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首页> 外文期刊>Atmospheric environment >A characterization of HULIS-C and the oxidative potential of HULIS and HULIS-Fe(Ⅱ) mixture in PM_(2.5) during hazy and non-hazy days in Shanghai
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A characterization of HULIS-C and the oxidative potential of HULIS and HULIS-Fe(Ⅱ) mixture in PM_(2.5) during hazy and non-hazy days in Shanghai

机译：上海雾霾和非雾霾期HULIS-C的表征以及PM_（2.5）中HULIS和HULIS-Fe（Ⅱ）混合物的氧化电势

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摘要

Humic-like substances (HULIS) were isolated from PM2.5 in Shanghai. The oxidative potential and the cytotoxicity of the isolated HULIS and its Fe(II) binary mixtures were evaluated by using cell-free Dithiothreitol (DTT) and cellular 3-(4,5-dimethylthiazol-2-y1)-2,5-diphenyltetrazolium bromide (MTT) assays. Our data showed that HULIS-C contents in spring during hazy and non-hazy days were relatively higher than in winter. Cell-free DTT and bioassay (reactive oxygen species (ROS) and MTT) results showed that higher ROS values were released from individual HULIS or SRFA (Suwannee River Fulvic Acid) compounds than HULIS-Fe(II) complexes and Fe(II) alone. In addition, DTT and ROS correlation results were in line with each other and the oxidative potentials of HULIS and its binary mixtures were strongly inter-correlated with carbonaceous components (WSOC, OC) in PM2.5. Dose-dependent MIT results revealed that cell mortality positively correlated with the mass concentrations of HULIS (10-50 mu g/ml). In the HULIS-Fe(II) system, the ROS generation ability depended on the mixing time of HULIS-C with Pe(II), thus suggesting that the organic-metal complexation time and the Fenton reaction induced by Fe (II) play a role in the cell mortality rate.
机译：从上海的PM2.5中分离出腐殖质样物质（HULIS）。分离的HULIS及其Fe（II）二元混合物的氧化电位和细胞毒性通过使用无细胞二硫苏糖醇（DTT）和细胞3-（4,5-二甲基噻唑-2-y1）-2,5-二苯基四唑来评估溴化物（MTT）分析。我们的数据显示，春季的雾霾天和非雾霾天的HULIS-C含量相对高于冬季。无细胞DTT和生物测定（活性氧（ROS）和MTT）结果表明，单独的HULIS或SRFA（Suwannee河黄腐酸）化合物释放的ROS值高于HULIS-Fe（II）配合物和Fe（II）。 。此外，DTT和ROS的相关结果彼此一致，HULIS及其二元混合物的氧化电位与PM2.5中的碳质组分（WSOC，OC）密切相关。剂量依赖性的MIT结果显示细胞死亡与HULIS的质量浓度（10-50μg/ ml）正相关。在HULIS-Fe（II）体系中，ROS的产生能力取决于HULIS-C与Pe（II）的混合时间，因此表明有机金属络合时间和Fe（II）引起的Fenton反应起着重要作用。在细胞死亡率中的作用。

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  • 来源
    《Atmospheric environment》 |2019年第12期|117058.1-117058.8|共8页
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  • 作者单位

    Shanghai Univ Sch Environm & Chem Engn Shanghai 200444 Peoples R China;

    East China Univ Sci & Technol Shanghai 200237 Peoples R China;

    Shanghai Univ Sch Life Sci Shanghai 200444 Peoples R China;

    Shandong Univ Sci & Technol Qingdao 266590 Shandong Peoples R China;

    Ctr Environm Sci Saitama Saitama 3740115 Japan;

    Saitama Univ Sch Sci & Engn Saitama 3388570 Japan;

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  • 正文语种 eng
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  • 关键词

    PM2.5; HULIS-C; Oxidative potential; Cytotoxicity;

    机译：PM2.5;HULIS-C;氧化电位;细胞毒性;

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