Sb(Ⅲ)在蒙脱土、高岭土和针铁矿表面的吸附:pH值和离子强度的影响
ADSORPTION OF ANTIMONY(Ⅲ)ON MONTMORILLONITE,KAOLINITE AND GOETHITE: EFFECT OF PH AND IONIC STRENGTH
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摘要: 研究蒙脱土、高岭土和针铁矿在不同pH值与离子强度的条件下对Sb(Ⅲ)的吸附及解吸行为.结果表明,随pH值的升高,Sb(Ⅲ)的吸附减弱,离子强度对Sb(Ⅲ)在三种矿物表面的吸附影响较弱,而矿物表面吸附的Sb(Ⅲ)不易解吸.三种矿物对Sb(Ⅲ)的吸附能力差别较大,蒙脱土的吸附量远大于针铁矿和高岭土,针铁矿的吸附量稍高于高岭土.Abstract: The adsorption and desorption of Sb(Ⅲ)on montmorillonite,kaolinite and goethite were investigated at different pH and ionic strength.Results indicated that Sb(Ⅲ)adsorption decreased with the increase of pH. On the other hand,the effect of ionic strength on Sb(Ⅲ)adsorption was slight.The desorption of Sb(Ⅲ)was low.The adsorption capacity of three minerals for Sb(Ⅲ)had significantly differences.The montmorillonite had much greater Sb(Ⅲ)adsorption capacity than the other two minerals.The goethite had slight greater adsorption capacity than kaolinite.
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Key words:
- Sb(Ⅲ) /
- adsorption /
- kaolinite /
- montmorillonite /
- goethite /
- pH /
- ionic strength
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