CAJ | 학술논문

采用零价铁（Fe0）活化过硫酸钠（PDS）的方式产生具有强氧化性的硫酸根自由基,以偶氮染料甲基橙（MO）为目标污染物,考察了硫酸根自由基对甲基橙的氧化降解行为。系统研究了PDS、Fe0投加量、体系初始pH值、反应温度以及染料初始浓度对反应的影响。结果表明：Fe0/PDS体系能有效地降解甲基橙,在MO初始浓度100 mg/L、PDS投加量为0.912 mmol/L、Fe0投加量0.16 g/L、初始pH值为4.0、温度为298 K的条件下,反应进行2.5 h MO去除率达到80.2%;同时还探索了Fe0/PDS体系降解MO的动力学过程,证实了MO的降解分为两个阶段,且第二阶段的氧化降解符合一级动力学反应。
채용령개철（Fe0）활화과류산납（PDS）적방식산생구유강양화성적류산근자유기,이우담염료갑기등（MO）위목표오염물,고찰료류산근자유기대갑기등적양화강해행위。계통연구료PDS、Fe0투가량、체계초시pH치、반응온도이급염료초시농도대반응적영향。결과표명：Fe0/PDS체계능유효지강해갑기등,재MO초시농도100 mg/L、PDS투가량위0.912 mmol/L、Fe0투가량0.16 g/L、초시pH치위4.0、온도위298 K적조건하,반응진행2.5 h MO거제솔체도80.2%;동시환탐색료Fe0/PDS체계강해MO적동역학과정,증실료MO적강해분위량개계단,차제이계단적양화강해부합일급동역학반응。
Oxidative degradation of methyl orange（MO） in aqueous solution by zero-valent iron-activated sodium peroxydisulfate（PDS） was investigated.The degradation process was based on generation of sulfate radicalsas powerful oxidizing species.The effects of dosages of PDS and Fe0,initial pH,temperature and initial concentration of MO on MO degradation were examined in batch experiments.The results demonstrated that MO could be degraded by Fe0/PDS reagent effectively.Under the condition with initial MO concentration 100 mg.L-1,PDS dosage 0.912 mmol.L-1,Fe0 dosage 0.16 g.L-1,pH 4.0,temperature 298 K,MO degradation in aqueous solution reached 80.2% within 2.5 h.At the same time,the kinetics of Fe0/PDS system oxidation of MO was investigated,and the results demonstrated that degradation of MO occurred in two stages,and the second stage of the reaction followed first-order kinetics behavior.