丁耀彬 胡月 唐和清.马基诺矿(FeS)非均相类Fenton催化活化H2O2降解RhB[J].中南民族大学学报自然科学版,2020,39(2):111-117
马基诺矿(FeS)非均相类Fenton催化活化H2O2降解RhB
Mackinawite(FeS) for heterogeneous Fenton-like activation of H2O2 to degrade RhB
  
DOI:10.12130/znmdzk.20200201
中文关键词: Fenton反应  马基诺矿(FeS)  过氧化氢  罗丹明B
英文关键词: Fenton reaction  mackinawite (FeS)  H2O2  RhB
基金项目:湖北省自然科学基金资助项目(2018CFB623)
作者单位
丁耀彬 胡月 唐和清 中南民族大学 资源与环境学院武汉 430074 
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中文摘要:
      选用自然界存量丰富的马基诺矿(FeS)作为Fenton试剂,罗丹明B(RhB)为模型污染物,考察了该催化剂的催化活性,利用XRD、SEM对其进行了物相和形貌的表征. 利用EPR证明FeS/H2O2体系中主要的活性物种为羟基自由基(.OH),利用.OH 较高的氧化能力,设计了一个连续流反应循环装置.结果表明:经简单的机械研磨之后,平均粒径约为2 μm的不规则块状FeS,能有效地催化活化 H2O2去除RhB,反应仅15 min,20 μmol/L的RhB的去除率高达95%以上,H2O2的利用率达到88.4%,其中FeS用量为0.5 g/L, 氧化剂H2O2浓度为 1 mmol/L.该反应体系FeS/H2O2的pH适用范围较广(pH 3~9),在相同体系下完全降解同浓度的亚甲基蓝(MB)、甲基橙(MO)分别只需要15 min和20 min.当流动系统中液体流速为8.3 mL/min时,循环过柱120 min后RhB的去除率达到95%.
英文摘要:
      In this paper, the catalytic activity of Mackinawite (FeS), which is abundant in nature , as Fenton reagent, was investigated by using Rhodamine B (RhB) as model pollutant. The phase and morphology were characterized by XRD and SEM. It was proved by EPR that the main active species in FeS/H2O2 system was hydroxyl radical (.OH). Based on the high oxidation capacity of .OH, a continuous flow reaction cycle device was designed. The results showed that the irregular granules of FeS, with average particle size of 2 μm after simple mechanical grinding, could effectively remove 20 μmol/L RhB by catalytic activation of H2O2 for only 15 minutes. The removal rate was over 95% and the utilization rate of H2O2 was 88.4% with the concentration of FeS of 0.5 g/L, oxidizer H2O2 of 1 mmol/L. In addition, the system was tolerable to a wide pH range (pH 3–9), under which the same concentration of methylene blue (MB) and Methyl orange (MO) could be completely degraded within 15 minutes and 20 minutes, respectively. When the flow rate of liquid in the flow system was 8.3 mL/min, the removal rate of RhB reached 95% after circulating through the column in 120 minutes.
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