微污染水中苯酚的去除研究

发布时间：2018-04-30 06:58

本文选题：微污染水 + 苯酚　；参考：《山东建筑大学》2017年硕士论文

【摘要】：微污染水中的有机污染物,特别是饮用水中的有机污染物已经严重影响到了人们的饮水安全。有机污染物的去除已成为当前水处理领域亟待解决的问题。常规的水处理技术(如絮凝-沉淀-过滤-消毒)不能彻底去除有机污染物,有时还会产生二次污染。本文研究了利用高级氧化技术过氧化氢、超声波(US)、芬顿试剂及其组合技术去除微污染水中的苯酚。1.不同氧化技术处理含苯酚水样的实验表明:用纯净水配制苯酚水样,室温下,单独使用30%过氧化氢,投加量1 mL/L,反应时间90 min,处理1 mg/L的苯酚水样时,降解率最高仅达到33.5%;单独使用超声处理苯酚水样,功率为60%,反应时间为60 min时,苯酚与COD的降解率均达到最高,分别达到7.60%、25.3%;过氧化氢与超声联用处理苯酚水样,苯酚的降解率可提高到39.02%;单独使用过氧化氢、超声或二者联用来处理含酚水样,效果均不理想。而芬顿试剂对苯酚水样的降解效果较好,本文主要研究了苯酚水样初始浓度、Fe2+与过氧化氢的最佳配比及处理时间对降解率的影响。对于不同浓度的含苯酚水样,最佳Fe2+与过氧化氢的配比也不同。对不同浓度苯酚对芬顿试剂降解率的影响做了动力学研究,其符合一级动力学。2.芬顿试剂与活性炭联用技术处理苯酚水样实验结果表明:用南水北调水、黄河水等配制苯酚水样,单独芬顿试剂法进行处理,由于干扰离子的影响,降解效果最高仅为26.4%,难以达到水质标准,因此引入活性炭与芬顿试剂联合处理苯酚水样,处理效果好,降解率可达96.5%。在对水样的处理过程中,苯酚的处理时间、芬顿试剂与活性炭投加顺序、不同水样等因素都会对处理效果产生影响。3.用高效液相色谱分析法分析了芬顿试剂降解苯酚的中间产物并对其反应机理进行了初步研究。
[Abstract]:Organic pollutants in micro-polluted water, especially in drinking water, have seriously affected people's drinking water safety. The removal of organic pollutants has become an urgent problem in the field of water treatment. Conventional water treatment techniques (such as flocculation-precipitation-filtration-disinfection) do not completely remove organic pollutants and sometimes produce secondary pollution. In this paper, the removal of phenol from micro-polluted water by advanced oxidation techniques, such as hydrogen peroxide, ultrasonic USU, Fenton reagent and its combination technology, was studied. The results of different oxidation techniques showed that the phenol water sample was prepared with pure water, 30% hydrogen peroxide was used only at room temperature, the dosage was 1 mL / L, the reaction time was 90 minutes, and the phenol water sample of 1 mg/L was treated. The degradation rate of phenol and COD reached the highest when ultrasonic treatment of phenol water sample was 60 min and reaction time was 60 min, and the degradation rate of phenol and COD reached 7.60% and 25.3%, respectively, and hydrogen peroxide combined with ultrasound was used to treat phenol water sample. The degradation rate of phenol can be increased to 39.02, and the effect of hydrogen peroxide alone, ultrasound or the combination of the two to treat phenol-containing water samples is not satisfactory. The effect of Fenton reagent on the degradation of phenol water sample was better. The optimum ratio of Fe2 and hydrogen peroxide and the effect of treatment time on the degradation rate of phenol water sample were studied in this paper. The optimum ratio of Fe2 and hydrogen peroxide is different for different concentrations of phenol water samples. The effect of phenol at different concentrations on the degradation rate of Fenton reagent was studied. Fenton reagent and activated carbon were used to treat phenol water sample. The results showed that the phenol water sample was prepared with South-to-North water transfer and Yellow River water, and was treated by Fenton reagent alone because of the interference of ions. The highest degradation effect is only 26.4, which is difficult to reach the standard of water quality. Therefore, the treatment of phenol water sample with activated carbon and Fenton reagent has good effect, and the degradation rate can reach 96.5. In the treatment of water samples, the treatment time of phenol, the addition order of Fenton reagent and activated carbon, and different water samples will affect the treatment effect. The intermediate product of phenol degradation by Fenton reagent was analyzed by HPLC and its reaction mechanism was studied.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X52

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