马基诺矿(FeS)非均相类Fenton 催化活化H2O2降解RhB
Nature Abundant Mackinawite (FeS) for Efficient Fenton Degradation of RhB
投稿时间:2019-03-23  修订日期:2019-03-23
DOI:
中文关键词: Fenton反应  马基诺矿(FeS)  H2O2  RhB
英文关键词: Fenton reaction  mackinawite (FeS)  H2O2  RhB
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
唐和清 中南民族大学资源与环境学院 tangheqing@mail.scuec.edu.cn 
胡月 中南民族大学资源与环境学院  
丁耀彬 中南民族大学资源与环境学院  
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中文摘要:
      近年来高级氧化技术(AOPs)在污水处理中蓬勃发展。针对均相Fenton反应 pH适用范围窄、催化剂难以回收,易造成二次污染等问题,对于非均相Fenton试剂的研究备受人们的关注,其中铁硫化合物作为一种自然界丰富存在的具有氧化还原性质的含铁材料,受到了环境工作者的广泛关注。本文选用自然界存量丰富的马基诺矿(FeS)作为Fenton试剂,以罗丹明B(RhB)为模型污染物,考察了该催化剂的催化活性。结果表明,在FeS/ H2O2体系中,加入0.5gL-1FeS和1mmolL-1 H2O2,反应仅15min,20μmolL-1的罗丹明B的去除率高达95%以上,氧化剂H2O2的利用率为88.4%,且pH适用范围广(pH 3-9),在相同体系下同浓度的MB、MO完全降解分别只需要15min、20min。这说明硫化亚铁矿能在较宽的pH范围内有效的催化活化H2O2,快速降解RhB等染料分子。此外,利用羟基自由基较高的氧化能力,在循环流动系统中流速为8.3mLmin-1时,循环过柱120min后RhB的去除率达到95%。这种高性能催化剂的方便获取及其在连续流反应中的有效应用,标志着基于羟基自由基的高级氧化技术在实际应用中又向前迈出了一步。
英文摘要:
      With the development of advanced oxidation process (AOPs) in wastewater treatment in recent years, for the homogeneous acidity of Fenton should be controlled in the range of acidity, catalyst is difficult to recycle, easy to cause two pollution etc. these problems, the study of nonhomogeneous Fenton reagent has attracted much attention, including iron sulfur compounds as with a nature existence of redox properties of iron containing materials, widely concerned by environmental workers. In this paper the nature abundant mackinawite (FeS) as a Fenton agent, RhB as a model pollutant, investigated the catalytic activity of the catalyst. The results showed that in the FeS/ H2O2 system, reaction only 15min, RHB removal rate reaches more than 95%, the oxidation rate of H2O2 was 88.4%, and the wide range of pH (pH 3~9).In the same system ,it only needed 15 minutes and 20 minutes for the complete degradation of MO and MB at the same concentration. This shows that ferrous sulfide can effectively catalyze the activation of H2O2 in a wide pH range and rapidly degrade dyes such as RhB. In addition, leveraging on the high oxidability of hydroxyl radical, the removal rate of RhB can reach 95% when the flow rate in the circulating flow system is 8.3mL min-1 and the oxidation ability of hydroxyl radical is higher than that of hydroxyl radical, the degradation rate of RhB could increase above 95% at a flow rate of 2mLmin-1 after circulating column 120 min. The convenient synthesis of a high-performance catalyst and its efficient application to a continuous-flow reaction represent a further step towards practical application of hydroxyl radical based advanced oxidation processes.
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