Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM)
Background: The removal of heavy metals using adsorption techniques with low cost biosorbents is being extensively investigated. The improved adsorption is essentially due to the pores present in the adsorbent. One way of improving the porosity of the material is by irradiation of the precursor usin...
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| Format: | Citation Index Journal |
| Language: | English |
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2009
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| Online Access: | http://scholars.utp.edu.my/id/eprint/571/ http://scholars.utp.edu.my/id/eprint/571/1/paper.pdf |
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| author | M.G., Pillai I., Regupathi M.H., Kalavathy T., Murugesan L.R., Miranda |
| author_facet | M.G., Pillai I., Regupathi M.H., Kalavathy T., Murugesan L.R., Miranda |
| author_sort | M.G., Pillai |
| building | UTP Institutional Repository |
| collection | Online Access |
| description | Background: The removal of heavy metals using adsorption techniques with low cost biosorbents is being extensively investigated. The improved adsorption is essentially due to the pores present in the adsorbent. One way of improving the porosity of the material is by irradiation of the precursor using microwaves. In the present study, the adsorption characteristics of nickel onto microwave-irradiated rice husks were studied and the process variables were optimized through response surface methodology (RSM). Result: The adsorption of nickel onto microwave-irradiated rice husk (MIRH) was found to be better than that of the raw rice husk (RRH). The kinetics of the adsorption of Ni(II) from aqueous solution onto MIRH was found to follow a pseudo-second-order model. Thermodynamic parameters such as standard Gibbs free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°)were also evaluated. The thermodynamics of Ni(II) adsorption onto MIRH indicates that it is spontaneous and endothermic in nature. The response surface methodology (RSM) was employed to optimize the design parameters for the present process. Conclusion: Microwave-irradiated rice husk was found to be a suitable adsorbent for the removal of nickel(II) ions from aqueous solutions. The adsorption capacity of the rice husk was found to be 1.17 mg g-1. The optimized parameters for the current process were found as follows: adsorbent loading 2.8 g (100 mL)-1; Initial adsorbate concentration 6 mg L-1; adsorption time 210 min.; and adsorption temperature 35°C. © 2008 Society of Chemical Industry.
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| first_indexed | 2025-11-13T07:23:38Z |
| format | Citation Index Journal |
| id | oai:scholars.utp.edu.my:571 |
| institution | Universiti Teknologi Petronas |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-13T07:23:38Z |
| publishDate | 2009 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:scholars.utp.edu.my:5712017-01-19T08:25:48Z http://scholars.utp.edu.my/id/eprint/571/ Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) M.G., Pillai I., Regupathi M.H., Kalavathy T., Murugesan L.R., Miranda TP Chemical technology Background: The removal of heavy metals using adsorption techniques with low cost biosorbents is being extensively investigated. The improved adsorption is essentially due to the pores present in the adsorbent. One way of improving the porosity of the material is by irradiation of the precursor using microwaves. In the present study, the adsorption characteristics of nickel onto microwave-irradiated rice husks were studied and the process variables were optimized through response surface methodology (RSM). Result: The adsorption of nickel onto microwave-irradiated rice husk (MIRH) was found to be better than that of the raw rice husk (RRH). The kinetics of the adsorption of Ni(II) from aqueous solution onto MIRH was found to follow a pseudo-second-order model. Thermodynamic parameters such as standard Gibbs free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°)were also evaluated. The thermodynamics of Ni(II) adsorption onto MIRH indicates that it is spontaneous and endothermic in nature. The response surface methodology (RSM) was employed to optimize the design parameters for the present process. Conclusion: Microwave-irradiated rice husk was found to be a suitable adsorbent for the removal of nickel(II) ions from aqueous solutions. The adsorption capacity of the rice husk was found to be 1.17 mg g-1. The optimized parameters for the current process were found as follows: adsorbent loading 2.8 g (100 mL)-1; Initial adsorbate concentration 6 mg L-1; adsorption time 210 min.; and adsorption temperature 35°C. © 2008 Society of Chemical Industry. 2009 Citation Index Journal NonPeerReviewed application/pdf en http://scholars.utp.edu.my/id/eprint/571/1/paper.pdf M.G., Pillai and I., Regupathi and M.H., Kalavathy and T., Murugesan and L.R., Miranda (2009) Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM). [Citation Index Journal] http://www.scopus.com/inward/record.url?eid=2-s2.0-66149116418&partnerID=40&md5=bb12c082936485199cf351736e64643d 10.1002/jctb.2038 10.1002/jctb.2038 10.1002/jctb.2038 |
| spellingShingle | TP Chemical technology M.G., Pillai I., Regupathi M.H., Kalavathy T., Murugesan L.R., Miranda Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title | Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title_full | Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title_fullStr | Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title_full_unstemmed | Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title_short | Optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (RSM) |
| title_sort | optimization and analysis of nickel adsorption on microwave irradiated rice husk using response surface methodology (rsm) |
| topic | TP Chemical technology |
| url | http://scholars.utp.edu.my/id/eprint/571/ http://scholars.utp.edu.my/id/eprint/571/ http://scholars.utp.edu.my/id/eprint/571/ http://scholars.utp.edu.my/id/eprint/571/1/paper.pdf |