天然水体成分对海绵铁处理印染废水的影响研究

Study on the influences of natural water ingredients on dyeing wastewater treatment by sponge iron

研究了水体中天然有机质(NOM)及常见阴阳离子对磁性海绵铁超声降解染料酸性蓝9(AB9)的影响。结果表明:p H为5.0和9.0、NOM质量浓度低于40 mg/L时,随着NOM浓度增大,对AB9降解的抑制作用逐渐增强;用Na Cl模拟水溶液背景离子强度(IS)发现,IS对降解的影响可忽略不计;阴离子SO42-、NO3-、CO32-和PO43-对降解抑制强度排序为:PO43->CO32->SO42->NO3-,阳离子Ca2+、Mg2+、K+和Zn2+对降解效率有不同影响;NOM和硬度离子共存时,在一定浓度范围内降解率略有提高。

The influences of natural organic matter（NOM） and common anions and cations in water body on the ultra- sonic degradation of the dye Acidic Blue 9 （AB9） by magnetic sponge iron have been studied. The results show that when the pH are 5.0 and 9.0,and NOM mass concentration less than 40 mg/L,the inhibition effect on AB9 degradation increases gradually with the increase of NOM mass concentration. It is found that when NaCl is used for the simulation of background ionic strength （IS） in aqueous solution, the influence of IC on degradation can be ignored. The order of degradation inhibition strength affected by anions, such as SO2-, NO3-, CO3^2- and PO4^3- is PO4^3-〉CO3^2-〉 SO^2-〉NO3-. Cations, such as Ca^2＋, Mg^2＋, K^＋and Zn^2＋ have different influences on degradation efficiency. When NOM and hardness ions are coexisted, the degradation efficiency increases slightly within a certain range of concentrations.