Changes in polycyclic aromatic hydrocarbon availability in River Tyne sediment following bioremediation treatments or activated carbon amendment
Changes in polycyclic aromatic hydrocarbon availability in River Tyne sediment following bioremediation treatments or activated carbon amendment
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DOI：
10.1016/j.watres.2010.06.027
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发表时间：
2010-08-01
期刊：
影响因子：
12.8
通讯作者：
Werner, David
中科院分区：
文献类型：
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作者：
Hale, Sarah E.;Meynet, Paola;Werner, David
生物修复和活性炭（AC）修正案进行了比较，从泰恩河沉积物的修复策略，含有16.4 +/- 7.3微克/克多环芳烃（PAHs）和约5%的煤颗粒的总干沉积物重量。未经修订的，营养物质修正（生物刺激）和营养和恶臭假单胞菌修正（生物增强）沉积物缩影未能显示出显着减少总沉积物多环芳烃浓度超过一个月的时间。聚乙烯被动（PE）采样器嵌入21天，在这些沉积物的缩影，以测量多环芳烃的有效部分，并积累了4.70 +/- 0.25，12.43 +/- 1.78，和23.49 +/- 2.73微克多环芳烃/克PE从未修正的，生物刺激的，和生物增强，缩影，分别。在生物刺激和生物强化的微观世界中，PE采样器对PAH的吸收更高，与未经修正的微观世界中的滤液相比，这些微观世界中无沉积物滤液中的加标菲降解较慢。微生物群落分析揭示了在添加营养物后细菌群落的直接变化，但添加的恶臭假单胞菌群落未能建立自身。添加2%干沉积物重量的活性炭减少了多环芳烃的吸收PE采样到0.28 +/- 0.01微克多环芳烃/克PE，一个大于90%的减少相比，未经修改的缩影。(C)2010爱思唯尔有限公司保留所有权利。
Bioremediation and activated carbon (AC) amendment were compared as remediation strategies for sediment from the River Tyne containing 16.4 +/- 7.3 mu g/g polycyclic aromatic hydrocarbons (PAHs) and approximately 5% coal particles by total dry sediment weight. Unamended, nutrient amended (biostimulated) and nutrient and Pseudomonas putida amended (bioaugmented) sediment microcosms failed to show a significant decrease in total sediment PAH concentrations over a one month period. Polyethylene passive (PE) samplers were embedded for 21 days in these sediment microcosms in order to measure the available portion of PAHs and accumulated 4.70 +/- 0.25, 12.43 +/- 1.78, and 23.49 +/- 2.73 mu g PAHs/g PE from the unamended, biostimulated, and bioaugmented,microcosms, respectively. Higher PAH uptake by PE samplers in biostimulated and bioaugmented microcosms coincided with slower degradation of spiked phenanthrene in sediment-free filtrate from these microcosms compared to filtrate from the unamended microcosms. Microbial community analysis revealed changes in the bacterial community directly following the addition of nutrients, but the added P. putida community failed to establish itself. Addition of 2% by dry sediment weight activated carbon reduced PAH uptake by PE samplers to 0.28 +/- 0.01 mu g PAHs/g PE, a greater than 90% reduction compared to the unamended microcosms. (C) 2010 Elsevier Ltd. All rights reserved.