本文選題：1　切入點(diǎn)：5-萘二磺酸　出處：《河南大學(xué)》2015年碩士論文

【摘要】：萘磺酸類化合物是一種重要的化工原料,在染料、醫(yī)藥、農(nóng)業(yè)、建筑等行業(yè)廣泛應(yīng)用,這類化合物在生產(chǎn)與使用過程中,會產(chǎn)生大量的工業(yè)廢水,這類廢水具有水溶性大、極性強(qiáng)、可生化性差、毒性高、致癌等特點(diǎn),如果將其直接排放到水體,將會對水環(huán)境和人類健康造成嚴(yán)重威脅。因此,萘磺酸類化合物染料及染料中間體廢水的處理研究受到國內(nèi)外學(xué)者的廣泛關(guān)注。本文以1,5-萘二磺酸模擬廢水為實(shí)驗(yàn)對象,分別采用臭氧氧化、芬頓試劑氧化法對其進(jìn)行處理研究,結(jié)果如下：(1)臭氧氧化法處理1,5-萘二磺酸模擬廢水。首先分別考察了溶液初始濃度、臭氧投加量、反應(yīng)溫度、溶液初始pH值等因素對溶液COD去除率的影響。實(shí)驗(yàn)結(jié)果表明,臭氧氧化1,5-萘二磺酸適宜的條件為：初始濃度為1 mmol/L、臭氧投加量為4.21×10-6 mol/s、反應(yīng)溫度2512、溶液pH為11.0,在多孔砂芯分布板的均勻分布下,反應(yīng)120 min后,其COD去除率可達(dá)90%以上；其次,選擇了一些常見的有代表性的無機(jī)離子,研究了這些離子對溶液COD去除率的影響,結(jié)果表明,Na+、Ca2+、Mg2+、Cl-、HCO3-、N03對臭氧氧化無干擾作用,Fe2+對臭氧氧化有促進(jìn)的作用,SO42-對臭氧氧化有抑制的作用；此外,臭氧氧化法處理1,5-萘二磺酸機(jī)理初步探討表明：羥基自由基抑制劑叔丁醇對臭氧氧化1,5-萘二磺酸有明顯的抑制作用,臭氧氧化1,5-萘二磺酸主要是羥基自由基間接機(jī)理；此外,還通過紫外可見光譜、紅外吸收光譜變化、COD、TOC的變化,可以判定臭氧氧化1,5-萘二磺酸的過程中生成了小分子物質(zhì),反應(yīng)最終礦化為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)芬頓試劑催化氧化處理1,5-萘二磺酸模擬廢水。首先分別考察了H202投加量、Fe2+投加量、反應(yīng)溫度、溶液初始pH等因素對溶液COD去除率的影響,實(shí)驗(yàn)結(jié)果表明：1,5-萘二磺酸初始濃度3mmol/L、控制反應(yīng)溫度25～35℃、溶液pH值在3.0～5.0范圍內(nèi),H202的濃度為55.80 mmol/L,Fe2+的投加量為2.790 mmol/L(此時,H2O2:Fe2+的摩爾比20：1),反應(yīng)30 min后,COD去除率可達(dá)79%左右；其次,選擇了一些常見的有代表性的無機(jī)離子,研究了這些離子溶液對COD去除率的影響,這些離子的存在對Fenton試劑的催化氧化性能有不同程度的作用,其促進(jìn)能力的大小為：Fe3+ Cu2+,其抑制能力的大小為：SO42-Cl-F-H2PO4-,而Na+、NO3對芬頓試劑催化氧化反應(yīng)影響不大。此外,對芬頓試劑催化氧化1,5-萘二磺酸的機(jī)理進(jìn)行了初步探討,結(jié)果表明,叔丁醇的加入對芬頓試劑催化氧化1,5-萘二磺酸的降解有明顯的抑制作用,芬頓試劑催化氧化1,5-萘二磺酸主要是羥基自由基機(jī)理,并通過紫外、COD、TOC的變化可初步判定芬頓試劑催化氧化1,5-萘二磺酸的過程中生產(chǎn)了小分子物質(zhì),反應(yīng)最終礦化為CO2和H2O；芬頓試劑催化氧化后溶液的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，

本文編號：1665768