吹脱—离子交换耦合工艺处理页岩提钒高浓度氨氮废水研究郑巧巧1.doc

doi：10.3969/j.issn.1007-7545.2019.06.015吹脱 doi：10.3969/j.issn.1007-7545.2019.06.015 郑巧巧1，张一敏1,2,3,4，黄晶2,3,4，包申旭1,2,4 (1.武汉理工大学 资源与环境工程学院，武汉 430070； 2.矿物资源加工与环境湖北省重点实验室，武汉 430070； 3.国家环境保护矿冶资源利用与污染控制重点实验室，武汉 430081； 4.钒资源高效利用湖北省协同创新中心，武汉 430081) 摘要：利用吹脱法—离子交换耦合工艺处理钒页岩提钒高浓度氨氮废水，首先考察pH、温度、气液比体积比（L/L）对氨氮去除效果的影响，然后研究离子交换处理过程中废水pH、流速和串联级数对树脂吸附效果的影响，最后考察树脂循环稳定性能。结果表明，吹脱的最佳条件为pH=10.5、温度40 ℃、气液比3 200，吹脱处理后氨氮浓度为1 999.56 mg/L。树脂合适的吸附pH为8，流速为9 mL/min，两级串联吸附后氨氮去除率达99%以上。体积浓度18%的硫酸对氨氮的解吸率大于99%，经10次吸附解吸循环后，吸附性能稳定。 关键词：沉钒废水；氨氮；吹脱；离子交换 中图分类号：X703 文献标志码：A 文章编号：1007-7545（2019）06-0000-00 Study on Treatment of High Concentration Ammonia Nitrogen Wastewater from Vanadium Shale Extraction by Stripping-Ion Exchange Coupling Process ZHENG Qiao-qiao1, ZHANG Yi-min1,2,3,4, HUANG Jing2,3,4, BAO Shen-xu1,2,4 (1. School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China; 2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, China; 3. State Key Laboratory of Environmental Protection Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan 430081, China; 4. Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan 430081, China) Abstract：High concentration ammonia nitrogen wastewater from vanadium shale extraction was treated by air stripping-ion exchange coupling process. Firstly, effects of pH value, temperature and volume ratio of gas to liquid (G/L, L/L) on removal efficiency of ammonia nitrogen from vanadium precipitation wastewater were investigated. Secondly, effects of pH value, flow rate and series number on resin adsorption were studied. Finally, adsorption stability of resin for ammonia nitrogen was studied. The results show that the optimum conditions for stripping include pH value of 10.5, temperature of 40 ℃ and G/L of 3 200, concentration of ammonia nitrogen is 1 999.56 mg/L after stripping. Suitable pH value of resin adsorption is 8 and flow rate