| Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility |
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| 作者姓名： | QIN Yan-wen PAN Gang ZHANG Ming-ming LI Xian-liang |
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| 作者单位： | [1]StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China [2]QingdaoUniversityofScience＆Technology,Qingdao266042,China |
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| 基金项目： | TheNationalNaturalScienceFoundationofChina(No .2 0 0 730 60 ) ,andtheHundredTalentScientistProgramofChineseAcademyofSciences |
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| 摘 要： | The adsorption and desorption processes of Zn(Ⅱ) on τ-MnOOH as a function of particle concentrations (Cp) were studied. An obvious Cp effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of Cp, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of Cp. The Cp-reversibility relationship confirmed the metastable-equilibrium adsorption (MEA) inequality (Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption densitιy ι is not a state variable, the Cp-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory.
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| 关 键 词： | 锌 吸附作用 水锰矿 可逆性 τ-MnOOH AAS 水系 |
| 收稿时间： | 2003/6/23 0:00:00 |
| 修稿时间： | 2003/9/14 0:00:00 |
Adsorption of zinc on manganite (gamma-MnOOH): particle concentration effect and adsorption reversibility |
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| QIN Yan-wen,PAN Gang,ZHANG Ming-ming,LI Xian-liang.Adsorption of zinc on manganite (gamma-MnOOH): particle concentration effect and adsorption reversibility[J].Journal of Environmental Sciences,2004,16(4):627-630. |
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| Authors: | Qin Yan-wen Pan Gang Zhang Ming-ming Li Xian-liang |
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| Affiliation: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. |
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| Abstract: | The adsorption and desorption processes of Zn(II) on gamma-MnOOH as a function of particle concentrations (Cp) were studied. An obvious Cp effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of Cp, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of Cp. The Cp-reversibility relationship confirmed the metastable-equilibrium adsorption (MEA) inequality (Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption density see symbol in text] is not a state variable, the Cp-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory. |
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