焦化废水的粉煤灰吸附及Fenton法再生研究  

Adsorption Treatment of Coking Wastewater by Fly Ash and Fenton-driven Chemical Regeneration of Fly Ash

作　　者：任宁梅[1] 周集体[1] 项学敏[1] 王晓坤[2] 高珊[2] 

机构地区：[1]大连理工大学环境学院工业生态与环境工程教育部重点实验室,辽宁大连116024 [2]大连理工大学环境工程研究设计院有限公司,辽宁大连116024

出　　处：《辽宁化工》2011年第5期443-448,共6页Liaoning Chemical Industry

基　　金：长江学者和创新团队发展计划资助项目;项目号:IRT0813

摘　　要：粉煤灰可以用来对焦化废水进行深度处理,吸附去除其中的有机污染物。本文研究了粉煤灰对焦化废水中的有机污染物的吸附特性,并运用Fenton法对吸附了有机污染物的粉煤灰再生性能进行了研究。结果表明:在10～40℃之间,粉煤灰对COD的吸附约60 min即可达到吸附平衡,平衡吸附量随着温度的升高而下降,pH对吸附效果影响不大,吸附等温线符合Freundlich和Langmuir吸附模型,吸附动力学符合Lagergren一级吸附速率方程。Fenton法再生的效果显著。当Fe2+/H2O2=1︰3(摩尔比),H2O2/COD=2︰3(质量比),温度30℃,pH为5,Fenton氧化时间10 min,粉煤灰的再生率可达136%。Fly ash was used to remove organic pollutants by adsorption in advanced treatment of coking wastewater.In this paper,adsorption properties of organic pollutants from coking wastewater on fly ash were investigated,and fly ash saturated with organic pollutants was regenerated by Fenton reagent experimentally.The results show that,in the range of 283～313 K,the equilibrium adsorption is attained after 60 min,the equilibrium adsorption capacity decreases with increasing of temperature,and pH has little effect on the adsorption.Equilibrium adsorption data satisfy both Freundlich and Langmuir isotherms.The rate of adsorption follows first order kinetics before attaining equilibrium.Fenton regeneration has significant effect.When molar ration of Fe（Ⅱ） to H2O2 is 1︰3,mass ration of H2O2 to COD is 2︰3,pH is 5,temperature is 30 ℃,Fenton oxidation time is 10 min,regeneration efficiency of the fly ash is up to 136%.

关 键 词：粉煤灰 吸附 FENTON 再生 焦化废水 

分 类 号：X703[环境科学与工程—环境工程]