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首页> 外文期刊>Environmental Science & Technology >Activation of Manganese Oxidants with Bisulfite for Enhanced Oxidation of Organic Contaminants: The Involvement of Mn(Ⅲ)
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Activation of Manganese Oxidants with Bisulfite for Enhanced Oxidation of Organic Contaminants: The Involvement of Mn(Ⅲ)

机译：亚硫酸氢盐活化锰氧化剂以增强有机污染物的氧化：Mn（Ⅲ）的参与

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摘要

MnO_4 was activated by HSO_3~-, resulting in a process that oxidizes organic contaminants at extraordinarily high rates. The permanganate/bisulfite (PM/BS) process oxidized phenol, riprofloxatin, and methyl blue at pH_(ini) 5.0 with rates (k~_(obs) ≈ 60-150 s~(-1)) that were 5-6 orders of magnitude faster than those measured for permanganate alone, and ～5 to 7 orders of magnitude faster than conventional advanced oxidation processes for water treatment. Oxidation of phenol was fastest at pH 4.0, but still effective at pH 7.0, and only slightly slower when performed in tap water. A smaller, but still considerable (～3 orders of magnitude) increase in oxidation rates of methyl blue was observed with MnO_2 activated by HSO_3~- (MO/BS). The above results, time-resolved spectroscopy of manganese species under various conditions, stoichiometric analysis of pH changes, and the effect of pyrophosphate on UV absorbance spectra suggest that the reactive intermediate(s) responsible for the extremely rapid oxidation of organic contaminants in the PM/BS process involve manganese(Ⅲ) species with minimal stabilization by complexation. The PM/BS process may lead to a new category of advanced oxidation technologies based on contaminant oxidation by reactive manganese(Ⅲ) species, rather than hydroxyl and sulfate radicals.
机译：MnO_4被HSO_3_-活化，导致氧化有机污染物的速率异常高。高锰酸盐/亚硫酸氢盐（PM / BS）在pH_（ini）5.0时以5-6级的速率（k〜_（obs）≈60-150 s〜（-1））氧化苯酚，瑞普沙汀和甲基蓝比单独使用高锰酸盐测量的速度快1个数量级，比用于水处理的传统先进氧化工艺快5到7个数量级。苯酚的氧化在pH 4.0时最快，但在pH 7.0时仍然有效，在自来水中进行时仅稍慢一些。在HSO_3〜-（MO / BS）活化的MnO_2中，观察到甲基蓝的氧化速率增加较小，但仍相当可观（〜3个数量级）。以上结果，各种条件下锰物种的时间分辨光谱，pH变化的化学计量分析以及焦磷酸盐对UV吸收光谱的影响表明，反应性中间体导致PM中有机污染物的极快氧化/ BS工艺涉及锰（Ⅲ）物种，其络合稳定性极低。 PM / BS工艺可能会导致一种新型的高级氧化技术，该技术基于反应性锰（Ⅲ）物种而不是羟基和硫酸根自由基的污染物氧化。

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  • 来源
    《Environmental Science & Technology》 |2015年第20期|12414-12421|共8页
  • 作者

    Bo Sun; Xiaohong Guan; Jingyun Fang; Paul G. Tratnyek;

  • 作者单位

    State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 20092, People's Republic of China,State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China;

    State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 20092, People's Republic of China;

    School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China;

    Institute of Environmental Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239-3098, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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