摘要
讨论了侵蚀、煅烧、研磨等方法对天然石灰石除氟性能的影响 .通过SEM、XPS、等离子发射光谱等测定方法 ,分析了石灰石活化除氟性能 ,指出晶格改变、活化点和比表面的变化是影响石灰石活化除氟性能的主要因素 .实验结果表明 ,经Al2 3 + 盐活化的石灰石对氟的去除率提高 2 1 1%～ 2 7 5 % .以其处理BF4-、F-质量浓度分别为 80 0～ 10 0 0mg/L、6 0 0～ 70 0mg/L的含氟废水 ,4～ 5h内即可使废水中氟质量浓度<10mg/L 。
Natural granular limestone prepared by eroding, calcining, grinding, can be used to remove fluo ride and fluoroborate. The removal of fluoride and fluoroborate by activated granular limestone was analyzed by SEM?XPS and ICPQ. The improvement of removing efficiency is due to the change of crystal lattice, and increase in activated positions and specific surface. Test results show that granular limestone prepared by Al 2 3+ salt solution increases fluoride removing efficiency from 21 1% to 27 5%. When the activated granular limestone was used to treat wastewater in which the concentration of BF 4 -, F - is 800～1 000 mg/L?600～700 mg/L respectively, the concentration fo BF -, F - could be less than 10 mg/L in 4～5 h.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2003年第5期611-614,共4页
Journal of Harbin Institute of Technology
