添加表面活性剂的聚硅酸铝铁絮凝剂在重金属烟气废水处理中的应用

Application of Adding Surfactant Polysilicate Aluminum Ferric Flocculant in Heavy Metal Flue Wastewater Treatment

以硅酸钠、氯化铁、氯化铝为主要原料,分别添加3种不同表面活性剂(硬脂酸钠(SAS)、辛基酚聚氧乙烯醚(OP-10)、脂肪醇聚氧乙烯醚硫酸钠(AES))制备无机高分子聚硅酸铝铁絮凝剂,研究了表面活性剂种类及添加量对絮凝剂处理重金属烟气废水效果的影响。试验结果表明,硬脂酸钠型聚硅酸铝铁絮凝剂(SAS+PSAF)比其他两种絮凝剂(OP-10+PSAF、AES+PSAF)处理废水效果更佳,对烟气废水的CODCr去除率为52.1%,对Cd2+的去除率为80.5%。用红外光谱和扫描电镜对其絮凝剂产品进行了表征。

With Na2SiO3,FeCl3,AlCl3 as main raw materials,adding respectively three different surfactants（stearic acid sodium（SAS）,octylphenol polyoxyethylene ether（OP-10）,Sodium Alcohol Ether Sulphate（AES））,the inorganic polymeric polysilicate aluminum ferric flocculant is prepared.The effect of the surfactant species and additive amount of flocculant on removal of heavy metal flue gas wastewater is studied.Experiment shows that the product of PSAF by adding stearic acid sodium（SAS＋PSAF） for wastewater treatment is better than the product of PSAF by adding other surfactant（OP-10＋PSAF,AES＋PSAF）.The removal rate of CODCr in flue gas wastewater is 52.1% and the Cd2＋ is 80.4%.The products of PSAF are characterized by IR spectrum and SE.