粉煤灰对造纸废水中污染物的吸附性能研究

Study on the Adsorption Property of Fly Ash Towards Pollutants in Papermaking Wastewater

关键词:  粉煤灰  造纸废水  吸附  污染物

Key Words:fly ash  papermaking wastewater  adsorption  pollutant

摘要:本研究通过热处理方法制备了粉煤灰无机材料（FAH），主要探讨了FAH的粒径、吸附时间和pH值对COD的去除和重金属竞争吸附的影响。结果表明，当FAH粒径<0.212 mm，吸附时间为240 min，pH值为8时，COD_Cr达到最大去除率，为92.6%；同时也对BOD、SS和色度展现了良好的去除效果。在pH值=6时，粒径<0.212 mm的FAH对Cu²⁺、Zn²⁺、Pb²⁺、Cd²⁺的去除率最高，分别为95.9%、85.3%、79.3和82.2%。因此，当FAH粒径<0.212 mm时，FAH对COD和Cd²⁺、Zn²⁺、Pb²⁺、Cu²⁺具有很好的去除效果。

Abstract:In this study， fly ash inorganic material （FAH） was prepared by heat treatment. The effects of different particle sizes， adsorption time and pH value on oxygen demand （COD） removal and competition adsorption with heavy metal ions were studied. The results showed when the particle size was less than 0.212 mm， the COD_Cr maximum removal rate was 92.6% at pH value=8 for 240 min. It also had good removal effect on BOD， SS and chroma. When pH value=6， FAH with particle size less than 0.212 mm had the highest removal rates of Cu²⁺， Zn²⁺， Pb²⁺， Cd²⁺ of 95.9%， 85.3%， 79.3 and 82.2%， respectively.When the particle size was less than 0.212 mm， FAH had a good removal effect on COD， Cd²⁺， Zn²⁺， Pb²⁺ and Cu²⁺.