摘要
针对污水管道硫化物的生成和积累导致管道腐蚀、臭味逸散问题,提出CaO_(2)/Fe^(2+)协同控制方法.研究了不同CaO_(2)和Fe^(2+)投加量条件下硫化物氧化动力学和作用机制,分析了pH值、温度、无机离子对硫化物氧化去除效能的影响,通过连续流反应评估了CaO_(2)/Fe^(2+)协同控制方法对污水管道硫化物控制效能.结果表明CaO_(2)/Fe^(2+)协同氧化去除硫化物符合伪一级反应动力学,反应过程中生成的HO·是氧化硫化物的主要活性物种,当CaO_(2)和Fe^(2+)物质的量比为4:1时,氧化速率最优;硫化物氧化速率与pH值呈现负相关,与温度呈现正相关,水中常见阴离子和铵离子对氧化速率无显著影响;CaO_(2)/Fe^(2+)协同投加可有效控制硫化物生成,当药剂投加量与污水比例(W/V)为0.30%时,硫化物50%生成率恢复周期达8.34d.
This paper proposes a CaO_(2)/Fe^(2+)collaborative control method for addressing the corrosion and odor issues in sewer systems.The effect of different dosing methods on the kinetics and mechanism of sulfide oxidation was analyzed,followed by the analysis on the effect of the pH level,temperature,inorganic irons and other factors on the oxidative removal efficiency of sulfide.The results showed that the synergistic oxidation of CaO_(2)/Fe^(2+)for sulfides removal agrees with the pseudo-first-order reaction kinetics with the main active specie of oxidized sulfides of HO·.A molar ratio of CaO_(2)and Fe^(2+)of 4:1 corresponds to the optimal the oxidation rate of sulfides.The oxidation rate of sulfide was negatively correlated with correlated with temperature.No significant effect was found for common anions and ammonium ions on oxidation rate.When the ratio of dosage to sewage(W/V)is 0.30%,the recovery period of 50%sulfide generation rate is 8.34 days,which indicates that the synergistic dosing of CaO_(2)/Fe^(2+)can effectively control the formation of sulfide.
作者
张志强
刘雨欣
孙逸帆
赵磊
任晓卫
杨静
宋姗姗
任亚婷
卢金锁
ZHANG Zhi-qiang;LIU Yu-xin;SUN Yi-fan;ZHAO Lei;REN Xiao-wei;YANG Jing;SONG Shan-shan;REN Ya-ting;LU Jin-suo(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2024年第10期5649-5657,共9页
China Environmental Science
基金
国家自然科学基金项目(52370100,52300121)
中国博士后科学基金面上项目(2020M673351)
哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(HC202245)。
关键词
管道腐蚀
恶臭气体
协同效应
反应动力学
控制效能
sewer corrosion
foul-smelling gases
synergistic effects
reaction kinetics
control efficiency
