芬顿试剂降解有机物的机理研究资料.doc

类芬顿试剂降解有机物的机理研究 摘 要 芬顿法是一种高级的氧化技术，具有较高的去除难降解有机污染物的能力，但芬顿氧化法具有明显的局限性。本文以钴离子为催化剂，用过一硫酸盐代替Fenton试剂中的过氧化氢进行研究。钴/过一硫酸氢盐(Co/PMS)是一种克服了Fenton技术的诸多缺陷而基于类Fenton思路(过氧化物+过渡金属)的高级氧化技术（AOTs）。该体系具有Co用量少(μg /L 数量级)，产生的SO4 -氧化还原电位高，能够在广泛的pH 范围(2—9) 降解有机污染物，反应后不产生污泥等优点，在环境污染治理领域具有广阔的应用前景。本文从改变PMS的用量、Co的用量、温度、有机染料用量四个方面分析了Co /PMS 体系降解水中有机污染物的机理，并在此基础上进行了四因素三水平正交实验进一步探讨各因素的最优条件，同时国内外研究进展，并就存在的问题提出了展望。 关键词：过一硫酸氢钾，钴催化，自由基，有机污染物，降解，高级氧化技术 Fentons reagent mechanism of degradation of organic contaminants ABSTRACT Fenton method is an advanced oxidation technology, has the high remove the ability for the difficult degradable organic pollutants, but fenton oxidation method has obvious limitations. In this paper, cobalt ions as catalyst, Fenton reagent used in place of a sulfate of hydrogen peroxide were studied. The Cobalt / peroxymonosulfate ( Co /PMS ) system is a recently emerging advanced oxidation technology, established on the idea of transition metal-mediated decomposition of peroxide to overcome the limitations of the Fentons reagent. It is gaining prominence, owing to some excellent properties such as high decontamination efficiency with low concentration of cobalt (μg/L levels ) , ability to produce sulfate radical(SO4－) and wide pH range(2—9)flexibility. They could easily degrade the complex organic contaminants into small molecules or even deeply mineralize them into CO2 and H2O, besides almost does not produce any sludge after the reaction under mild temperature and pressure conditions. All of these make it a promising alternative in pollution remediation. This paper change the PMS, the dosage of Co dosage, temperature, dosage of organic dye Co/PMS system four aspects analyzes the mechanism of degradation of organic pollutants in water, and on the basis of three square four factors orthogonal experiment to do further discussion, at the same time is the degradation of organic pollutants in water research progress both at home and abroad, are put forward the problems e