摘要
研究了化学氧化法和化学混凝法处理染料废水的脱色效果，考查了氧化剂及混凝剂种类、投加量和ｐＨ值对脱色效果的影响。结果发现，光激发产生的复合氧化气体较纯ＣｌＯ２具有更好的脱色效果，且二者对活性染料废水的脱色效果优于对分散染料废水的脱色效果，都是在ｐＨ＜１０的条件下取得良好的脱色效果；化学混凝法对分散染料废水的脱色效果优于对活性染料废水的脱色效果，ＭｇＣｌ２·６Ｈ２Ｏ的脱色效果最好，ＰＡＣ次之，Ａｌ２（ＳＯ４）３·１８Ｈ２Ｏ最差；ｐＨ值对ＭｇＣｌ２·６Ｈ２Ｏ的脱色效果影响较大，在ｐＨ≥１２的条件下，ＭｇＣｌ２·６Ｈ２Ｏ的脱色效果达最佳。
The effectiveness of color removal for wastewater containing dye by means of chemical oxidation and coagulation has been studied. The effect of oxidants, dosage and pH value on color removal efficiency was investigated, The experimental results show that the mixture of oxidation gases, containing ClO 2,Cl 2,H 2O 2 and O 3 etc., prepared by LC-10A type UV-O 3 chloride dioxide complex disinfector generator, gave better color removal effect than pure ClO 2 prepared by chemical method. The color removal capability of chemical oxidation for reactive dye was superior to that for dispersed dye. The chemical oxidation produced good color removal ratio when the pH value of the solution is less than 10. By means of coagulation, the efficiency of decolorization for dispersed dye was better than that for reactive dye. MgCl 2·6H 2O was shown to be superior to PAC and Al 2(SO 4) 3·18H 2O in color removal for the wastewater. MgCl 2·6H 2O produced excellent decolorization effect in basic aqueous medium (pH≥12.0).
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
1999年第1期5-9,共5页
Research of Environmental Sciences
关键词
化学氧化法
化学混凝法
染料
脱色
废水处理
Chemical oxidation
Coagulation
Dye containing wastewater
Color removal
