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首页> 外文期刊>Journal of Colloid and Interface Science >Simultaneous removal of methylene blue and total dissolved copper in zero-valent iron/H2O2 Fenton system: Kinetics, mechanism and degradation pathway
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Simultaneous removal of methylene blue and total dissolved copper in zero-valent iron/H2O2 Fenton system: Kinetics, mechanism and degradation pathway

机译：零价铁/ H2O2 Fenton系统同时除去亚甲基蓝和总溶解铜：动力学，机制和降解途径

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摘要

This study aimed to investigate the simultaneous removal of methylene blue (MB) and total dissolved copper (TCu) by heterogeneous zero-valent iron (ZVI) Fenton-like system (ZVI/H2O2) and elucidate the mechanism of synergistic effect for co-contaminants removal. Hydroxyl radical ((OH)-O-center dot) formation was hypothesized to be the dominant pathway for the oxidation of MB, confirmed by the quenching experiments and ESR analysis. And the synergistic effect of TCu and ZVI greatly promoted the release of Fe2+, further accelerating the generation of hydroxyl radical ((OH)-O-center dot) via Fenton reaction. The generation process of (OH)-O-center dot was unveiled by quenching experiments and electron spin resonance (ESR) analysis, while the processes of ZVI corrosion and TCu reduction were revealed through several characterization approaches including SEM, XRD, FTIR and XPS. The degradation pathway of MB was also investigated by LC-MS analysis. The MB initial concentration, TCu initial concentration, H2O2 dosage, ZVI dosage and initial solution pH could play crucial roles in the removal of MB and TCu. The influence of water matrix including inorganic anions (Cl-, NO3-, HCO3-) and actual water was finally conducted to elucidate the role of natural organic matter (NOM) in the environmental systems. (C) 2019 Elsevier Inc. All rights reserved.
机译：本研究的目的是调查同时除去亚甲蓝（MB）的和总的非均相零价铁（ZVI）类芬顿系统（ZVI / H2O2）溶解的铜（TCU）和阐明的协同效应用于共污染物机构移动。羟基自由基（（OH）-O-中心点）形成被假设为MB的氧化，通过淬火实验和ESR分析证实了主要途径。和TCU和ZVI的协同效应极大地促进了Fe2 +的释放，通过芬顿反应进一步加快羟基自由基（（OH）-O-中心点）的产生。的生成处理（OH）-O-中心的点是通过淬火实验和电子自旋共振（ESR）分析揭开，而ZVI腐蚀和铜T减少的处理是通过几个表征方法包括SEM，XRD，FTIR和XPS显露。 MB的降解途径也由LC-MS分析研究。 MB的初始浓度，铜T初始浓度，H2O2投加量，ZVI剂量和初始溶液的pH值可以在去除MB和的TCU中起关键作用。水基质包括无机阴离子（氯离子，NO3-，HCO3-）和实际的水的影响，最后进行在环境系统阐明的天然有机物质（NOM）的作用。 （c）2019 Elsevier Inc.保留所有权利。

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