摘要
采用热电厂废弃物粉煤灰为吸附剂,对氟离子浓度为100～500mg/L含氟废水进行了除氟研究,并探讨了除氟机理。结果表明,除氟性能与粉煤灰的粒径大小、吸附时间、氟离子初始浓度、废水的pH值、温度等有关。粉煤灰—氟离子体系的吸附行为符合Langmuir吸附等温方程。氟离子在粉煤灰表面形成了氢键吸附和取代吸附。除氟率达90％以上。除氟后的饱和灰烧制成砖块,对环境不引起二次污染。
Removal of fluoride from 100-500mg/L F wastewater with fly ash has been studied, and attempted to explore the adsorption mechanism. The result showed that the adsorption was dependent on the grain size of fly ash, contact time, initial concentration of wastewater. pH and temperature. The experimental data could fit the Langmuir isotherm formula perfectly. Efficiency of difluoridation reached over 90%. It was suggested that making brick with used fly ash would be a good disposal without causing secondary pollution to environment.
出处
《上海环境科学》
CAS
CSCD
1997年第7期30-33,41,共5页
Shanghai Environmental Sciences
基金
上海市环保局科研基金资助项目
