摘    要 本文对次氯酸直接氧化分散大红染料废水做了研究，先确定分散大红的最大吸收波长为526nm。然后设定影响整个大红染料废水浓度的主要因素：反应的时间、酸碱性、原始染料浓度以及次氯酸的有效氯浓度。结果表明：浓度为200mg/L的分散大红溶液和有效氯为5。0%的次氯酸钠各10mL混合，实际分散大红的浓度是100mg/L,次氯酸钠的有效氯含量为2。5%，然后分别充分反应1,2,3,4,5小时，降解率随反应时间线性增加，染料降解率到5小时时接近40%，COD的去除率达到了40%以上，,经综合考虑，反应1小时最合适，因为一小时效果最为明显；浓度为200mg/L的分散大红溶液和有效氯为5。0%的次氯酸钠各10mL混合，则实际分散大红的浓度为100mg/L,次氯酸钠的有效氯含量为2。5%，然后分别在PH=4,5,6,7,8的条件下充分反应一个小时，在pH小于等于4时，染料降解率到了90%，COD去除率则到了51%，在PH大于6之后，去除率迅速下降，所以PH为4最为合适；将浓度为50mg/L、70mg/L、100mg/L、130mg/L、180mg/L的分散大红溶液10mL分别与有效氯为5。0%的次氯酸钠10mL混合，则实际分散大红溶液的初始浓度为25mg/L、35mg/L、50mg/L、65mg/L、90mg/L，次氯酸钠的有效氯含量为2。5%，充分反应60分钟，降解率随着大红染料废水的初始浓度的增大而降低，所以分散大红的浓度应该越低越好；初始浓度为200mg/L的分散大红溶液和有效氯分别为1。0%、2。0%、3。0%、4。0%、5。0%的次氯酸钠溶液各10mL混合，则实际分散大红的实际浓度为100mg/L,次氯酸钠的有效氯含量为0。5%、1。0%、1。5%、2。0%、2。5%，充分反应60分钟，去除率随着反应液中有效氯的浓度增加而增加，当有效氯为5。0%的次氯酸钠时,次氯酸钠的利用效率达最大值。90155

In this paper, the direct oxidation and dispersion of hypochlorous acid wastewater was studied。 The maximum absorption wavelength of disperse red was 526nm。 And then set the main factors that affect the concentration of the whole red dye wastewater: the reaction time, pH, the original dye concentration and the available chlorine concentration of hypochlorous acid。 The results showed that the concentration of 200mg / L dispersible red solution and available chlorine was 5。0% sodium hypochlorite 10mL mixed, the actual dispersion of red concentration is 100mg / L, sodium hypochlorite available chlorine content of 2。5%, and then fully respond to 1,2 , The degradation rate increased linearly with the reaction time, the degradation rate of the dye reached nearly 40% at 5 hours, and the removal rate of COD reached more than 40%。 After comprehensive consideration, the reaction was the most suitable for one hour, because one The effect of the hourly effect is most obvious; the concentration of 200mg / L dispersible red solution and available chlorine is 5。0% sodium hypochlorite 10mL mixed, the actual dispersion of red concentration of 100mg / L, sodium hypochlorite available chlorine content of 2。5%, and then in the PH = 4, 5, 6, 7, 8 under the conditions of full reaction for an hour, at pH less than or equal to 4, the dye degradation rate to 90%, COD removal rate to 51%, PH greater than 6, the removal rate decreased rapidly , So the pH is 4 most suitable; the concentration of 50mg / L, 70mg / L, 100mg / L, 130mg / L, 180mg / L dispersible red solution 10mL and available chlorine is 5。0% sodium hypochlorite 10mL mixed, the actual dispersion The initial concentration of red solution was 25mg / L, 35mg / L, 5 0mg / L, 65mg / L, 90mg / L, the available chlorine content of sodium hypochlorite is 2。5%, the reaction time is 60 minutes, the degradation rate decreases with the initial concentration of red dye wastewater, so the concentration of scattered red should be lower The actual concentration of the dispersed red was 100 mg / L, and the actual concentration of the reddish solution was 100 mg / L, and the actual concentration of the reddish solution was 100 mg / L , The available chlorine content of sodium hypochlorite is 0。5%, 1。0%, 1。5%, 2。0%, 2。5%, the reaction is fully reacted for 60 minutes, the removal rate increases with the concentration of available chlorine in the reaction solution, when the available chlorine is 5。0% , The utilization efficiency of sodium hypochlorite is maximized。