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首页> 外文期刊>Separation and Purification Technology >Effects of coexisting anions on decolorization of azo dye X-3B by ferrate(VI) and a comparative study between ferrate(VI) and potassium permanganate
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Effects of coexisting anions on decolorization of azo dye X-3B by ferrate(VI) and a comparative study between ferrate(VI) and potassium permanganate

机译：共存阴离子对高铁酸盐（VI）偶氮染料X-3B脱色的影响以及高铁酸盐（VI）和高锰酸钾的比较研究

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In this study, the effects of anions on the decolorization reaction by potassium ferrate(VI) were investigated for the first time and a comparative investigation between potassium ferrate(VI) and potassium permanganate was carried out. Anions such as Cl~-, SO_4~(2-), and NO_3~- showed favorable effects on color removal, while, CO_3~(2-) and PO_4~- displayed inhibitory effects. The effects of the oxidant concentration, initial solution pH, dye concentration and temperature on color removal were studied, and the removal efficiencies of chemical oxygen demand (COD) and total organic carbon (TOC) were also examined. The decolorizing capacity of ferrate(VI) was better than potassium permanganate. When dye concentration was 100mg/L, oxidants were both 150mg/L, 100% color removal was achieved by K2FeO4 treatment while only 62.04% by KMnO4. Ferrate(VI) has stably high decolorizing efficiency up to 85% in a wide pH range from 4.0 to 9.0. However, potassium permanganate only had better efficiency under acidic solution (100% color removal at pH 3.0, while only 78.05% at pH 9.0). At the temperature of 60 °C, approximately 80% decolorizing efficiency was achieved by ferrate(VI) while potassium permanganate only 59.37%. Ferrate(VI) acquired 58.33% COD and 24.15% TOC removal while potassium permanganate only 42.86% and 9.94% respectively. The oxidizing order was that color > COD > TOC both for K2FeO4 and KMnO4.
机译：本研究首次研究了阴离子对高铁酸钾（VI）脱色反应的影响，并对高铁酸钾（VI）和高锰酸钾进行了比较研究。阴离子如Cl〜-，SO_4〜（2-）和NO_3〜-对脱色表现出有利的影响，而CO_3〜（2-）和PO_4〜-具有抑制作用。研究了氧化剂浓度，初始溶液的pH，染料浓度和温度对颜色去除的影响，还研究了化学需氧量（COD）和总有机碳（TOC）的去除效率。高铁酸盐（VI）的脱色能力优于高锰酸钾。当染料浓度为100mg / L时，氧化剂均为150mg / L，通过K2FeO4处理可实现100％的脱色，而通过KMnO4仅可实现62.04％的脱色。高铁酸盐（VI）在4.0至9.0的宽pH范围内具有高达85％的稳定高脱色效率。然而，高锰酸钾仅在酸性溶液下具有更好的效率（在pH 3.0时100％的颜色去除，而在pH 9.0时仅78.05％的颜色去除）。在60°C的温度下，高铁酸盐（VI）达到约80％的脱色效率，而高锰酸钾仅为59.37％。高铁酸盐（VI）获得了58.33％的COD和24.15％的TOC去除，而高锰酸钾分别仅为42.86％和9.94％。对于K2FeO4和KMnO4，氧化顺序是颜色> COD> TOC。

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