir isotherm, which indicated a heterogeneous process, gave a better conformity than the other models used for BH while the Temkin isotherm gave better conformity for FS. The FS reached equilibrium faster (at about 30 min) compared to BH (at about 60 min); however, the processes are both spontaneous and endothermic. The BPMs gave about 90% removal of Pb (II) ions at the optimum dosage when used for textile wastewater. The BPMs, therefore, can be used as effective, low-cost and environmentally friendly adsorbents.http://jwrd.iwaponline.com/content/9/3/249adsorption capacitybean huskbiopolymer materialsfish scaleisothermslead |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chionyedua T. Onwordi Cosmas C. Uche Alechine E. Ameh Leslie F. Petrik |
spellingShingle |
Chionyedua T. Onwordi Cosmas C. Uche Alechine E. Ameh Leslie F. Petrik Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution Journal of Water Reuse and Desalination adsorption capacity bean husk biopolymer materials fish scale isotherms lead |
author_facet |
Chionyedua T. Onwordi Cosmas C. Uche Alechine E. Ameh Leslie F. Petrik |
author_sort |
Chionyedua T. Onwordi |
title |
Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution |
title_short |
Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution |
title_full |
Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution |
title_fullStr |
Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution |
title_full_unstemmed |
Comparative study of the adsorption capacity of lead (II) ions onto bean husk and fish scale from aqueous solution |
title_sort |
comparative study of the adsorption capacity of lead (ii) ions onto bean husk and fish scale from aqueous solution |
publisher |
IWA Publishing |
series |
Journal of Water Reuse and Desalination |
issn |
2220-1319 2408-9370 |
publishDate |
2019-09-01 |
description |
The present study compared the adsorption capacity of Pb (II) ions from aqueous solution onto biopolymer materials (BPMs): (bean husk (BH) and fish scale (FS)). Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to characterize the BPMs. The optimal conditions of the variables: pH, adsorbent dosage, initial metal concentration, contact time and temperature were ascertained. Experimental data were applied to the Langmuir, Freundlich and Temkin sorption isotherms using the linear equations form. The optimal removal of Pb (II) ions with BH and FS was obtained at pH 7.0 and 6.0, and 0.2 g adsorbent dosage each, respectively. The removal of Pb (II) ions fitted the pseudo-second order kinetic model well for the materials. Equilibrium Langmuir isotherm, which indicated a heterogeneous process, gave a better conformity than the other models used for BH while the Temkin isotherm gave better conformity for FS. The FS reached equilibrium faster (at about 30 min) compared to BH (at about 60 min); however, the processes are both spontaneous and endothermic. The BPMs gave about 90% removal of Pb (II) ions at the optimum dosage when used for textile wastewater. The BPMs, therefore, can be used as effective, low-cost and environmentally friendly adsorbents. |
topic |
adsorption capacity bean husk biopolymer materials fish scale isotherms lead |
url |
http://jwrd.iwaponline.com/content/9/3/249 |
work_keys_str_mv |
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