论文部分内容阅读
以桉树为植物模板,通过氨水浸提、硝酸铁浸渍和马弗炉有氧焙烧等处理制备获取桉树遗态Fe2O3-Fe3O4/C复合材料,借助扫描电镜和X射线衍射分析仪等手段对其进行了结构和性质分析;通过吸附试验研究了初始Sb(Ⅲ)含量、pH、吸附剂投加量以及吸附剂粒径对吸附效果的影响。结果表明,获取的复合材料很好地保留了桉树自身固有的植物本征结构,且Fe2O3和Fe3O4是其主要组成部分,呈现出其对水中Sb(Ⅲ)的良好吸附性能;随着Sb(Ⅲ)初始含量的增加,桉树遗态Fe2O3-Fe3O4/C复合材料对Sb(Ⅲ)的吸附量增大;温度对吸附除Sb(Ⅲ)没有明显影响;初始溶液pH为8时,Sb(Ⅲ)的去除效果最好;适宜吸附剂投加量为0.5 g/50 mL;吸附剂粒径小利于吸附率的提高,但块状材料也显示出良好的吸附性能。
Eucalyptus was used as plant template to prepare eucalyptus hematite Fe2O3-Fe3O4 / C composites by aqueous ammonia leaching, impregnation with ferric nitrate and aerobic roasting in muffle furnace. The eucalyptus-derived Fe2O3-Fe3O4 / C composites were obtained by scanning electron microscopy and X-ray diffraction analysis The structure and properties were analyzed. The effects of initial Sb (Ⅲ) content, pH, adsorbent dosage and adsorbent particle size on adsorption performance were studied by adsorption experiments. The results show that the obtained composite retains the intrinsic structure of Eucalyptus well, and Fe2O3 and Fe3O4 are the main components of Sb (Ⅲ) (Superscript 3 +) increased with the initial content of Fe (superscript 3 +) added. The adsorption of Sb (Ⅲ) on eucalyptus hematite Fe2O3-Fe3O4 / C composites increased. The best adsorbent dosage was 0.5 g / 50 mL. Adsorbent particle size was small for the improvement of adsorption rate, but the bulk material also showed good adsorption performance.