Kyzas George Z, Deliyanni Eleni A, Lazaridis Nikolaos K
Laboratory of General & Inorganic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
Laboratory of General & Inorganic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
J Colloid Interface Sci. 2014 Sep 15;430:166-73. doi: 10.1016/j.jcis.2014.05.049. Epub 2014 Jun 5.
In this study, impregnation of microporous activated carbon with magnetite was achieved by co-precipitation of iron salts onto activated carbon. The evaluation of the adsorption ability of this material was examined using the anionic dye Reactive Black 5 as model dye pollutant (adsorbate). The effect of pH, ionic strength, contact time and initial dye concentration were also studied. It was found that high pH and high ionic strength favor the adsorption of Reactive Black 5. The adsorption kinetics and isotherms were well fitted by the fractal BS model and Langmuir model, respectively. The impregnation with magnetite decreases the adsorption capacity of activated carbon. Thermal re-activation of dye-loaded activated carbons was also succeeded. The characterization of the magnetic carbons was investigated by various techniques (SEM/EDAX, VSM, BET, FTIR, XRD, DTG) revealing many possible interactions in the carbon-dye system.
在本研究中，通过将铁盐共沉淀到活性炭上实现了用磁铁矿对微孔活性炭的浸渍。使用阴离子染料活性黑5作为模型染料污染物（吸附质）来考察该材料的吸附能力。还研究了pH值、离子强度、接触时间和初始染料浓度的影响。结果发现，高pH值和高离子强度有利于活性黑5的吸附。吸附动力学和等温线分别很好地符合分形BS模型和朗缪尔模型。用磁铁矿浸渍会降低活性炭的吸附容量。对负载染料的活性炭进行热再活化也取得了成功。通过各种技术（扫描电子显微镜/能量散射X射线谱、振动样品磁强计、比表面积分析仪、傅里叶变换红外光谱仪、X射线衍射仪、差示热重分析仪）对磁性碳进行了表征，揭示了碳 - 染料体系中许多可能的相互作用。
