含钛蒙脱土制备及其在模拟废水处理中的应用

发布时间：2018-03-27 07:37

  本文选题：含钛蒙脱土　切入点：吸附　出处：《沈阳化工大学》2017年硕士论文

【摘要】：在化工企业中有一句话说:“水是工业的血液”。因此,水源是现代化工企业不可缺少的材料。伴随经济的进步,近些年来工业废液的排放已经成为环境水污染的主要源头之一。例如:造纸厂、染料厂、电镀厂等排放的废水中,含有大量有害的重金属离子和有机物,会危害水生生物,影响饮用水源,给人类的身体健康带来严重危害。一种新型的低成本吸附材料的应用和发展,是处理含重金属废水的重中之重。改性蒙脱土具有操作简单、吸附效率高、污染小、无腐蚀等优点。它是一种绿色、高效的吸附剂,具有广阔的应用前景。本文创新处在于,未使用传统的溶胶-凝胶(sol-gel)法制备钛柱化剂,而是采用硫酸钛水解产物做交联剂对蒙脱土进行无机改性。从多步实验变为一步制得产物,降低其制作成本,提高了吸附材料的实用性。通过TG-DSC、IR和XRD分析对其结构进行表征,并将改性后的含钛蒙脱土用于废水中铜离子、亚甲基蓝的去除。考查了含钛蒙脱土的吸附性能和光催化性能。实验结果表明:(1)蒙脱土经硫酸钛改性后,层间距增大,但蒙脱土的层板结构并没有被破坏。(2)用于亚甲基蓝去除所制备含钛蒙脱土的最佳条件为:硫酸钛浓度为0.15mol/L,水解温度为70℃,钛土比为1.75mmol硫酸钛/g钠土,于60℃烘干。(3)含钛蒙脱土用于亚甲基蓝的去除,在蒙脱土用量为0.07g/50mL亚甲基蓝溶液;亚甲基蓝的浓度为300mg/L,紫外光照为1小时的条件下,去除率可以达到99.91%。(4)用于铜离子去除所制备含钛蒙脱土的最佳条件为:硫酸钛浓度为0.15mol/L,水解温度为70℃,钛土比为1.75mmol硫酸钛/g钠土,于60℃烘干后在150℃下烧制2h。(5)含钛蒙脱土用于废水中铜离子的去除,当土用量为0.4g/50mL铜液、铜离子的浓度为10mg/L、吸附时间是1小时,吸附率可以达到93.59%。
[Abstract]:In chemical enterprises, there is a saying: "Water is the blood of industry." therefore, water is an indispensable material for modern chemical enterprises. In recent years, the discharge of industrial waste liquor has become one of the main sources of environmental water pollution. For example, the wastewater discharged from paper mills, dye factories, electroplating plants and so on contains a large number of harmful heavy metal ions and organic substances, which can harm aquatic organisms. The application and development of a new type of low-cost adsorption material is the most important in the treatment of wastewater containing heavy metals. Modified montmorillonite has the advantages of simple operation and high adsorption efficiency. It is a green and efficient adsorbent with wide application prospect. The innovation of this paper is that the traditional sol-gel method is not used to prepare titanium column agent. Instead, the inorganic modification of montmorillonite was carried out by using titanium sulfate hydrolysate as crosslinking agent. The product was prepared from multi-step experiment to one-step production, which reduced the production cost and improved the practicability of adsorption material. The structure of montmorillonite was characterized by TG-DSCIR and XRD analysis, and the structure of montmorillonite was characterized by TG-DSCIR and XRD. The modified titanium-containing montmorillonite was used to remove copper ion and methylene blue in wastewater. The adsorption and photocatalytic properties of Ti-containing montmorillonite were investigated. The experimental results showed that the interlayer spacing of montmorillonite was increased after modification with titanium sulfate. However, the laminate structure of montmorillonite was not destroyed. 2) the optimum conditions for removal of titanium montmorillonite by methylene blue were as follows: titanium sulfate concentration was 0.15 mol / L, hydrolysis temperature was 70 鈩，

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