發(fā)布時間：2018-08-17 09:46

【摘要】：納米四氧化三鐵不僅具有比表面積大、磁性強等優(yōu)點,而且價格低廉、原料易得,因此逐漸成為納米材料應(yīng)用領(lǐng)域的主力軍,在磁流體、生物醫(yī)藥材料、信息材料、吸波材料等領(lǐng)域都有著廣泛的應(yīng)用。由于其性能上的優(yōu)勢和應(yīng)用領(lǐng)域的廣泛,納米四氧化三鐵已經(jīng)成為諸多學(xué)者研究的重點,其制備工藝自然也成為研究熱點之一。 對廢酸中金屬的處理方法有很多種,而利用樹脂對廢酸中的金屬進行回收利用,則是一種設(shè)備簡單、操作方便、有一定經(jīng)濟效益的方法。該方法利用離子交換樹脂的功能基團和溶液中雜質(zhì)離子的交換、解析能力的差異達到分離的目的。 本論文以從工業(yè)廢酸中的回收的鐵離子為原料,利用共沉淀原理在浸沒循環(huán)撞擊流反應(yīng)器中制備納米Fe_3O_4。對廢酸中鐵離子回收的研究中,本文重點討論了不同條件下樹脂對鐵離子吸附交換的效率以及樹脂的脫附再生效率。首先通過靜態(tài)實驗,研究了不同溫度、pH、脫附劑的濃度等條件下樹脂對廢酸中鐵離子的吸附交換與脫附再生效率,然后利用靜態(tài)實驗提供的條件參數(shù)在不同流速下對樹脂的吸附交換與脫附再生作動態(tài)對比實驗,最終確定了最佳的工藝條件。利用從廢酸中回收的鐵離子,將其中Fe~(2+)和Fe~(3+)比例適當(dāng)調(diào)節(jié)后作為實驗中制備納米Fe_3O_4的原料。實驗重點研究了撞擊流共沉淀過程中的條件優(yōu)化,分別以反應(yīng)溫度、Fe~(2+)和Fe~(3+)比例、轉(zhuǎn)子速率以及反應(yīng)終點的pH值作為正交實驗的正交因子,考察其對沉淀顆粒平均粒徑的影響程度,從而確定制備的最佳工藝條件。
[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.
【學(xué)位授予單位】：武漢工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：O614.811

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 張建華;干酪乳清脫鹽技術(shù)研究[D];中國農(nóng)業(yè)科學(xué)院;2012年

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本文編號：2187225