CAJ | 학술논문

文章比较了高铁酸钾、次氯酸钠、高铁酸钾与次氯酸钠联用对PVA的降解效果,考察了高铁酸钾和次氯酸钠的投加量、氧化时间、PVA溶液的pH值和初始质量浓度对PVA去除率的影响.通过红外光谱及黏度测定,对降解产物及其分子量变化进行了分析.结果表明,用高铁酸钾与次氯酸钠联合氧化PVA时,降解效果最佳;在3.0 g/L,pH值为7.2的PVA溶液中,当高铁酸钾与次氯酸钠的投加量分别为0.32 g/L、3.92 g/L,反应时间为50 min时,PVA的去除率大于98%,COD去除率大于40%;在联合氧化降解过程中,PVA断链成小分子物质,最终降解产物主要为羧基化合物.
문장비교료고철산갑、차록산납、고철산갑여차록산납련용대PVA적강해효과,고찰료고철산갑화차록산납적투가량、양화시간、PVA용액적pH치화초시질량농도대PVA거제솔적영향.통과홍외광보급점도측정,대강해산물급기분자량변화진행료분석.결과표명,용고철산갑여차록산납연합양화PVA시,강해효과최가;재3.0 g/L,pH치위7.2적PVA용액중,당고철산갑여차록산납적투가량분별위0.32 g/L、3.92 g/L,반응시간위50 min시,PVA적거제솔대우98%,COD거제솔대우40%;재연합양화강해과정중,PVA단련성소분자물질,최종강해산물주요위최기화합물.
A comparison of the degradation effectiveness of PVA by potassium ferrate,sodium hypo-chlorite and combination of them was studied.The effects of potassium ferrate and sodium hypochlo-rite dosage,oxidation time,initial concentration of PVA and pH on removal rate of PVA were ex-plored.The degradation product and the changes of its molecular weight were analyzed by IR and the viscosity method-The results show that the degradation effectiveness of PVA was optimum when po-tassium ferrate and sodium hypochlorite were jointly used as the oxidative agent.The removal rate of PVA and COD was more than 98% and 40% under the conditions that the concentration of PVA was 3.0 g/L and the pH value was 7.2,the dosage of potassium ferrate and sodium hypo chlorite were 0.32 g/L and 3.92 g/L,and the reaction time was 50 min.In the process of united oxidative degrada-tion,the chain of PVA was cut off and many low molecular weight compounds were formed.The main degradation products were carboxyl compounds.