【作者】 林香凤；

【导师】 陈孟林；

【作者基本信息】 广西师范大学 ， 应用化学， 2006， 硕士

【摘要】 本文综述了吸附法处理染料废水和吸附剂再生方法的研究进展。对氧化法和催化氧化法再生大孔树脂进行了研究。主要的研究内容和得到的结论如下:1.分别选取五种染料为模拟污染物,测定了它们的最大吸收波长,作出了浓度-吸光度(A-C)曲线方程,针对染料的性质,以大孔树脂为对象对吸附剂进行了筛选。实验结果发现,D301树脂对活性艳橙X-GN、活性翠蓝K-GL、酸性铬深兰,D81对孔雀石绿及NKA-Ⅱ对硫酸耐尔蓝有较理想的吸附效果。2.考察了染料溶液的pH值对树脂平衡吸附量的影响。结果表明,pH值对D301吸附活性翠蓝K-GL和酸性铬深兰的影响较大,而对D301吸附活性艳橙X-GN和NKA-Ⅱ吸附硫酸耐尔蓝及D81吸附孔雀石绿影响相对较小。3.以D301吸附活性艳橙X-GN为例,考察了动态吸附的流速对出水水质的影响,实验结果表明流速以小于4 BV/h为好。4.对D301吸附活性艳橙X-GN的吸附热力学和动力学特征作了研究分析。结果表明:(1)D301吸附活性艳橙X-GN是一个吸热的物理吸附,在平衡吸附量为150、200、250mg/g时相对应的等量吸附焓变分别为:?H=65.61、62.72、60.44 kJ/mol,吸附速率常数k=0.07918 h-1。(2)Langmuir吸附等温方程和Freundlich吸附等温方程均可用于吸附过程数据的拟合,但Langmuir吸附等温方程式拟合的线性相关性更好。5.对所选的五种染料进行了再生氧化剂和催化剂的筛选。实验结果表明:(1)Fenton试剂对所选的五种模拟染料均有较好的色度去除效果,但是由于Fenton试剂反应过程中生成絮凝状物质,所以不宜作再生氧化剂;(2)次氯酸钠对活性艳橙X-GN、活性翠蓝K-GL、酸性铬深兰溶液,过氧乙酸对孔雀石绿溶液均有较好的脱色效果,可作为相对应染料的氧化再生剂;(3)V2O5-H2O2对硫酸耐尔蓝溶液及混合稀土-H2O2对活性艳橙X-GN溶液也有理想的脱色效果,它们可分别作为相对应染料的催化氧化再生剂。6.对次氯酸钠氧化再生吸附了活性艳橙X-GN、活性翠蓝K-GL、酸性铬深兰的D301树脂进行了研究。结果表明:(1)树脂再生率随再生液浓度、再生时间的增加而提高,随pH值的增加呈先增后降的变化规律,随再生温度的升高而下降(但吸附质为酸性铬深兰时例外);(2)综合考虑影响再生率的因素及影响规律,可确定适宜的再生条件为:对吸附了活性艳橙X-GN的D301 ,次氯酸钠的浓度为1.313 g/L(有效氯浓度)、pH值为5、常温、再生时间10 min,在该条件下再生率可达85%以上。吸附了活性翠蓝K-GL和酸性铬深兰更多还原

【Abstract】 The development on the dyes wastewater treatment by the method of adsorption and the regeneration of adsorbent are reviewed in this dissertation. The regeneration of macroporous resin by the methods of oxidation and catalytic oxidation was studied, and the results are summarized and presented as follow:1. Five kinds of dyes were selected as simulating pollutant, their maximal wavelength of the adsorption was determined, and their concentration-absorbency (A-C) curve equation was worked out. As adsorbent, the resin was selected to treat with dye wastewater according to the characters of the dyes.The results show that the resin D301 is able to adsorb reactive brilliant orange X-GN, reactive emerald green blue K-GL and acid chrome dark blue effectively. Both D81 and NKA-Ⅱresin are able to adsorb malachite green and nile blue sulphate effectively respectively.2. The effects of dyes solution’s pH value on the adsorption equilibrium were researched. The influences of pH value on the adsorption equilibrium of reactive emerald green blue K-GL and acid chrome dark blue are notable, but it is small relatively on the adsorption of reactive brilliant orange X-GN on D301, nile blue sulphate on NKA-Ⅱ, malachite green on D81.3. The effect of flow rate on effluent quality was studied, and the result shows that the flow rate should be less than 4BV/h when D301 adsorbed reactive brilliant orange X-GN.4. The thermodynamical and kinetic propertys of the adsorption of reactive brilliant orange X-GN on D301 were studied. The results are as follows: first, the adsorption of reactive brilliant orange X-GN on D301 is endothermic, its enthalpy change is 16.15 kJ/mol, the adsorption rate constant is 0.07918 h-1; secondly, The equilibrium data are well described by Langmuir equation and Freundlich equation. But Langmuir equation has a better relativity.5. Several kinds of oxidants or catalysts were chosed as regeneration oxidants and catalysts to treat with the selected dye wastewater. The results are as follows: first, five kinds of simulating dyes are decolorized effectively by Fenton reagent, but Fenton reagent is not suitable for regeneration because of the creation of flocculent matter; secondly, sodium hypochlorite also has the same effect on these dyes solutions except malachite green, but peracetic acid has a good更多还原