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Fenton试剂深度处理脱墨浆废水的反应动力学研究 |
Kinetics of Advanced Treatment of Papermaking Wastewater with Oxidation by Fenton′s Reagent |
收稿日期: |
DOI:10.11980/j.issn.0254-508X.2018.04.004 |
关键词: Fenton 造纸废水 CODCr去除 深度处理 动力学 |
Key Words:Fenton papermaking wastewater CODCr removal advanced treatment kinetics |
基金项目:陕西省重点研发计划(2017ZDXM-SF-096); 陕西科技大学博士启动基金项目(BJ14-05)。 |
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摘要:研究了以Fenton试剂为氧化剂,以聚丙烯酰胺(PAM)为絮凝剂对脱墨浆造纸废水氧化絮凝的深度处理方法,并对其氧化机理及动力学进行了分析。通过一系列单因素实验研究结果表明,Fenton氧化过程中各个影响因素对CODCr去除率均有不同的影响,综合比较各个实验结果发现,当体系中FeSO4投加量为0.5 g/L、n(H2O2)∶n(Fe2+)=1.5∶1、初始pH值=3.0、反应时间35 min时,氧化絮凝后CODCr去除率达到55.1%。以一级反应动力学方程为模型,对研究中氧化过程进行了多因素的动力学分析。通过多元回归分析模拟得到反应速率常数k的表达式为k=0.273[H2O2]-0.067[Fe2+]0.594。 |
Abstract:Advanced treatment wastewater from papermaking using deinked pulp as raw material was studied with the oxidation-flocculation method by Fenton′s reagent as oxidant and PAM as flocculant, and the oxidation mechanism and kinetics were analyzed. According to the results from a series of single-factor experiments, it was found that the various influence factors in the oxidation process had different effects on CODCr removal efficiency. From the experimental results, a desirable CODCr removal rate of 55.1% was obtained after oxidation-flocculation at FeSO4 dosage 0.5 g/L, molar ratio n(H2O2)∶n(Fe2+)=1.5∶1, initial pH=3.0 and reaction time t=35 min. A multi-factor kinetic of oxidation process analysis was carried out by using first-order model reaction rate constant k was expressed as k=0.273[H2O2]-0.067[Fe2+]0.594 through multiple regression analysis. |
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