摘要
以太西无烟煤为原料、Fe3O4为添加剂制备煤基磁性活性炭,用不同浓度的盐酸溶液浸泡,测定酸液浸泡前后活性炭的碘值和亚甲蓝值,采用X射线衍射仪和振动样品磁强计分别测定、表征活性炭中含铁化合物的组成和磁性能.结果表明,溶液酸度对磁性活性炭的吸附性能和磁性能均有影响,当溶液酸浓度达到1mol/L时,磁性活性炭浸泡后的碘值提高了7.9%、达732.49mg/g,比磁化系数从259×10-7 m3/kg降低到7.16×10-7 m3/kg,但仍能采用磁场分选回收;当溶液酸浓度达到2mol/L时,磁性活性炭完全失磁.
Magnetic activated carbons （MACs） were prepared from Taixi anthracite in the pres- ence of Fe3O4. The MACs were soaked in hydrochloric acid solution with different concentra- tions. The iodine number and methylene blue value of MACs samples before and after acid so- lution soaking were determined, and X-ray diffraction and a vibrating sample magnetometer were exploited to characterize the Fe-containing components and magnetic performances of MACs, respectively. The results show that the adsorption capacity and magnetic property of MACs are strongly influenced by solution acidity. When the MACs was soaked by hydrochloric acid solution of 1 tool/L, the iodine number is increased by 7. 9% and the maximum iodine number is up to 732.49 mg/g, meanwhile its specific susceptibility reduces from 259 × 10^-7 to 7. 16× 10^-7m^3/kg. But it is still effective for magnetic sorting recycling. MACs thoroughly losses its magnetism when the concentration of the soaking acid solution is 2 mol/L.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2012年第3期469-473,480,共6页
Journal of China University of Mining & Technology
基金
国家高技术研究发展计划(863)项目(2008AA05Z308)
国家自然科学基金项目(20776150)
中国矿业大学(北京)大学生创新计划项目(101141310)
关键词
磁性活性炭
溶液酸度
吸附性能
磁性能
magnetic activated carbons
solution acidity
adsorption property
magnetic prop-erty
