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首页> 外文期刊>RSC Advances >Palladium nanoparticles produced and dispersed by Caldicellulosiruptor saccharolyticus enhance the degradation of contaminants in water
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Palladium nanoparticles produced and dispersed by Caldicellulosiruptor saccharolyticus enhance the degradation of contaminants in water

机译：由Caldicellulosiruptor Saccharolytic生产和分散的钯纳米粒子增强了水中污染物的降解

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摘要

This study focused on examining the general applicability of coupling bio-palladium (Pd) nanoparticle generation and bio-H-2 produced by Caldicellulosiruptor saccharolyticus for wastewater treatment under extreme thermophilic conditions. Na2PdCl4 was added to cell cultures to achieve a final Pd concentration of 50 mg L-1. Methyl orange (MO) and diatrizoate were chosen as the contaminants in water. In the cultures with, and without, Pd added, MO (100 mg L-1) was degraded within 30 min and in over 6 h, respectively. Diatrizoate (20 mg L-1) was degraded within 10 min in Pd-added cultures. However, no diatrizoate degradation happened without Pd addition. The degradation rates were correlated positively with dissolved hydrogen generated by C. saccharolyticus. Furthermore, the catalytic actions of Pd (0) nanoparticles and cells were distinguished during the degradation process. MO was degraded under the combined action of Pd (0) and hydrogenase. However, Pd (0) was the essential catalyst, and hydrogenase had no effect on the deiodination of diatrizoate within 20 min. Pd (0) particles were dispersed well by the cells of C. saccharolyticus and showed a better catalytic activity than Pd 0) formed without cells. Dissolved hydrogen produced by C. saccharolyticus should be the perfect reduction equivalent for Pd formation and for reducing degradation. Therefore, Pd should be added to C. saccharolyticus cultures to enhance the degradation of contaminants in water.
机译：该研究侧重于检查通过CaldiCellulosiruptor Saccharolytics在极端嗜热条件下进行Caldicellulosirosirupor Saccharolytics生产的生物钯（Pd）纳米粒子产生和生物-H-2的一般适用性。将Na2PdCl4加入细胞培养物中以达到50mg L-1的最终Pd浓度。选择甲基橙（Mo）和脱噻唑酸盐作为水中的污染物。在培养物中，没有添加Pd，Mo（100mg L-1）在30分钟内分别在超过6小时内降解。在Pd加入培养物中，脱噻唑酸盐（20mg L-1）在10分钟内降解。然而，没有PD加入没有脱霉素降解。降解速率与C. Saccharolyticus产生的溶解氢相当呈正相关。此外，在降解过程中，区分Pd（0）纳米颗粒和细胞的催化作用。 Mo在Pd（0）和氢酶的组合作用下降解。然而，Pd（0）是必需催化剂，氢酶对20分钟内脱碘酸盐的脱碘酸盐没有影响。 Pd（0）颗粒通过C. Saccharolyticcus的细胞分散良好，并显示出没有细胞的没有PD 0的更好的催化活性。由C. Saccharolytics产生的溶解氢应该是PD形成的完美减少，并用于降低降解。因此，应该将Pd加入到C. Saccharolyticus培养物中以增强水中污染物的降解。

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  • 来源
    《RSC Advances》 |2015年第20期|共7页
  • 作者

    Shen Nan; Xia Xiu-Yang; Chen Yun; Zheng Hang; Zhong Yong-Chen; Zeng Raymond J.;

  • 作者单位

    Univ Sci &

    Technol China Dept Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China Dept Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China Dept Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

    Univ Queensland Sch Earth Sci St Lucia Qld 4072 Australia;

    Jiansu Zhongheng Architectural D&

    R Inst Co Ltd Yangzhou Jiangsu Peoples R China;

    Univ Sci &

    Technol China Dept Chem CAS Key Lab Urban Pollutant Convers Hefei 230026 Anhui Peoples R China;

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