Process optimization for Ni(II) removal from wastewater by calcined oyster shell powders using Taguchi method.
Waste oyster shells cause great environmental concerns and nickel is a harmful heavy metal. Therefore, we applied the Taguchi method to take care of both issues by optimizing the controllable factors for Ni(II) removal by calcined oyster shell powders (OSP), including the pH (P), OSP calcined temper...
| Publicado en: | Journal of Environmental Management Vol. 161; pp. 344 - 350 |
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| Autores principales: | , |
| Formato: | Artículo |
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Academic Press Inc.
Sep2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=109126090&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 109126090 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Sep2015 vid: 161 pid: 735 pub: Academic Press Inc. artinfo: ui: 109126090 10.1016/j.jenvman.2015.07.024 ppf: 344 ppct: 6 formats: tig: atl: Process optimization for Ni(II) removal from wastewater by calcined oyster shell powders using Taguchi method. aug: au: Yen, Hsing Yuan Li, Jun Yan affil: Department of Chemical and Biochemical Engineering, Kao Yuan University, No. 1821, Zhongshan Rd., Lujhu Dist., Kaohsiung City 82151, Taiwan su: Process optimization Nickel & the environment Wastewater treatment Calcination (Heat treatment) Oyster shell Taguchi methods sug: subj: Metal service centres Sewage Treatment Facilities Process optimization Nickel & the environment Wastewater treatment Calcination (Heat treatment) Oyster shell Taguchi methods keyword: Adsorption Nickel Oyster shell powders Precipitation Taguchi method Adsorption Nickel Oyster shell powders Precipitation Taguchi method ab: Waste oyster shells cause great environmental concerns and nickel is a harmful heavy metal. Therefore, we applied the Taguchi method to take care of both issues by optimizing the controllable factors for Ni(II) removal by calcined oyster shell powders (OSP), including the pH (P), OSP calcined temperature (T), Ni(II) concentration (C), OSP dose (D), and contact time (t). The results show that their percentage contribution in descending order is P (64.3%) > T (18.9%) > C (8.8%) > D (5.1%) > t (1.7%). The optimum condition is pH of 10 and OSP calcined temperature of 900 °C. Under the optimum condition, the Ni(II) can be removed almost completely; the higher the pH, the more the precipitation; the higher the calcined temperature, the more the adsorption. The latter is due to the large number of porosities created at the calcination temperature of 900 °C. The porosities generate a large amount of cavities which significantly increase the surface area for adsorption. A multiple linear regression equation obtained to correlate Ni(II) removal with the controllable factors is: Ni(II) removal (%) = 10.35 × P + 0.045 × T − 1.29 × C + 19.33 × D + 0.09 × t − 59.83. This equation predicts Ni(II) removal well and can be used for estimating Ni(II) removal during the design stage of Ni(II) removal by calcined OSP. Thus, OSP can be used to remove nickel effectively and the formula for removal prediction is developed for practical applications. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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