中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2015年
4期
1109-1115
,共7页
方帅%刘志强%陈瑜%霍明昕%边德军%杨霞%耿直%朱遂一
方帥%劉誌彊%陳瑜%霍明昕%邊德軍%楊霞%耿直%硃遂一
방수%류지강%진유%곽명흔%변덕군%양하%경직%주수일
四氧化三铁%亚甲基蓝%地下水厂%铁泥%溶剂热法
四氧化三鐵%亞甲基藍%地下水廠%鐵泥%溶劑熱法
사양화삼철%아갑기람%지하수엄%철니%용제열법
Fe3O4%methylene blue%groundwater treatment plant%iron mud%solvothermal synthesis
以地下水厂含铁污泥为原料，利用一步溶剂热法制备出含有Fe3O4的磁性材料。采用磁学性质测量系统、X射线衍射仪、穆斯堡尔谱仪、X射线光电子能谱仪和扫描电镜对铁泥和磁性材料进行表征。结果表明：地下水厂铁泥含铁量较低(16.6%，质量分数)，其杂质主要是硅和铝矿物，粒径约为70 nm，在磁场下不会迁移；经过溶剂热法处理后，生成含有Fe3O4的椭球形磁性材料，粒径达到1.5μm，比饱和磁化强度(Ms)可达18.9 A?m2/kg，在磁场下可迅速向磁极迁移并聚集，体现了良好的磁响应特征。磁性材料对水中亚甲基蓝的吸附效果接近粉末活性炭，在5 min内对10 mg/L亚甲基蓝的吸附效率达到92.3%。本研究方法可以处理含铁量较低的铁泥，实现铁泥的资源化利用，制备的磁性材料在染料废水处理中具有潜在的应用价值。
以地下水廠含鐵汙泥為原料，利用一步溶劑熱法製備齣含有Fe3O4的磁性材料。採用磁學性質測量繫統、X射線衍射儀、穆斯堡爾譜儀、X射線光電子能譜儀和掃描電鏡對鐵泥和磁性材料進行錶徵。結果錶明：地下水廠鐵泥含鐵量較低(16.6%，質量分數)，其雜質主要是硅和鋁礦物，粒徑約為70 nm，在磁場下不會遷移；經過溶劑熱法處理後，生成含有Fe3O4的橢毬形磁性材料，粒徑達到1.5μm，比飽和磁化彊度(Ms)可達18.9 A?m2/kg，在磁場下可迅速嚮磁極遷移併聚集，體現瞭良好的磁響應特徵。磁性材料對水中亞甲基藍的吸附效果接近粉末活性炭，在5 min內對10 mg/L亞甲基藍的吸附效率達到92.3%。本研究方法可以處理含鐵量較低的鐵泥，實現鐵泥的資源化利用，製備的磁性材料在染料廢水處理中具有潛在的應用價值。
이지하수엄함철오니위원료，이용일보용제열법제비출함유Fe3O4적자성재료。채용자학성질측량계통、X사선연사의、목사보이보의、X사선광전자능보의화소묘전경대철니화자성재료진행표정。결과표명：지하수엄철니함철량교저(16.6%，질량분수)，기잡질주요시규화려광물，립경약위70 nm，재자장하불회천이；경과용제열법처리후，생성함유Fe3O4적타구형자성재료，립경체도1.5μm，비포화자화강도(Ms)가체18.9 A?m2/kg，재자장하가신속향자겁천이병취집，체현료량호적자향응특정。자성재료대수중아갑기람적흡부효과접근분말활성탄，재5 min내대10 mg/L아갑기람적흡부효솔체도92.3%。본연구방법가이처리함철량교저적철니，실현철니적자원화이용，제비적자성재료재염료폐수처리중구유잠재적응용개치。
Magnetic material with ferroferric oxide was synthesized by one-step solvothermal method using iron mud with low-iron-content as the raw material. The obtained magnetic material was characterized by magnetic property measurement system (MPMS), X-ray diffraction (XRD), M?ssbauer spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results show that the iron content in iron mud is only 16.6%(mass fraction), while the main impurities are silicon and aluminum oxides, iron mud with the average size of 70 nm does not have any magnetism. After solvothermal process, the obtained magnetic material contains ferroferric oxide and assumes a near-sphere shape with the average size of 1.5 μm. The material possesses well magnetic response, and the specific saturated magnetizing strength reaches 18.9 A?m2/kg, which can be easily magnetic separated from water. Dramatically, the adsorptivity of the material is nearly equivalent to powder active carbon, for example, the removal efficiency of methylene blue (10 mg/L) reaches to 92.3% in 5 min, which contributes to the chemical adsorption between the methylene blue and the material. Therefore, this facile solvothermal method can be applied to dispose iron mud with low-iron-content and make the mud into recoverable resource. Moreover, the prepared magnetic material has a potential application on the treatment of dye wastewater.
