| 石英与水溶液作用的界面反应特征 |
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| 引用本文： | 吴宏海,黄瑞敏,胡勇有,郭晓磊.石英与水溶液作用的界面反应特征[J].化学研究与应用,2001,13(3):280-283. |
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| 作者姓名： | 吴宏海 黄瑞敏 胡勇有 郭晓磊 |
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| 作者单位： | 华南理工大学造纸与环境工程学院, |
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| 基金项目： | 华南理工大学自然科学基金项目 !(E5— 3 0 2 0 80 )，广东省博士后科学基金资助项目 |
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| 摘 要： | 矿物表面因存在有各种悬空键 ,而形成了表面活性官能团 ,称作“表面位”。对石英来说 ,表面氧离子可以与水中Ｈ+和ＯＨ- 离子反应 ,使表面产生荷电性。研究表明1 ,2 ] ,石英对二价金属离子的吸附反应遵循Ｆｒｅｕｄｌｉｃｈ方程 ,本文在分析石英表面位及其质子化反应、表面位与重金属离子反应的基础上 ,进一步探讨石英与水溶液作用的界面反应特征及其影响因素。1 实验材料与方法石英粉末样品用王水煮洗 ,后用纯净水浸洗至无ＡｇＣｌ,过滤、1 1 0℃烘干、450℃煅烧 1 2ｈ。经ＮＯＶＡ 1 0 0 0ＶＥＲ3.7自动表面分析仪 (Ｎ2 ＢＥＴ法 )测定…
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| 关 键 词： | 表面位 石英 重金属 界面反应 水溶液 质子化反应 重金属离子 吸附 |
| 文章编号： | 1004-1656(2001)03-0280-04 |
| 修稿时间： | 2000年4月14日 |
CHARICTERISTICS OF REACTION AT INTERFACE BETWEEN QUARTZ AND AQUEOUS SOLUTION |
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| WU Hong-hai,HUANG Rui-min,HU Yong-you,GUO Xiao-lei.CHARICTERISTICS OF REACTION AT INTERFACE BETWEEN QUARTZ AND AQUEOUS SOLUTION[J].Chemical Research and Application,2001,13(3):280-283. |
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| Authors: | WU Hong-hai HUANG Rui-min HU Yong-you GUO Xiao-lei |
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| Abstract: | In this paper,the surface sites of quartz and their protonation were first analyzed and discussed,and then the surface reaction of heavy metal ions,involving Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,with quartz were completely investigated.The pH PPZC (pristine point of zero charge) for quartz was about 2.8 and the surface protonation constants in log form,lg K int 1 and lg K int 2,were about -1.5,7.0,respectively.The adsorption mass of Cu 2+ decreased with the ionic strength changing from 0.1 to 1.0mol/L;while the adsorption mass of heavy metal ions,including Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,decreased with raise in temperature.The experimental results showed that the surface reaction of heavy metal ions with quartz was surface complexation adsorption in model and the supporting electrolyte ions had taken part in competing adsorption under the experimental conditions. |
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| Keywords: | surface site quartz heavy metal ions reaction at interface |
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