Chemical oxygen demand oxidation via sustained-release persulfate balls: a rate-compatibility study of flow velocity, releasing, and oxidation
过硫酸钠缓释球氧化COD的渗流、释放和氧化速率协调研究作者机构:Institute of Geotechnical EngineeringZhejiang UniversityHangzhou 310058China Shanghai Envirunion Eco-technology Co.Ltd.Shanghai 201106China China Railway Eryuan Engineering Group East China Survey and Design Co.LtdHangzhou 310043China The Architectural Design&Research Institute of Zhejiang University CoLtd.Hangzhou 310027China
出 版 物:《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报(英文版)A辑(应用物理与工程))
年 卷 期:2024年第25卷第9期
页 面:749-762页
核心收录:
基 金:Ministry of Science and Technology of China(Nos.2019YFC1805002 and 2018YFC1802300) National Natural Science Foundation of China(Nos.42177118 and 51779219) Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China(No.51988101) Overseas Expertise Introduction Center for Discipline Innovation(No.B18047),China
主 题:Chemical oxygen demand(COD) Sodium persulfate(PS) Sustained-release balls Permeable reactive barrier(PRB) Fe(II)-loaded activated carbon(Fe-AC)
摘 要:Identification of chemical oxygen demand(COD)in municipal solid waste(MSW)landfill leachates is a challenging *** paper investigated the feasibility of using sodium persulfate(PS),a strong oxidant,as a permeable reactive barrier(PRB)filling ***,sustained-release persulfate balls were manufactured to adjust the release rate of persulfate,the oxidation *** addition,Fe(II)-loaded activated carbon(Fe-AC)was used to help with an even distribution of Fe(II)in the porous medium(PRB in this case).Then,the oxidation efficiency and kinetic rate of COD removal by the sustained-release balls were subjected to batch tests.A mass ratio of 1:1.4:0.24:0.7 for PS:cement:sand:water was the most efficient for COD removal(95%).The breakthrough curve for a 5 mm sustained-release ball revealed that the retardation factor was 1.27 and that the hydrodynamic dispersion coefficient was 15.6 cm^(2)/*** corresponding half-life of COD oxidation was 0.43 d,which was comparable with the half-life of PS release from sustained-release balls(0.56 d).The sustained-release persulfate balls were shown to be an economical material with a simple recipe and production method when catalyzed by *** with cutting-edge methods,sustained-release balls used in PRBs offer significant advantages in terms of both effectiveness and economy for the preparation of sustained-release and catalytic *** results verified the feasibility of using sustained-release persulfate balls as a PRB material for COD removal.