【摘要】 采用自制半透膜水解法,以自制生物聚合铁为原料,以NaOH为沉淀剂,制备Fe3O4纳米粒子,并用XRD和TEM等方法对产物进行了表征,研究它对Pb2+,Cu2+及Cr(Ⅵ)的辅助吸附及分离特性.结果表明:Fe3O4纯度较高,平均粒度在15nm左右;利用Fe3O4的大比表面和表面原子配位不足及顺磁性的特点,将其与浮游球衣菌复合,提高了对重金属离子的吸附效果,该复合吸附剂经再生可重复使用;纳米Fe3O4粒子可成为浮游球衣菌的絮凝核心而有助于体系的澄清.更多还原

【Abstract】 By hydrolization method with half permeable membrane, Fe3O4 nano-particles were prepared, using self made bio-polymeric ferric sulphate as raw materials and NaOH as sediment agent. The product was characterised by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Their characters of auxiliary adsorption and separation to heavy metal ions lead(Ⅱ) , copper (Ⅱ) and chromium (Ⅳ) were studied. The results indicated that the purity of Fe3O4 was high and their average size was about 15nm. Based on the characters of huge surface area and lack of surface coordinate and paramagnetism of Fe3O4 nano-particles, composite Sphearotilus natans with Fe3O4 to improve their adsorption effect. The composite adsorbent can be reused by regeneration. Fe3O4 nano particles could become the coagulation cores of Sphearotilus natans and help the system turn into clarification.更多还原