芬顿试剂降解有机染料的试题.doc

芬顿试剂降解有机染料的研究 摘 要 钴催化过硫酸氢钾(Co/PMS)是一种类芬顿氧化技术，它克服了Fenton氧化技术的许多缺陷，是一种新兴的高级氧化技术。 本文采用钴催化过硫酸氢钾降解亚甲基蓝有机染料，分别研究了过硫酸氢钾、钴、亚甲基蓝的用量和反应温度四个变量对降解速率的影响，通过四因素三水平正交实验找出最佳实验条件。实验结果表明：1Co离子的催化性能较高，在很少量的情况下就可以完成对PMS 的催化；2产生的SO4－·氧化还原电位高，，能够在广泛的pH 范围( 2—9)内降解有机污染物，过硫酸氢钾的用量少，可以节约实验成本，并且由于其是固体，方便储存和运输反应后不产生污泥，对悬浮固体具有一定的去除效果，对染料水中的COD也一定的降解率，5在短时间（10min）和常温条件（20℃）下，其对亚甲基蓝染料水的脱色效率能达到90%以上，具有显著的实验效果。 这些优异的特性会随着环境污染治理的深入而得到更为广阔的发展，同时使该项技术的研究和应用具有更大的吸引力。当今社会水资源短缺问题尤为突出，充分的对染料废水进行降解是我们应当关注的环境问题，希望这项研究能够更广泛的运用在环境水污染治理方面。关键词：钴，催化，过硫酸氢钾，降解，亚甲基蓝，COD Fenton degradation of organic dyes ABSTRACT Cobalt catalyze potassium monopersulfate(Co/PMS) which is a kind of similar Fenton oxidation technology, and it overcomes a lot of defects of Fenton oxidation technology, which is a new sort of advanced oxidation technology. In summary, this paper using cobalt catalyze potassium hydrogen sulfate , which degrade methylene blue dye water. This test is research over the four elements: the amount of the potassium hydrogen sulfate, cobalt, initial methylene blue dye water and the reaction temperature on the degradation rate of the methylene blue dye water, and get through the four factors and three levels orthogonal experiment to find the best experimental conditions, the results show that： 1) the cobalt ions have a high catalytic performance, and in a very small amount of the cobalt ions can catalyze PMS very well, and producing a strong oxidizing SO4-·, 2) in this experiment can generate a strong oxidizing SO4-·, it can degrade organic pollutants in a wide pH range (2-9),3) in this experiment, it needs very little amount of the PMS, so it will save experiment prime cost and because it is a kind of solid, so it can easy storage and transport; 4) the reaction does not produce sludge, and it also can remove suspended solids in some effect; in the dye water, COD also play a role, through this experiment, this method can remove COD in some effect, too. 5) in a short period of time(10 minutes) and i