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首页> 外文期刊>Journal of Hazardous Materials >Insight into the short- and long-term effects of Cu(II) on denitrifying biogranules
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Insight into the short- and long-term effects of Cu(II) on denitrifying biogranules

机译：洞察Cu（II）对反硝化生物颗粒的短期和长期影响

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摘要

This study aimed to investigate the short- and long-term effects of Cu2+ on the activity and performance of denitrifying bacteria. The short-term effects of various concentrations,of Cu2+ on the denitrifying bacteria were evaluated using batch assays. The specific denitrifying activity (SDA) decreased from 14.3 +/- 2.2 (without Cu2+) to 6.1 +/- 0.1 mg N h(-1) g(-1) VSS (100 mgCu(2+) L-1) when Cu2+ increased from 0 to 100 mg L-1 with an increment of 10 mgCu(2+) L-1. A non-competitive inhibition model was used to calculate the 50% inhibition concentration (IC50) of Cu2+ on denitrifying sludge (30.6 +/- 2.5 mg L-1). Monod and Luong models were applied to investigate the influence of the initial substrate concentration, and the results suggested that the maximum substrate removal rate would be reduced with Cu2+ supplementation. Pre-exposure to Cu2+ could lead to an 18.2-46.2% decrease in the SDA and decreasing percentage of the SDA increased with both exposure time and concentration. In the continuous-flow test, Cu2+ concentration varied from 1 to 75 mg L-1; however, no clear deterioration was observed in the reactor, and the reactor was kept stable, with the total nitrogen removal efficiency and total organic carbon efficiency greater than 89.0 and 85.0%, respectively. The results demonstrated the short-term inhibition of Cu2+ upon denitrification, and no notable adversity was observed during the continuous-flow test after long-term acclimation. (C) 2015 Elsevier B.V. All rights reserved.
机译：这项研究旨在调查Cu2 +对反硝化细菌活性和性能的短期和长期影响。使用分批测定法评估了各种浓度的Cu2 +对反硝化细菌的短期影响。当Cu2 +时，比反硝化活性（SDA）从14.3 +/- 2.2（无Cu2 +）降至6.1 +/- 0.1 mg N h（-1）g（-1）VSS（100 mgCu（2+）L-1）从0增加到100 mg L-1，增加10 mgCu（2+）L-1。使用非竞争性抑制模型来计算Cu2 +对反硝化污泥（30.6 +/- 2.5 mg L-1）的50％抑制浓度（IC50）。应用Monod和Luong模型研究初始底物浓度的影响，结果表明，添加Cu2 +会降低最大底物去除率。预先暴露于Cu2 +可能导致SDA降低18.2-46.2％，并且SDA的降低百分比随暴露时间和浓度的增加而增加。在连续流测试中，Cu2 +的浓度从1到75 mg L-1不等。然而，在反应器中没有观察到明显的劣化，并且反应器保持稳定，总氮去除效率和总有机碳效率分别大于89.0和85.0％。结果表明，反硝化作用对Cu2 +具有短期抑制作用，长期适应后在连续流动试验中未观察到明显的逆境。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2016年第5期|448-456|共9页
  • 作者

    Chen Hui; Chen Qian-Qian; Jiang Xiao-Yan; Hu Hai-Yan; Shi Man-Ling; Jin Ren-Cun;

  • 作者单位

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China|Hangzhou Normal Univ, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China;

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China|Hangzhou Normal Univ, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China;

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China|Hangzhou Normal Univ, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China;

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China;

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China;

    Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China|Hangzhou Normal Univ, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cu2+ toxicity; Denitrifying biogranules; Pre-exposure; Kinetic models; Acclimation;

    机译：Cu2 +毒性;反硝化生物颗粒;预接触;运动学模型;气候;

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