摘要：

对极难生物降解性呋吗唑酮模拟废水进行了臭氧化处理研究,考察了臭氧进气量、pH、HO·清除剂的消除、臭氧投加量、废水初始浓度、催化剂等对反应的影响,并对反应动力学进行了初步探讨。在持续强碱性溶液中,臭氧自分解产生HO·,能快速且无选择性地氧化呋吗唑酮为二氧化碳、水、氮气及少量小分子有机醛和酸,在模拟废水质量浓度为500mg/L,最佳pH12.8,臭氧投加量2g/L,BOD₅/COD_Cr>0.3时,可生化性显著提高;臭氧投加量6g/L时,脱色率达100%,COD_Cr和TOC去除率分别达到95.9%和95.2%,水中有机物基本完全矿化。

关键词: 臭氧, 臭氧化, 呋吗唑酮, 高级氧化工艺

Abstract:

The effects of the ozone inflow,pH value,removal of the hydroxyl radical inhibitor,ozone dose,initial wastewater concentration and catalyst on the reaction has been studied by using ozonization process to degrade bio-refractory furaltadone simulated wastewater.The reaction kinetics has also been explored.Results show that the self-decomposition of ozone at high pH values results in the formation of hydroxyl radicals,which can oxide furaltadone rapidly into CO₂,H₂O,N₂,ounce small-molecular-weight organic aldehyde and acid.When500mg/L wastewater is at optimal pH12.8,and the ozone dose is2g /L,the BOD₅ /COD Cr is over0.3.The biodegrad-ability has been improved remarkably;when the ozone dose is6g /L,the removal rates of chroma,COD_Cr and TOC are100%,95.9%and95.2%,respectively.The organic substances are almost entirely mineralized.

Key words: ozone, ozonization, furaltadone, advanced oxidation technology

中图分类号: 

• X703.1