磁性氧化铁/活性炭复合吸附剂的制备及性能

Preparation and Characteristics of Iron Oxide Magnetic/Activated Carbon Composite Adsorbents

为了得到磁特性和吸附性能比较好的吸附材料,把活性炭的吸附特性和氧化铁的磁特性结合起来制成复合吸附剂, 在随后的吸附饱和后用一个简单的磁选工序从介质中分离出来.制备了磁性流体和超细磁粉,并与活性炭进行复合,加入不同的活化剂制成活性炭/磁性氧化铁复合吸附剂.进行了磁力、Fe含量、BET表面积测量以及XRD衍射分析.通过用碘吸附值法测定吸附剂的吸附性能,运用线性回归法得到吸附等温线.研究结果表明,所得到的复合吸附剂不仅具有磁性,而且具有良好的吸附性能.

The adsorption characteristics of activated carbon and the magnetic properties of iron oxides were combined to produce magnetic composites. These composites could be used as adsorbent and subsequently removed from the medium by a simple magnetic procedure. Magnetic liquid and macro-magnetic powder were synthesized with activated carbon, with different activated agentia added. It was characterized by magnetization measurements, Fe content, BET surface area and XRD diffraction analyses. Adsorptive iodine capability of composites (including activated carbon) was achieved and adsorptive isotherm curves were obtained. It was indicated that iron oxide magnetic/activated carbon composites had better adsorptive capability as well as magne-(tism.)