活性炭负载二氧化钛去除水中锑（Sb）的研究

发布时间：2018-01-07 13:19

本文关键词：活性炭负载二氧化钛去除水中锑（Sb）的研究　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：我国是世界上储锑大国,并且近几年锑污染有愈演愈烈的趋势,研究发现,锑是重金属离子中较难去除的离子之一,而且锑污染会对人体的健康产生巨大的危害。以往的研究主要针对含锑的废水进行分析,对微污染水源中锑的去除的报道少之又少。一方面吸附法作为去除锑最常用的方法之一;另一方面活性炭作为应用最广泛且有效的吸附材料;所以本课题以活性炭负载纳米二氧化钛作为吸附材料对微污染水源水中锑进行去除效果的分析研究,探讨活性炭负载纳米二氧化钛去除微污染水源水中锑的吸附性能和作用机理。具体实验内容如下:(1)颗粒活性炭和粉末活性炭对微污染水源水中锑的去除的对比研究。然后进行活性炭负载纳米二氧化钛。实验得出,粉末活性炭比颗粒活性炭作为负载物效果更好。进行粉末活性炭负载纳米二氧化钛的最佳负载量为0.1g。(2)活性炭负载纳米二氧化钛静态实验的最佳影响因素的探究包括投加量、pH、温度、震荡时间以及竞争离子(Cl~-、NO_3~-、Ca~(2+)、Mg~(2+))。实验得出,最佳投加量为2.0g;最佳pH为8;最佳温度为20℃;最佳震荡时间为150min;竞争离子(Cl~-、NO_3~-、Ca~(2+)、Mg~(2+))对除锑的效果几乎没有影响。(3)活性炭负载纳米二氧化钛动态实验的最佳影响因素的探究包括流量和滤层厚度。实验得出,最佳流量为6ml/min;最佳滤层厚度为0.4m。(4)对活性炭负载纳米二氧化钛进行解吸以及再生实验,研究其实际的应用价值。实验得出解吸最大的解吸率为95.07%,解吸效果良好;进行再生实验得到其吸附效率也是达到95.07%,再生实验结果良好。(5)对活性炭负载纳米二氧化钛机理研究,包括负载后的外观分析、官能团变化、SEM分析、XRD分析以及FTIR分析。实验得出,负载前后官能团明显增多,是其吸附的主要机理。
[Abstract]:China is the largest country in the world and the storage of antimony, antimony pollution in recent years has intensified the trend, the study found that heavy metal ions in antimony is difficult to remove one of the ions, and antimony pollution brings great harm to human health. The previous research mainly for wastewater containing antimony analysis on micro polluted water the removal of antimony in the reported less. On the one hand the adsorption is the most commonly used method of removing antimony; on the other hand, activated carbon adsorption material as the most widely used and effective; so this paper using activated carbon supported nano titanium dioxide as the adsorption material of antimony was studied the removal of micro polluted source water the effect of activated carbon supported nano titanium dioxide, adsorption performance and mechanism of micro polluted source water of antimony. Specific contents are as follows: (1) the granular activated carbon and activated carbon on micro polluted water source Comparative study on the removal of antimony in water. Then the activated carbon supported TiO2. The results showed that the activated carbon powder as the load is better than granular activated carbon. The optimal loading of TiO2 supported on activated carbon powder was 0.1g. (2) the best effect of static experiment of nanometer titanium dioxide loaded activated carbon factors including the addition of inquiry the amount, pH, temperature, shaking time and competitive ion (Cl~-, NO_3~-, Ca~ (2+), Mg~ (2+)). The results showed that the optimum dosage of 2.0g; the optimum pH is 8; the optimum temperature is 20 DEG C; the best shock time is 150min; (Cl~-, NO_3~-, competing ions Ca~ (2+), Mg~ (2+)) has almost no effect on antimony removal effect. (3) the best effect of nano titanium dioxide dynamic load activated carbon flow and explore the factors including the thickness of the filter layer. The results showed that the optimum flow rate is 6ml/min; the optimal thickness of the filter layer is 0.4m. (4) on activated carbon Desorption and regeneration of nano TiO2, study its actual application value. The maximum desorption desorption rate was 95.07%, the desorption effect is good; regeneration experiment the adsorption efficiency reached 95.07%, the regeneration results is good. (5) study on load mechanism of nano titanium dioxide active carbon, including load after the appearance of analysis of functional groups, SEM analysis, XRD analysis and FTIR analysis. The results showed that the load before and after functional groups increased significantly, is the main mechanism of the adsorption.

【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU991.2

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