臭氧法和芬顿试剂氧化法处理1，5-萘二磺酸废水的研究

发布时间：2018-03-26 01:40

  本文选题：1　切入点：5-萘二磺酸　出处：《河南大学》2015年硕士论文

【摘要】：萘磺酸类化合物是一种重要的化工原料,在染料、医药、农业、建筑等行业广泛应用,这类化合物在生产与使用过程中,会产生大量的工业废水,这类废水具有水溶性大、极性强、可生化性差、毒性高、致癌等特点,如果将其直接排放到水体,将会对水环境和人类健康造成严重威胁。因此,萘磺酸类化合物染料及染料中间体废水的处理研究受到国内外学者的广泛关注。本文以1,5-萘二磺酸模拟废水为实验对象,分别采用臭氧氧化、芬顿试剂氧化法对其进行处理研究,结果如下：(1)臭氧氧化法处理1,5-萘二磺酸模拟废水。首先分别考察了溶液初始浓度、臭氧投加量、反应温度、溶液初始pH值等因素对溶液COD去除率的影响。实验结果表明,臭氧氧化1,5-萘二磺酸适宜的条件为：初始浓度为1 mmol/L、臭氧投加量为4.21×10-6 mol/s、反应温度2512、溶液pH为11.0,在多孔砂芯分布板的均匀分布下,反应120 min后,其COD去除率可达90%以上；其次,选择了一些常见的有代表性的无机离子,研究了这些离子对溶液COD去除率的影响,结果表明,Na+、Ca2+、Mg2+、Cl-、HCO3-、N03对臭氧氧化无干扰作用,Fe2+对臭氧氧化有促进的作用,SO42-对臭氧氧化有抑制的作用；此外,臭氧氧化法处理1,5-萘二磺酸机理初步探讨表明：羟基自由基抑制剂叔丁醇对臭氧氧化1,5-萘二磺酸有明显的抑制作用,臭氧氧化1,5-萘二磺酸主要是羟基自由基间接机理；此外,还通过紫外可见光谱、红外吸收光谱变化、COD、TOC的变化,可以判定臭氧氧化1,5-萘二磺酸的过程中生成了小分子物质,反应最终矿化为CO2和H20；臭氧氧化后溶液的BOD5/COD值由降解前的小于0.1提高到0.40。(2)芬顿试剂催化氧化处理1,5-萘二磺酸模拟废水。首先分别考察了H202投加量、Fe2+投加量、反应温度、溶液初始pH等因素对溶液COD去除率的影响,实验结果表明：1,5-萘二磺酸初始浓度3mmol/L、控制反应温度25～35℃、溶液pH值在3.0～5.0范围内,H202的浓度为55.80 mmol/L,Fe2+的投加量为2.790 mmol/L(此时,H2O2:Fe2+的摩尔比20：1),反应30 min后,COD去除率可达79%左右；其次,选择了一些常见的有代表性的无机离子,研究了这些离子溶液对COD去除率的影响,这些离子的存在对Fenton试剂的催化氧化性能有不同程度的作用,其促进能力的大小为：Fe3+ Cu2+,其抑制能力的大小为：SO42-Cl-F-H2PO4-,而Na+、NO3对芬顿试剂催化氧化反应影响不大。此外,对芬顿试剂催化氧化1,5-萘二磺酸的机理进行了初步探讨,结果表明,叔丁醇的加入对芬顿试剂催化氧化1,5-萘二磺酸的降解有明显的抑制作用,芬顿试剂催化氧化1,5-萘二磺酸主要是羟基自由基机理,并通过紫外、COD、TOC的变化可初步判定芬顿试剂催化氧化1,5-萘二磺酸的过程中生产了小分子物质,反应最终矿化为CO2和H2O；芬顿试剂催化氧化后溶液的BOD5/COD值由降解前的小于0.1提高到0.35。
[Abstract]:Naphthalenesulfonic acid is an important chemical raw material, widely used in dye, medicine, agriculture, construction and other industries. In the production and use of these compounds, a large number of industrial wastewater will be produced. Strong polarity, poor biodegradability, high toxicity, carcinogenic and other characteristics, if it is discharged directly into the water body, it will pose a serious threat to the water environment and human health. The treatment of naphthalenesulfonic acid dyes and dye intermediates wastewater has received extensive attention from domestic and foreign scholars. In this paper, the simulated wastewater of 1 Naphthalene disulfonic acid was used as the experimental object, and ozone oxidation was used respectively. Fenton reagent oxidation method was used to treat the wastewater. The results were as follows: 1: 1) ozonation method was used to treat the simulated wastewater of 1 Naphthalene disulfonic acid. Firstly, the initial concentration of the solution, the dosage of ozone and the reaction temperature were investigated, respectively. The effect of the initial pH value of solution on the removal rate of COD in the solution was studied. The optimum conditions for ozonation of 1 mmol-naphthalene disulfonic acid are as follows: initial concentration is 1 mmol / L, ozone dosage is 4.21 脳 10-6 mol / s, reaction temperature is 2512, solution pH is 11.0. Under the uniform distribution of porous sand core, the COD removal rate can reach more than 90% after 120 min reaction. Some typical inorganic ions were selected to study the effect of these ions on the removal rate of COD in solution. The results show that there is no interference effect on ozone oxidation by Na Na Ca 2 + Ca 2 + mg 2 or Cl-C CO 3-N 03; Fe 2 can promote ozone oxidation; so 4 2-can inhibit ozone oxidation, in addition, the effect of Fe 2 on ozone oxidation can be inhibited. A preliminary study on the mechanism of ozone oxidation treatment of 1o 5-naphthalene disulfonic acid shows that the hydroxyl radical inhibitor, tert-butanol, has obvious inhibitory effect on ozone oxidation of 1o 5-naphthalene disulfonic acid, and the ozone oxidation of 1o 5-naphthalene disulfonic acid is mainly an indirect mechanism of hydroxyl radical. By UV-Vis spectra and infrared absorption spectra, the change of TOC can be used to determine the formation of small molecules in the process of ozone oxidation of 1o 5-naphthalene disulfonic acid. The final mineralization of the reaction was CO2 and H20, and the BOD5/COD value of the solution after ozonation was increased from less than 0.1 before degradation to 0.40.2Fenton reagent) Fenton reagent was used to catalyze the treatment of the simulated waste water containing 1naphthalene disulfonic acid. Firstly, the dosages of H202 and Fe2 were investigated, respectively, and the reaction temperature was also investigated. The effect of initial pH and other factors on the removal rate of COD in the solution was studied. The experimental results showed that the initial concentration of 1: 1 and 5-naphthalene disulfonic acid was 3 mmol / L, and the reaction temperature was 2535 鈩，

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