无机盐类染整助剂对类Fenton体系处理印染废水的影响

Effect of Inorganic Salt Dyeing and Finishing Auxiliaries on the Treatment of Printing and Dyeing Wastewater by Fenton-like System

目的研究常见的无机盐类染整助剂,对Fe3O4-MnO2-PAC-H2O2类Fenton体系,处理以亚甲基蓝为主要成分的模拟印染废水的影响.方法制备Fe3O4-MnO2复合材料并将其负载到PAC表面,使其与H2O2组成类Fenton体系;以亚甲基蓝为主要原料制模拟印染废水,向其内投加定量的NaCl、Na 2CO 3、Na 2S和Na2SO4等无机盐染类整助剂,经类Fenton体系处理后测其COD及亚甲基蓝的质量浓度的变化.结果废水中Cl^-、CO3^2-、S^2-3种离子的存在会抑制该类Fenton体系对亚甲基蓝印染废水的处理效果;废水中SO4^2-的存在对该类Fenton体系处理亚甲基蓝印染废水没有显著的影响.结论NaCl、Na2CO3和Na2S对类Fenton体处理印染废水有抑制作用,且抑制作用的效果Na2S>NaCl>Na2CO3,在实际处理时应先减少其存在;废水中Na2SO4的存在对类Fenton体系处理印染废水几乎没有抑制作用,在实际处理时即使存在也影响不大.

To study the effects of inorganic salt dyeing and finishing auxiliaries on the dyeing wastewater treatment by Fe3O4-MnO2-PAC-H2O2 Fenton system,the Fe3O4-MnO2 composites were prepared and loaded onto the surface of PAC.Methylene blue as the main raw material,and quantitative inorganic dyes such as NaCl,Na2CO3,Na2S and Na2SO4 as dyeing and finishing auxiliaries are used to simulate printing and dyeing wastewater,which are treated by Fenton-like system.After treatment the mass concentrations of COD and methylene blue were measured.The results show that the treatment of methylene blue printing and dyeing wastewater by this Fenton system is inhibited by the presence of Cl^-,CO3^2-,S2^-in wastewater.And the presence of SO4^2-in wastewater has no significant effect on the methylene blue printing and dyeing wastewater.NaCl,Na2CO3 and Na2S can inhibit the dyeing wastewater treatment by Fenton-like system,and the inhibitory effect is Na2S>NaCl>Na2CO3.The Na2SO4 in wastewater almost has no inhibition on the printing and dyeing wastewater treatment by the Fenton-like system.