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Ibuprofen Degradation and Associated Bacterial Communities in Hyporheic Zone Sediments

机译：软质区沉积物中的布洛芬降解和相关细菌群落

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Ibuprofen, a non-steroidal anti-inflammatory pain reliever, is among pharmaceutical residues of environmental concern ubiquitously detected in wastewater effluents and receiving rivers. Thus, ibuprofen removal potentials and associated bacteria in the hyporheic zone sediments of an impacted river were investigated. Microbially mediated ibuprofen degradation was determined in oxic sediment microcosms amended with ibuprofen (5, 40, 200, and 400 μM), or ibuprofen and acetate, relative to an un-amended control. Ibuprofen was removed by the original sediment microbial community as well as in ibuprofen-enrichments obtained by re-feeding of ibuprofen. Here, 1-, 2-, 3-hydroxy- and carboxy-ibuprofen were the primary transformation products. Quantitative real-time PCR analysis revealed a significantly higher 16S rRNA abundance in ibuprofen-amended relative to un-amended incubations. Time-resolved microbial community dynamics evaluated by 16S rRNA gene and 16S rRNA analyses revealed many new ibuprofen responsive taxa of the Acidobacteria, Actinobacteria, Bacteroidetes, Gemmatimonadetes, Latescibacteria, and Proteobacteria. Two ibuprofen-degrading strains belonging to the genera Novosphingobium and Pseudomonas were isolated from the ibuprofen-enriched sediments, consuming 400 and 300 μM ibuprofen within three and eight days, respectively. The collective results indicated that the hyporheic zone sediments sustain an efficient biotic (micro-)pollutant degradation potential, and hitherto unknown microbial diversity associated with such (micro)pollutant removal.
机译：布洛芬是一种非甾体抗炎疼痛缓解，是在废水污水和接收河流中普遍检测到的环境问题的药物残留。因此，研究了受冲击河的低于区沉积物中的布洛芬去除电位和相关细菌。微观介导的布洛芬降解在与未修正的对照中用布洛芬（5,40,20,20和400μm）或布洛芬和乙酸盐进行修正的氧沉积物微观。由原始沉积物微生物群落中除去布洛芬，以及通过再喂布布洛芬获得的布洛芬富集。这里，1-，2-，3-羟基和羧基 - 布洛芬是初级转化产物。定量实时PCR分析显示出在与未修正的温育相比的布洛芬修正的16S rRNA丰富。通过16S rRNA基因评估的时间分辨微生物群落动态和16S rRNA分析显示了抗酸体，抗菌菌，菌斑，乳头治疗，裂纹杆菌和植物的许多新的布洛芬响应征集。属于属Novosphingobium和假鼠的两个布洛芬降解菌株从布洛芬富集的沉积物中分离，分别在三和八天内消耗400和300μm布洛芬。该集体结果表明，低于多发性区沉积物维持有效的生物（微量）污染物降解潜力，以及与此类（微）污染物的除去相关的迄今未知的微生物多样性。

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