Enhanced transformation of phenolic compounds by manganese(IV) oxide, manganese(II) and permanganate in the presence of ligands: The determination and role of Mn(III)
Enhanced transformation of phenolic compounds by manganese(IV) oxide, manganese(II) and permanganate in the presence of ligands: The determination and role of Mn(III)
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在配体存在下，氧化锰(IV)、锰(II)和高锰酸盐促进酚类化合物的转化：Mn(III)的测定和作用
DOI：
10.1016/j.seppur.2020.118272
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发表时间：
2021-04
影响因子：
8.6
通讯作者：
Jun Ma
中科院分区：
文献类型：
--
作者：
Wen Qin;Peiyan Tan;Yang Song;Zhihong Wang;Jinxu Nie;Jun Ma
在本研究中，采用二乙基苯二胺 (DPD)、2,2'-连氮基双(3-乙基苯并噻唑啉)-6-磺酸盐 (ABTS) 和碘化钾 (KI) 的比色法测定痕量 (10 µM) 的锰 (III)-焦磷酸络合物 (Mn(III)-PP)。开发了一种臭氧化方法，通过量化溶解的 Mn 与 PP 的臭氧化过程中高锰酸盐 (Mn(VII)) 的生成来测量溶解的 Mn（包括 Mn(II) 和 Mn(III)）的浓度。采用臭氧化法与 DPD 法相结合，通过监测 MnO2 衰变和 Mn(III)/Mn(II) 形成来确定草酸存在下 MnO2 溶解动力学。 PP和草酸在酸性pH下可以增强MnO2对双酚A（BPA）的氧化，而在中性pH下没有发现促进作用。 EDTA在中性pH下对MnO2对BPA的氧化有增强作用，但在酸性pH下有抑制作用。该结果表明，Mn(III)-PP 在酸性 pH 下具有高活性，Mn(III)-草酸在酸性 pH 下具有高活性，Mn(III)-EDTA 在中性 pH 下具有高活性。在酸性pH条件下，低浓度的腐植酸(HA)对MnO2对BPA的氧化有增强作用，但由于HA占据了MnO2的活性位点，高剂量的HA却有抑制作用。此外，观察到去铁胺 B (DFO) 在碱性 pH 下可加速对苯二酚 (HQ) 与 Mn(II) 的转化，这归因于氧气与 Mn(II) 快速反应形成 Mn(III)-DFO。最后，评估了用于酚类化合物转化的Mn(VII)-还原剂-PP体系。 Mn(II)和亚硫酸氢盐这两种有效的还原剂(即Mn(III)诱导剂)可以在初始阶段加速Mn(III)-PP的形成，然后促进Mn(VII)对酚类化合物的氧化。在配体存在下，MnO2(IV)、Mn(II)和Mn(VII)由于生成Mn(III)而增强了酚类化合物的转化，这反映了Mn(III)在微污染水处理中的潜在应用价值。
In this study, colorimetric methods using diethyl phenylene diamine (DPD), 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS), and potassium iodide (KI) were adopted to determine manganese(III)-pyrophosphate complex (Mn(III)-PP) in trace levels (10 µM). An ozonation method was developed to measure the concentration of dissolved Mn including Mn(II) and Mn(III) via quantifying permanganate (Mn(VII)) generation during ozonation of dissolved Mn with PP. The ozonation method combined with DPD method were applied to determine MnO2dissolution kinetics in the presence of oxalic acid through monitoring MnO2decay and Mn(III)/Mn(II) formation. PP and oxalic acid could enhance the oxidation of bisphenol A (BPA) by MnO2at acidic pH, while no promoting effects were found at neutral pH. EDTA had enhancing effect on the oxidation of BPA by MnO2at neutral pH but inhibiting effect at acidic pH. This result indicated high activities of Mn(III)-PP at acidic pH, Mn(III)-oxalic acid at acidic pH, and Mn(III)-EDTA at neutral pH, respectively. Enhancing effect of low concentration of humic acid (HA) on the oxidation of BPA by MnO2at acidic pH, however inhibiting effect was found with high dosage of HA due to the occupation of HA on the active sites of MnO2. Furthermore, desferrioxamine B (DFO) was observed to accelerate the transformation of hydroquinone (HQ) with Mn(II) at alkaline pH, ascribed to the formation of Mn(III)-DFO from the reaction of oxygen with Mn(II) rapidly. Finally, a Mn(VII)-reducer-PP system for the transformation of phenolic compounds was evaluated. Two effective reducers (i.e., Mn(III) inducers), Mn(II) and bisulfite, could accelerate Mn(III)-PP formation in the initial step, and then promote the oxidation of phenolic compounds by Mn(VII). Transformation of phenolic compounds were enhanced by MnO2(IV), Mn(II) and Mn(VII) in the presence of ligands due to the generation of Mn(III), which reflected the potential application value of Mn(III) in micro-polluted water treatment.
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影响因子：
11.4
作者：
Zimeng Wang;W. Xiong;B. Tebo;D. Giammar
通讯作者：
Zimeng Wang;W. Xiong;B. Tebo;D. Giammar
影响因子：
5
作者：
Parker, DL;Sposito, G;Tebo, BM
通讯作者：
Tebo, BM
影响因子：
6.1
作者：
Madison, Andrew S.;Tebo, Bradley M.;Luther, George W., III
通讯作者：
Luther, George W., III
影响因子：
11.4
作者：
Klewicki, JK;Morgan, JJ
通讯作者：
Morgan, JJ
影响因子：
11.4
作者：
Sun, Bo;Guan, Xiaohong;Tratnyek, Paul G.
通讯作者：
Tratnyek, Paul G.