化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年
10期
2330-2334
,共5页
硫酸根自由基%橙黄G%过硫酸钠%过氧化氢
硫痠根自由基%橙黃G%過硫痠鈉%過氧化氫
류산근자유기%등황G%과류산납%과양화경
sulfate radical%orange G%sodium persulfate%hydrogen peroxide
以偶氮染料橙黄G（OG）为目标污染物,研究Fe2＋分别催化H2O2、S2O82-、H2O2-S2O82-降解0.1 mmol/LOG Fe2＋/H2O2体系,[Fe2＋]=1 mmol/L,pH=3,[H2O2]0=10 mmol/L,降解30 min OG脱色率为96%,随着pH值增大和[H2O2]0〉10 mmol/L,OG脱色率减小,呈线性变化。Fe2＋/S2O82-体系,随着S2O82-初始浓度增加OG脱色率增大,随着pH值增大OG脱色率减小,呈非线性变化。Fe2＋/H2O2-S2O82-体系,pH=3,[H2O2]0=2 mmol/L,[S2O82-]0〉10 mmol/L时OG脱色率持续增大。Fe2＋/H2O2-S2O82-体系矿化率最高。利用乙醇和硝基苯作为分子探针,采用分子探针竞争实验鉴定该体系中产生的SO4.和OH.。
以偶氮染料橙黃G（OG）為目標汙染物,研究Fe2＋分彆催化H2O2、S2O82-、H2O2-S2O82-降解0.1 mmol/LOG Fe2＋/H2O2體繫,[Fe2＋]=1 mmol/L,pH=3,[H2O2]0=10 mmol/L,降解30 min OG脫色率為96%,隨著pH值增大和[H2O2]0〉10 mmol/L,OG脫色率減小,呈線性變化。Fe2＋/S2O82-體繫,隨著S2O82-初始濃度增加OG脫色率增大,隨著pH值增大OG脫色率減小,呈非線性變化。Fe2＋/H2O2-S2O82-體繫,pH=3,[H2O2]0=2 mmol/L,[S2O82-]0〉10 mmol/L時OG脫色率持續增大。Fe2＋/H2O2-S2O82-體繫礦化率最高。利用乙醇和硝基苯作為分子探針,採用分子探針競爭實驗鑒定該體繫中產生的SO4.和OH.。
이우담염료등황G（OG）위목표오염물,연구Fe2＋분별최화H2O2、S2O82-、H2O2-S2O82-강해0.1 mmol/LOG Fe2＋/H2O2체계,[Fe2＋]=1 mmol/L,pH=3,[H2O2]0=10 mmol/L,강해30 min OG탈색솔위96%,수착pH치증대화[H2O2]0〉10 mmol/L,OG탈색솔감소,정선성변화。Fe2＋/S2O82-체계,수착S2O82-초시농도증가OG탈색솔증대,수착pH치증대OG탈색솔감소,정비선성변화。Fe2＋/H2O2-S2O82-체계,pH=3,[H2O2]0=2 mmol/L,[S2O82-]0〉10 mmol/L시OG탈색솔지속증대。Fe2＋/H2O2-S2O82-체계광화솔최고。이용을순화초기분작위분자탐침,채용분자탐침경쟁실험감정해체계중산생적SO4.화OH.。
The oxidative degradation of 0.1 mmol/L orange G(OG) in Fe2+/H2O2、Fe2+/S2O82-、 Fe2+/H2O2-S2O82-was studied.In the Fe2+/H2O2 reaction,under the optimum condition(pH=3,[H2O2]0=10 mmol/L and [Fe2+]0=1 mmol/L),OG degradation in aqueous solutions with initial concentration of 0.1 mmol/L reached 96% within 30 min.However,retardation was observed if H2O2 was overdosed.Such retardation was not observed in the Fe2+/S2O82-system,but a nonlinear increment of removal efficiency was identified.Degradation of OG was enhanced with increasing S2O82-initial concentration but decreased at the presence of hydroxyl ion.In the aqueous system of initial pH value of 3,the optimal operation condition of Fe2+/H2O2-S2O82-was determined to be H2O2concentration 2 mmol/L.OG degradation increased with increasing dosage of persulfate.Furthermore,it was experimentally found that the Fe2+/H2O2-S2O82-process on the other hand showed the best mineralization in OG degradation.The sulfate free radical and hydroxyl free radical produced in the system were determined by molecular probes(ethanol and nitrobenzene) methods,and the reaction mechanism of producing sulfate free radical in the Fe2+/H2O2-S2O82-system was discussed.
