摘要
针对放射废水中三种典型核素去除开展了沉淀絮凝-吸附的实验研究。根据模拟放射性废水的核素的特点,对比不同沉淀剂、絮凝剂和吸附剂对三种核素的去除效果,并开展了铯离子的吸附动力学和竞争离子的影响实验。结果表明,以碳酸钠为沉淀剂可以去除93.2%的锶离子,以聚合硫酸铁为絮凝剂可去除98%以上的锶离子和钴离子,以自制的焦磷钒酸锆为吸附剂可去除99%的铯离子,并且自制的焦磷钒酸锆吸附剂对铯离子具有快速吸附和高效选择的特点。该沉淀絮凝-吸附工艺对钴、锶、铯三种模拟核素的去除率可接近100%,产生的二次废物少,可为核电站放射性废水处理的设计提供技术参考。
A process for removing cobalt, strontium and cesium from simulated radioactive wastewater by precipitation, flocculation and adsorption, and the characteristics of this process were studied. In this process, simulated radioactive wastewater was treated with sodium carbonate as a precipitant, polymeric ferric sulfate as a flocculant and vanadium zirconium pyrophosphate as an absorbent. The results of the experiments of precipitant and flocculant selection show that 98% strontium and cobalt can be removed by sodium carbonate and polymeric ferric sulfate. The remaining cesium in simulated radioactive wastewater can be removed via adsorption processes by vanadium zirconium pyrophosphate. These results confirmed that nearly 100% cobalt, strontium and cesium in simulated radioactive wastewater could be removed via a precipitation flocculation and adsorption processes.
出处
《南方能源建设》
2015年第4期81-87,共7页
Southern Energy Construction
基金
国家863计划资助项目(2012AA063504)
中国博士后科学基金资助项目(2014M562227)
关键词
放射性废水
核电厂
沉淀
絮凝
吸附
radioactive wastewater
nuclear power plant
precipitation
flocculation
adsorption
