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氟喹诺酮对垂直流人工湿地性能及微生物群落的影响
摘要点击 212  全文点击 57  投稿时间:2018-01-16  修订日期:2018-03-02
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中文关键词  氟喹诺酮  人工湿地  净化效果  多样性  群落构成
英文关键词  fluoroquinolones  constructed wetland  performance  diversity  community composition
作者单位E-mail
李新慧 北京化工大学化学工程学院, 北京市水处理环保材料工程技术研发中心, 北京 100029 1637968354@qq.com 
郑权 北京化工大学化学工程学院, 北京市水处理环保材料工程技术研发中心, 北京 100029  
李静 河北圣泓环保科技有限责任公司, 承德 067000  
王晓慧 北京化工大学化学工程学院, 北京市水处理环保材料工程技术研发中心, 北京 100029  
海热提 北京化工大学化学工程学院, 北京市水处理环保材料工程技术研发中心, 北京 100029 hjzhx@mail.buct.edu.cn 
中文摘要
      为研究多种氟喹诺酮对人工湿地净化能力和微生物群落的影响,在人工湿地进水中添加两个月氧氟沙星、诺氟沙星和环丙沙星,监测水质变化和微生物群落变化.结果表明,进水中添加抗生素后,COD去除率逐渐降低,最低达到70.94%,但其可随着时间的延长逐步恢复.TP去除率在添加抗生素后也出现下降并有较大波动.氨氮去除率维持稳定状态.可见,氟喹诺酮对人工湿地的COD和TP净化能力有较大影响,对氨氮去除显著影响.微生物群落方面,抗生素添加前后的Shannon指数和Shannoneven指数显著变化,但Chao1指数显著增加.对比前和后两组的群落构成发现,Proteobacteria的相对丰度明显减小(从44.90%降低至34.12%),但其仍是优势种群,Firmicutes的相对丰度明显增加(从2.55%增加至10.55%).纲水平上,β-Proteobacteria相对丰度从17.03%降低至8.36%,Clostridia、Bacilli、Bacteroidia相对丰度分别从0.50%、1.85%、0.10%增加至4.21%、4.64%、2.56%.在属的分类水平上,DechloromonasPseudarthrobacter的相对丰度明显下降,分别从8.56%、5.10%下降至3.16%、1.53%,Trichococcus、TessaracoccusDesulfovibrio的相对丰度则分别从0.66%、0.03%、0.02%增加到了3.84%、3.83%、2.06%.因此,氟喹诺酮使人工湿地中的微生物群落发生了转变.
英文摘要
      In order to investigate the effect of multiple fluoroquinolones on the performance and microbial community of a constructed wetland, ofloxacin, norfloxacin, and ciprofloxacin were added to the influent of the vertical flow constructed wetland for two months. Results indicated that COD removal rate gradually decreased after adding antibiotics, with the minimum removal rate of 70.94%, followed by gradual recovery. TP removal rate also decreased, with some fluctuations, while ammonia removal remained stable. Fluoroquinolones thus have an important effect on COD and TP removal from the constructed wetland, but there is no evident effect on ammonia removal. Based on results of the Shannon index and Shannoneven index, there were no significant changes in the microbial community, while the Chao1 index increasing significantly. Comparing community composition before and after antibiotic addition, the relative abundance of Proteobacteria decreased from 44.90% to 34.12%, still maintaining its predominance, while Firmicutes increased from 2.55% to 10.55%. At the class level, β-Proteobacteria declined from 17.03% to 8.36%, while the relative abundance of Clostridia, Bacilli, and Bacteroidia increased from 0.50%, 1.85%, and 0.10% to 4.21%, 4.64%, and 2.56%, respectively. The genera Dechloromonas and Pseudarthrobacter decreased from 8.56% and 5.10% to 3.16% and 1.53%, respectively, while Trichococcus, Tessaracoccus, and Desulfovibrio increased from 0.66%, 0.03%, and 0.02% to 3.84%, 3.83%, and 2.06%, respectively. The microbial community of the constructed wetland thus changed under the pressure of multiple fluoroquinolones.

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