| 季凌晨,刘荣,王国祥,许一凡,许睿.化学通报,2017,80(6):579-583. |
| 含钛高炉渣对水中氨氮的吸附特性 |
| Adsorption characteristics of titanium-bearing blast furnace slag on ammonium in aqueous water |
| 投稿时间：2016-10-30 修订日期：2016-12-28 |
| DOI： |
| 中文关键词: 含钛高炉渣 氨氮 吸附 动力学 等温吸附 |
| 英文关键词:titanium-bearing blast furnace slags ammonium adsorption kinetics isotherm adsorption |
| 基金项目:国家自然科学基金项目（41573061）环境保护部、住房和城乡建设部项目（2012ZX07101-008-02） |
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| 中文摘要: |
| 选用含钛高炉渣作为吸附剂，研究渣的投加量，粒径大小，温度以及溶液初始pH值等因素对含钛高炉渣吸附氨氮的影响及吸附特性。实验结果表明：通过对动力学数据进行分析，发现准二级动力学模型能更好的描述含钛高炉渣对氨氮的吸附，颗粒内扩散方程拟合结果发现含钛高炉渣对氨氮的吸附包括表面吸附和颗粒内扩散两个阶段。吸附等温线拟合发现Langmiur方程能够更好地模拟含钛高炉渣对氨氮的吸附过程。对于100mL浓度为100mg·L-1的氨氮溶液，8g粒径为80~120目的含钛高炉渣在20℃，反应时间4h的条件下，对氨氮的去除率可以达到32%；随着温度的升高，去除率基本呈上升的趋势；溶液初始pH值对氨氮的去除有一定的影响，在碱性条件下有较好的去除效果。 |
| 英文摘要: |
| The adsorption characteristics of ammonium from aqueous solution onto titanium-bearing blast furnace slags were investigated as a function of parameters such as the dosing quantity, particle size, temperature and initial pH. The experimental results showed that the kinetic data fitted the pseudo-second-order model. Adsorption isotherms for titanium-bearing blast furnace slags were fitted the Langmiur model more effectively than other models. For the ammonium concentration of 100 mL 100 mg·L-1, the removal rate could reach 32% under the condition of 20°C, reaction time 4 h, and 8 g, 80~120mesh titanium-bearing blast furnace slag; With the increase of temperature, removal rate basically showed ascendant trend; initial pH had a certain influence on the ammonia nitrogen removal, it has a better removal effect under the alkaline condition. |
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