摘要
为了解决燃煤电厂脱硫废水COD浓度过高的问题,以无烟煤、活性氧化铝、羟基磷灰作为吸附材料,采用吸附动力学实验、吸附热力学实验和穿透曲线实验方法,结合相关模型,对燃煤电厂脱硫废水COD吸附性能进行探究.实验结果表明:三种吸附剂对COD的吸附过程符合准二级动力学模型、Freundlich吸附等温模型及Yoon-Nelson吸附穿透模型.从三种吸附剂的准二级速率常数、吸附能力常数、吸附强度指数及吸附50%的COD所需时间来看,无烟煤去除COD的效果优于活性氧化铝和羟基磷灰石,且吸附饱和的无烟煤可直接进行焚烧处理,降低固废的产生量和处理成本,对吸附剂的选择有一定的指导意义.
In order to solve the problem of its excessively high COD concentration,the COD adsorption performance of the desulfurizated wastewater from coal power plants was researched by the experiments,combined with relevant models,of adsorption kinetics,adsorption thermodynamics and breakthrough curve with anthracite,activated alumina and hydroxyapatite used as adsorbent materials.The experimental results show that the COD adsorption process of the three adsorbents conforms to a quasi-second-order kinetic model,a Freundlich adsorption isotherm model and a Yoon-Nelson adsorption penetration model.From the quasi-second-order rate constant,adsorption capacity constant,adsorption strength index and the time required to adsorb 50%of the COD of the three adsorbents,the effect of anthracite on COD removal is better than that of activated alumina and hydroxyapatite,and the adsorption saturation anthracite is able to be directly incinerated to reduce the amount of solid waste generated and the cost of treatment,which has certain guiding significance for the selection of adsorbents.
作者
潘祥伟
高良敏
包文运
向朝虎
吴晔
陈阳
朱圣捷
PAN Xiangwei;GALiangmin;BAWenyun;XIANG Chaohu;WU Ye;CHEN Yang;ZHU Shengjie(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China;Datang Environmental Industry Group Co.,Ltd.Franchise Branch,Nanjing Jiangsu 211106,China)
出处
《安徽理工大学学报（自然科学版）》
CAS
2020年第4期60-66,共7页
Journal of Anhui University of Science and Technology:Natural Science
基金
中国大唐集团公司科学技术基金资助项目(DTEG-TXJX-FW010-2018)。
关键词
吸附法
脱硫废水
吸附动力学
吸附热力学
穿透曲线
adsorption method
desulfurizated wastewater
adsorption kinetics
adsorption thermodynamics
breakthrough curve
