含钛高炉渣对水中氨氮的吸附特性  

Adsorption Characteristics of Titanium-Bearing Blast Furnace Slags for Ammonia Nitrogen in Water

作　　者：季凌晨 刘荣[1] 王国祥[1] 许一凡[1] 许睿[1] Ji Lingchen Liu Rong Wang Guoxiang Xu Yifan Xu Rui(Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Controlling, School of Environment, Nanjing Normal University, Nanjing 210023)

机构地区：[1]南京师范大学环境学院江苏省物质循环与污染控制重点实验室江苏省地理信息资源开发与利用协同创新中心,南京210023

出　　处：《化学通报》2017年第6期579-584,共6页Chemistry

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等因素对含钛高炉渣吸附水中氨氮的影响及吸附特性。动力学数据分析表明,准二级动力学模型能更好地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。吸附等温线拟合表明Langmiur方程能够更好地模拟含钛高炉渣对氨氮的吸附过程。在20℃、反应时间4h的条件下,对于100mL浓度为100mg/L的氨氮溶液,8g粒径为80~120目的含钛高炉渣对氨氮的去除率可以达到32%;随着温度的升高,去除率基本呈上升趋势;溶液初始pH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。The effects of adding dosage and the size of the slags, the temperature, and the initial pH on the adsorption of ammonia nitrogen from water were studied by using the titanium blast furnace slag as the adsorbent. The kinetic analysis showed that the pseudo-second-order model can better describe the adsorption of ammonia on titanium-bearing blast furnace slags. Adsorption isotherm fitting showed that the Langmiur equation can better simulate the adsorption process. Under the conditions of 20℃ , reaction time of 4h, 8 g （80 - 120mesh） slags, and 100mL （100mg/L） ammonia nitrogen solution, the removal rate of ammonia nitrogen could reach 32%. With the increasing of temperature, removal rate basically showed ascendant trend. Initial pH had a certain influence on the ammonia nitrogen removal, and it has a better removal effect under the alkaline condition.

关 键 词：含钛高炉渣 氨氮 吸附 动力学 等温吸附 

分 类 号：O647.3[理学—物理化学]