废酸中铁离子的回收及共沉淀法制备纳米四氧化三铁的工艺研究
发布时间：2018-08-17 09:46
【摘要】：纳米四氧化三铁不仅具有比表面积大、磁性强等优点,而且价格低廉、原料易得,因此逐渐成为纳米材料应用领域的主力军,在磁流体、生物医药材料、信息材料、吸波材料等领域都有着广泛的应用。由于其性能上的优势和应用领域的广泛,纳米四氧化三铁已经成为诸多学者研究的重点,其制备工艺自然也成为研究热点之一。 对废酸中金属的处理方法有很多种,而利用树脂对废酸中的金属进行回收利用,则是一种设备简单、操作方便、有一定经济效益的方法。该方法利用离子交换树脂的功能基团和溶液中杂质离子的交换、解析能力的差异达到分离的目的。 本论文以从工业废酸中的回收的铁离子为原料,利用共沉淀原理在浸没循环撞击流反应器中制备纳米Fe_3O_4。对废酸中铁离子回收的研究中,本文重点讨论了不同条件下树脂对铁离子吸附交换的效率以及树脂的脱附再生效率。首先通过静态实验,研究了不同温度、pH、脱附剂的浓度等条件下树脂对废酸中铁离子的吸附交换与脱附再生效率,然后利用静态实验提供的条件参数在不同流速下对树脂的吸附交换与脱附再生作动态对比实验,最终确定了最佳的工艺条件。利用从废酸中回收的铁离子,将其中Fe~(2+)和Fe~(3+)比例适当调节后作为实验中制备纳米Fe_3O_4的原料。实验重点研究了撞击流共沉淀过程中的条件优化,分别以反应温度、Fe~(2+)和Fe~(3+)比例、转子速率以及反应终点的pH值作为正交实验的正交因子,考察其对沉淀颗粒平均粒径的影响程度,从而确定制备的最佳工艺条件。
[Abstract]:Nanocrystalline ferric oxide not only has the advantages of large specific surface area, strong magnetism, but also low price, easy to obtain raw materials, so it has gradually become the main force in the application of nanomaterials, such as magnetic fluids, biomedical materials, information materials, etc. Wave absorbing materials and other fields have been widely used. Due to its advantages in performance and wide application fields, nano-ferric oxide has become the focus of many scholars, and its preparation technology has naturally become one of the research hot spots. There are many methods to treat metal in waste acid, and it is a simple equipment, convenient operation and certain economic benefit to recycle the metal in waste acid by resin. This method uses the functional group of ion exchange resin and the exchange of impurity ions in solution to achieve the purpose of separation. In this paper, the iron ions recovered from industrial waste acid were used as raw materials to prepare nano-Fe _ 3O _ 4 in immersion cycle impingement reactor by co-precipitation principle. In the study of iron ion recovery from waste acid, the efficiency of adsorption and exchange of resin for iron ion and the efficiency of resin desorption and regeneration under different conditions were discussed in this paper. At first, the adsorption, exchange and desorption efficiency of iron ions in waste acid were studied by static experiments under different temperature and pH, desorption agent concentration and so on. Then the dynamic contrast experiment of resin adsorption exchange and desorption regeneration was made by using the conditions provided by static experiment at different flow rates, and the optimum technological conditions were finally determined. The Fe ~ (2) and Fe ~ (3) were used as raw materials for the preparation of nanocrystalline Fe_3O_4 by using Fe ~ (2) and Fe ~ (3) which were recovered from the waste acid and the ratio of Fe ~ (2) and Fe ~ (3) was adjusted appropriately. The experiment focuses on the optimization of the conditions in the coprecipitation process of the impinging stream. The orthogonal factors of the orthogonal experiment are the ratio of Fe ~ (2) and Fe ~ (3) to the reaction temperature, the rotor rate and the pH value of the reaction end point, respectively. The influence of the particle size on the average diameter of the precipitated particles was investigated, and the optimum preparation conditions were determined.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：O614.811
本文编号：2187225
[Abstract]:Nanocrystalline ferric oxide not only has the advantages of large specific surface area, strong magnetism, but also low price, easy to obtain raw materials, so it has gradually become the main force in the application of nanomaterials, such as magnetic fluids, biomedical materials, information materials, etc. Wave absorbing materials and other fields have been widely used. Due to its advantages in performance and wide application fields, nano-ferric oxide has become the focus of many scholars, and its preparation technology has naturally become one of the research hot spots. There are many methods to treat metal in waste acid, and it is a simple equipment, convenient operation and certain economic benefit to recycle the metal in waste acid by resin. This method uses the functional group of ion exchange resin and the exchange of impurity ions in solution to achieve the purpose of separation. In this paper, the iron ions recovered from industrial waste acid were used as raw materials to prepare nano-Fe _ 3O _ 4 in immersion cycle impingement reactor by co-precipitation principle. In the study of iron ion recovery from waste acid, the efficiency of adsorption and exchange of resin for iron ion and the efficiency of resin desorption and regeneration under different conditions were discussed in this paper. At first, the adsorption, exchange and desorption efficiency of iron ions in waste acid were studied by static experiments under different temperature and pH, desorption agent concentration and so on. Then the dynamic contrast experiment of resin adsorption exchange and desorption regeneration was made by using the conditions provided by static experiment at different flow rates, and the optimum technological conditions were finally determined. The Fe ~ (2) and Fe ~ (3) were used as raw materials for the preparation of nanocrystalline Fe_3O_4 by using Fe ~ (2) and Fe ~ (3) which were recovered from the waste acid and the ratio of Fe ~ (2) and Fe ~ (3) was adjusted appropriately. The experiment focuses on the optimization of the conditions in the coprecipitation process of the impinging stream. The orthogonal factors of the orthogonal experiment are the ratio of Fe ~ (2) and Fe ~ (3) to the reaction temperature, the rotor rate and the pH value of the reaction end point, respectively. The influence of the particle size on the average diameter of the precipitated particles was investigated, and the optimum preparation conditions were determined.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：O614.811
【引证文献】
相关硕士学位论文 前1条
1 张建华;干酪乳清脱盐技术研究[D];中国农业科学院;2012年
，本文编号：2187225
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