本文關(guān)鍵詞： 催化濕式過氧化氫氧化 堿式硫酸銅 苯酚廢水　出處：《東南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：苯酚和酚類化合物是一類廣泛應(yīng)用于石化單元、制藥、煉油廠和染料、塑料行業(yè)的化工原料,所以工業(yè)廢水中不可避免地含有這些化合物。由于含酚廢水對人類健康和水生生物具有極大的危害,所以含酚廢水在直接排放前必須經(jīng)過處理。處理含酚廢水的方法有很多,但生物法只對低濃度廢水有效或者需要較長的處理時間,這是因為苯酚是-種抗生物降解和高毒化合物。一些如吸附、膜過濾等物理方法適合處理高濃度廢水,而化學(xué)方法中的催化濕式過氧化氫氧化法適合處理常見的中等濃度廢水。該方法在溫和的條件下最終能將有機物降解為水、二氧化碳和一些小分子產(chǎn)物,是廢水處理的最常用方法,尤其是對難降解污染物。但是催化濕式過氧化氫氧化法中常用的Fenton催化劑只適合在pH=3.5左右處理廢水。其他一些含銅催化劑催化效果不是特別理想或者是處理后的廢水中銅離子含量過高,造成二次污染。堿式銅鹽降解有機物取得了良好的效果,且堿式鹽的制備方法簡單,穩(wěn)定性好,降解有機物條件溫和,效果好�；谶@樣的認識,本文以非均相催化濕式過氧化氫氧化法和堿式硫酸銅為催化劑處理含酚廢水。以自行配制的苯酚廢水為研究對象,考察了溫度、雙氧水用量、初始pH和催化劑用量對催化氧化處理苯酚廢水效果的影響。結(jié)果表明：在50℃、常壓、自然pH值(6.88)的最佳條件下,使用0.13g/LCu4(OH)6SO4-A,2.5倍理論量的H2O2,降解150mL100mg/L的苯酚廢水,苯酚去除率在10 min時就能達到99%,180 min的時候COD去除率能達到97%。本文采用三種不同的水熱法合成不同孔徑的堿式硫酸銅：水膽礬Cu4(OH)6SO4-A, Cu4(OH)6SO4-B和塊銅礬Cu3(OH)4S04。在相同條件下,分別用三種催化劑處理苯酚、甲基橙和酸性橙Ⅱ廢水,并對催化劑的結(jié)構(gòu)進行表征分析,從而解析該催化劑的構(gòu)效關(guān)系。研究結(jié)果表明,堿式硫酸銅催化劑雖然比表面積較小,但孔徑較大,且都大于有機物分子尺寸大小,減小了有機物向催化活性位擴散的擴散阻力,雙氧水產(chǎn)生的羥基自由基能夠有效快速氧化有機物；有機物分子尺寸越大時,三種催化劑的催化效果差異越大；孔徑越大,催化劑活性越好。通過離心將催化劑從處理后的廢水水中分離后用于回收測試。研究發(fā)現(xiàn),堿式硫酸銅能夠循環(huán)使用3次,在第三次使用中COD去除率雖然有所下降,但是仍然具有一定的催化效果。
[Abstract]:Phenol and phenolic compounds are a class of chemical raw materials that are widely used in petrochemical units, pharmaceuticals, refineries, dyestuffs and plastics. So it's inevitable that industrial wastewater contains these compounds. Because phenol wastewater is very harmful to human health and aquatic organisms, phenol wastewater must be treated before it can be discharged directly. There are many ways to treat phenol wastewater. But the biological process is only effective or takes a long time to treat low concentration wastewater, because phenol is a biodegradable and highly toxic compound. Some physical methods such as adsorption and membrane filtration are suitable for treating high concentration wastewater. The catalytic wet hydrogen peroxide oxidation process in the chemical method is suitable for the treatment of common medium concentration wastewater. Under mild conditions, organic matter can eventually be degraded into water, carbon dioxide and some small molecular products. Is the most commonly used method for wastewater treatment. Especially for refractory pollutants. But the Fenton catalysts commonly used in catalytic wet hydrogen peroxide oxidation are only suitable for treating wastewater around pH=3.5. Some other copper-containing catalysts are not ideal or after treatment. The content of copper ion in waste water is too high, The basic copper salt has achieved good results in the degradation of organic matter, and the preparation method of the basic salt is simple, the stability is good, the condition of degradation of organic matter is mild, and the effect is good. In this paper, phenol wastewater was treated with heterogeneous catalytic wet hydrogen peroxide oxidation method and basic copper sulfate as catalyst, the phenol wastewater prepared by ourselves was used as the research object, the temperature, the amount of hydrogen peroxide and the amount of hydrogen peroxide were investigated. The effect of initial pH and the amount of catalyst on the catalytic oxidation of phenol wastewater was studied. The results showed that under the optimum conditions of 50 鈩，

本文編號：1506708