CAJ | 학술논문

利用正交法得出次氯酸盐氧化法合成高铁酸钾的最佳工艺条件，以FTIR、XRD、SEM、EDS、TEM表征证实其纯度可达95％．在砷、铅单独及复合污染的处理中比较了K2 FeO4投加量、起始pH对处理效果的影响．实验表明，当砷、铅起始质量浓度为2 mg／L，溶液pH 6.5，铁砷质量浓度比为16或铁铅质量浓度比为4时，沉淀后水中砷、铅质量浓度均可低于10μg／L；K2 FeO4同样能有效处理砷铅复合污染，在K2 FeO4投加量为24 mg／L时，对砷、铅的去除率分别为99.30％和100％；与单独污染相比，低K2 FeO4投加量下，砷与铅的竞争关系明显．通过结合Visual MINTEQ化学平衡模拟软件对实验机理进行分析表明：高铁酸钾通过氧化、电中和及表面络合等作用去除水中砷、铅．
이용정교법득출차록산염양화법합성고철산갑적최가공예조건，이FTIR、XRD、SEM、EDS、TEM표정증실기순도가체95％．재신、연단독급복합오염적처리중비교료K2 FeO4투가량、기시pH대처리효과적영향．실험표명，당신、연기시질량농도위2 mg／L，용액pH 6.5，철신질량농도비위16혹철연질량농도비위4시，침정후수중신、연질량농도균가저우10μg／L；K2 FeO4동양능유효처리신연복합오염，재K2 FeO4투가량위24 mg／L시，대신、연적거제솔분별위99.30％화100％；여단독오염상비，저K2 FeO4투가량하，신여연적경쟁관계명현．통과결합Visual MINTEQ화학평형모의연건대실험궤리진행분석표명：고철산갑통과양화、전중화급표면락합등작용거제수중신、연．
Potassium ferrate ( K2 FeO4 ) was synthesized by hypochlorite oxidation.Orthogonal method was applied to optimize the synthesis process.The obtained K2 FeO4 had a purity of 95% or higher.The synthesized K2 FeO4 was used as a coagulant to remove As( III) and Pb( II) in single and bi-solute systems.Effects of K2 FeO4 dosage and operating pH on the removal of As( III) and Pb( II) were studied.In the single system, results shows that at pH 6.5, Fe/As=16 ( wt/wt) and Fe/Pb=4 ( wt/wt) , the residual As and Pb were less than 10μg/L.In the bi-solute system, ferrate could remove As and Pb simultaneously.When ferrate dose was 24 mg/L, the removal rates of As and Pb were 99.30%and 100%, respectively.At low ferrate dose, the competitive adsorption behavior of As( III) and Pb( II) in the bi-solute system was observed.Visual MINTEQ software was used to calculate and sim-ulate metal speciation in solution at equilibrium aiming at elucidate the removal mechanism of As and Pb by potassi-um ferrate.