發(fā)布時間：2018-04-23 22:36

  本文選題：花形 + α-Fe2O3�。� 參考：《中北大學(xué)》2015年碩士論文

【摘要】：隨著經(jīng)濟的迅猛發(fā)展，紡織印染行業(yè)排放的染料廢水和工業(yè)生產(chǎn)產(chǎn)生的重金屬污染已經(jīng)成為水體污染的主要來源。為了有效的解決染料廢水和重金屬對水體造成嚴重污染問題，研發(fā)一種水處理材料對于水資源的保護和水污染的治理具有重要的意義。α-Fe2O3是最穩(wěn)定的鐵氧化物，在水處理方面有潛在的應(yīng)用，α-Fe2O3納米材料的吸附能力主要是由于其高表面積和多孔結(jié)構(gòu)。因此，制備不同形貌和高比表面積的α-Fe2O3引起人們的廣泛關(guān)注。 本課題首先采用高溫液相法，通過不同反應(yīng)體系獲得三維微納米氧化鐵。然后，將其應(yīng)用于水污染處理實驗，考查其對鉻離子和剛果紅染料的吸附性能。 （1）采用操作簡單、經(jīng)濟環(huán)保的實驗方法，在乙二醇溶劑內(nèi)，2mL乙二胺為堿源，回流30min，獲得尺寸約為1.5μm的花形α-Fe2O3。通過變量實驗確定了產(chǎn)物形貌的主要影響因素是乙二胺用量、乙二醇用量和回流時間，此外得出了三維花形形貌的可能生長機制。在水處理實驗中，花形α-Fe2O3對剛果紅和Cr(VI)的最大吸附量達到212和14.7mg/g。將不同制備條件所得樣品進行剛果紅染料吸附對比，飽和吸附量分別達到為188、191.2、107.6和210.1mg/g。 （2）在2.5g表面活性劑PV P輔助下，2.7g尿素為堿源，，回流6h，獲得由多孔納米片組裝形成的、尺寸2-3μm的、新穎的花形α-Fe2O3。通過變量實驗得出，產(chǎn)物形貌非常依賴PVP用量和回流時間。由于新穎花形α-Fe2O3的高表面積和多孔結(jié)構(gòu)，其對剛果紅和Cr(VI)的最大吸附量高到628.9和25.1mg/g。此外，兩種吸附等溫線符合Langmuir吸附模型。
[Abstract]:With the rapid development of economy, dyestuff wastewater from textile printing and dyeing industry and heavy metal pollution from industrial production have become the main source of water pollution. In order to effectively solve the problem of serious pollution caused by dyestuff wastewater and heavy metals, it is of great significance to develop a kind of water treatment material for the protection of water resources and the treatment of water pollution. 偽 -Fe _ 2O _ 3 is the most stable iron oxide. The adsorption ability of 偽 -Fe _ 2O _ 3 nanomaterials is mainly due to its high surface area and porous structure. Therefore, the preparation of 偽-Fe _ 2O _ 3 with different morphology and high specific surface area has attracted much attention. In this paper, three-dimensional micro-nano ferric oxide was obtained by high temperature liquid phase method in different reaction systems. Then, it was applied to water pollution treatment experiment to study the adsorption properties of chromium ion and Congo red dye. 1) A flower-shaped 偽 -Fe _ 2O _ 3 with the size of 1.5 渭 m was obtained by using simple operation, economical and environmental protection method, using 2 mL ethylenediamine as alkali source in ethylene glycol solvent and refluxing for 30 min. The main factors affecting the morphology of the product were determined by variable experiments: the amount of ethylenediamine, the amount of ethylene glycol and the reflux time. In addition, the possible growth mechanism of the three-dimensional flower morphology was obtained. In the experiment of water treatment, the maximum adsorption amounts of floral 偽 -Fe _ 2O _ 3 on Congo red and Cr-VI were 212 and 14.7 mg / g. The adsorption capacity of Congo red dye by different preparation conditions was up to 188191.2107.6 and 210.1 mg / g, respectively. A novel flower-shaped 偽 -Fe _ 2O _ 3 with the size of 2-3 渭 m was obtained by refluxing for 6 h with 2.5 g surfactant PVP as the base source and refluxing for 6 h. The results show that the morphology of the product is very dependent on the amount of PVP and the reflux time. Due to the high surface area and porous structure of novel floral 偽 -Fe _ 2O _ 3, the maximum adsorption amounts of Congo red and Cr-VI are up to 628.9 and 25.1 mg / g. In addition, the two isotherms fit the Langmuir adsorption model.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.1

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