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馬基諾礦(FeS)非均相類Fenton 催化活化H2O2降解RhB
Nature Abundant Mackinawite (FeS) for Efficient Fenton Degradation of RhB
投稿時間:2019-03-23  修訂日期:2019-03-23
DOI:
中文關鍵詞: Fenton反應  馬基諾礦(FeS)  H2O2  RhB
英文關鍵詞: Fenton reaction  mackinawite (FeS)  H2O2  RhB
基金項目:國家自然科學基金項目(面上項目,重點項目,重大項目)
作者單位E-mail
唐和清 中南民族大學資源與環境學院 tangheqing@mail.scuec.edu.cn 
胡月 中南民族大學資源與環境學院  
丁耀彬 中南民族大學資源與環境學院  
摘要點擊次數: 165
全文下載次數: 0
中文摘要:
      近年來高級氧化技術(AOPs)在污水處理中蓬勃發展。針對均相Fenton反應 pH適用范圍窄、催化劑難以回收,易造成二次污染等問題,對于非均相Fenton試劑的研究備受人們的關注,其中鐵硫化合物作為一種自然界豐富存在的具有氧化還原性質的含鐵材料,受到了環境工作者的廣泛關注。本文選用自然界存量豐富的馬基諾礦(FeS)作為Fenton試劑,以羅丹明B(RhB)為模型污染物,考察了該催化劑的催化活性。結果表明,在FeS/ H2O2體系中,加入0.5gL-1FeS和1mmolL-1 H2O2,反應僅15min,20μmolL-1的羅丹明B的去除率高達95%以上,氧化劑H2O2的利用率為88.4%,且pH適用范圍廣(pH 3-9),在相同體系下同濃度的MB、MO完全降解分別只需要15min、20min。這說明硫化亞鐵礦能在較寬的pH范圍內有效的催化活化H2O2,快速降解RhB等染料分子。此外,利用羥基自由基較高的氧化能力,在循環流動系統中流速為8.3mLmin-1時,循環過柱120min后RhB的去除率達到95%。這種高性能催化劑的方便獲取及其在連續流反應中的有效應用,標志著基于羥基自由基的高級氧化技術在實際應用中又向前邁出了一步。
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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