Cobalt removal from wastewater using pine sawdust

Evans T. Musapatika, Ruella Singh, Krishnie Moodley, Charles Nzila, Maurice S. Onyango, Aoyi Ochieng

Research output: Contribution to journalArticle

Abstract

Agricultural wastes can cause environmental problems if not well managed, but there is a lot of potential to use these wastes as raw material in other processes. In this investigation, pine sawdust was evaluated as an adsorbent in the treatment of wastewater containing cobalt ions. A two-level three-factor full-factorial experimental design with centre points was used to study the interactive effect of the operating parameters in order to achieve the best conditions for the batch adsorption of cobalt ions. A response surface analysis was also conducted to further understand the interactions amongst the factors such as adsorbent dose, solution pH and initial concentration. In addition, adsorption isotherms, namely the Freundlich and Langmuir, were used to characterize the removal of cobalt from the wastewater. It was observed that the combined effect of low adsorbent dose, high pH and high initial concentration of wastewater resulted in the highest adsorption capacity. The Freundlich isotherm provided a better fit to the experimental data than the Langmuir isotherm. Moreover, pine sawdust showed adsorption capabilities for cobalt, and hence it could be an option in the quest to use waste to treat wastewater.
Original languageEnglish
JournalAfrican Journal of Biotechnology
Volume11
Issue number39
Publication statusPublished - 2012

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sawdust
cobalt
Waste Water
Cobalt
Adsorption
wastewater
adsorbents
adsorption
Pinus
Ions
ions
agricultural wastes
sorption isotherms
dosage
wastewater treatment
raw materials
Research Design
experimental design

Cite this

Musapatika, E. T., Singh, R., Moodley, K., Nzila, C., Onyango, M. S., & Ochieng, A. (2012). Cobalt removal from wastewater using pine sawdust. African Journal of Biotechnology, 11(39).
Musapatika, Evans T. ; Singh, Ruella ; Moodley, Krishnie ; Nzila, Charles ; Onyango, Maurice S. ; Ochieng, Aoyi. / Cobalt removal from wastewater using pine sawdust. In: African Journal of Biotechnology. 2012 ; Vol. 11, No. 39.
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Musapatika, ET, Singh, R, Moodley, K, Nzila, C, Onyango, MS & Ochieng, A 2012, 'Cobalt removal from wastewater using pine sawdust', African Journal of Biotechnology, vol. 11, no. 39.

Cobalt removal from wastewater using pine sawdust. / Musapatika, Evans T.; Singh, Ruella; Moodley, Krishnie; Nzila, Charles ; Onyango, Maurice S.; Ochieng, Aoyi.

In: African Journal of Biotechnology, Vol. 11, No. 39, 2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cobalt removal from wastewater using pine sawdust

AU - Musapatika, Evans T.

AU - Singh, Ruella

AU - Moodley, Krishnie

AU - Nzila, Charles

AU - Onyango, Maurice S.

AU - Ochieng, Aoyi

PY - 2012

Y1 - 2012

N2 - Agricultural wastes can cause environmental problems if not well managed, but there is a lot of potential to use these wastes as raw material in other processes. In this investigation, pine sawdust was evaluated as an adsorbent in the treatment of wastewater containing cobalt ions. A two-level three-factor full-factorial experimental design with centre points was used to study the interactive effect of the operating parameters in order to achieve the best conditions for the batch adsorption of cobalt ions. A response surface analysis was also conducted to further understand the interactions amongst the factors such as adsorbent dose, solution pH and initial concentration. In addition, adsorption isotherms, namely the Freundlich and Langmuir, were used to characterize the removal of cobalt from the wastewater. It was observed that the combined effect of low adsorbent dose, high pH and high initial concentration of wastewater resulted in the highest adsorption capacity. The Freundlich isotherm provided a better fit to the experimental data than the Langmuir isotherm. Moreover, pine sawdust showed adsorption capabilities for cobalt, and hence it could be an option in the quest to use waste to treat wastewater.

AB - Agricultural wastes can cause environmental problems if not well managed, but there is a lot of potential to use these wastes as raw material in other processes. In this investigation, pine sawdust was evaluated as an adsorbent in the treatment of wastewater containing cobalt ions. A two-level three-factor full-factorial experimental design with centre points was used to study the interactive effect of the operating parameters in order to achieve the best conditions for the batch adsorption of cobalt ions. A response surface analysis was also conducted to further understand the interactions amongst the factors such as adsorbent dose, solution pH and initial concentration. In addition, adsorption isotherms, namely the Freundlich and Langmuir, were used to characterize the removal of cobalt from the wastewater. It was observed that the combined effect of low adsorbent dose, high pH and high initial concentration of wastewater resulted in the highest adsorption capacity. The Freundlich isotherm provided a better fit to the experimental data than the Langmuir isotherm. Moreover, pine sawdust showed adsorption capabilities for cobalt, and hence it could be an option in the quest to use waste to treat wastewater.

M3 - Article

VL - 11

JO - African Journal of Biotechnology

JF - African Journal of Biotechnology

SN - 1684-5315

IS - 39

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Musapatika ET, Singh R, Moodley K, Nzila C, Onyango MS, Ochieng A. Cobalt removal from wastewater using pine sawdust. African Journal of Biotechnology. 2012;11(39).