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首页> 外文期刊>Environmental Science & Technology >Processing of Particulate Organic Carbon Associated with Secondary-Treated Pulp and Paper Mill Effluent in Intertidal Sediments: A ~(13)C Pulse-chase Experiment
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Processing of Particulate Organic Carbon Associated with Secondary-Treated Pulp and Paper Mill Effluent in Intertidal Sediments: A ~(13)C Pulse-chase Experiment

机译：潮间带沉积物与二次处理纸浆和造纸厂废水相关的颗粒有机碳的处理：〜（13）C脉冲追踪实验

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摘要

To determine the benthic transformation pathways and fate of carbon associated with secondary-treated pulp and paper mill (PPM) effluent,~(13)C-labeled activated sludge biomass (ASB) and phytoplankton (PHY) were added,separately,to estuarine intertidal sediments.Over 28 days,~(13)C was traced into sediment organic carbon,fauna,seagrass,bacteria,and microphytobenthos and into fluxes of dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) from inundated sediments,and carbon dioxide (CO_2(g)) from exposed sediments.There was greater removal of PHY carbon from sediments (～85% over 28 days) compared to ASB (～75%).Although there was similar ~(13)C loss from PHY and ASB plots via DIC (58% and 56%,respectively) and CO_2(g) fluxes (＜1%),DOC fluxes were more important for PHY (41%) than ASB (12%).Faster downward transport and loss suggest that fauna prefer PHY,due to its lability and/or toxins associated with ASB; this may account for different carbon pathways.Secondary-treated PPM effluent has lower oxygen demand than primary-treated effluent,but ASB accumulation may contribute to sediment anoxia,and respiration of ASB and PHY-derived DOC may make the water column more heterotrophic.This highlights the need to optimize secondary-treatment processes to control the quality and quantity of organic carbon associated with PPM effluent.
机译：为了确定与二级处理纸浆和造纸厂（PPM）废水相关的底栖生物转化途径和碳的命运，向河口潮间带分别添加〜（13）C标记的活性污泥生物量（ASB）和浮游植物（PHY）。在超过28天的时间里，〜（13）C被追踪到沉积物中的有机碳，动物区系，海草，细菌和微植物底栖动物，以及被淹没的沉积物中溶解的有机碳（DOC）和溶解的无机碳（DIC）的通量以及二氧化碳（CO_2（g））。与ASB（〜75％）相比，沉积物中的PHY碳去除率更高（28天为〜85％）。尽管PHY和ASB的〜（13）C损失相似通过DIC（分别为58％和56％）和CO_2（g）通量（＜1％）绘制的图，DOC通量对PHY（41％）比ASB（12％）更重要。更快的向下运输和损失表明动物群由于其不稳定性和/或与ASB相关的毒素，更喜欢PHY；二级处理的PPM废水的氧气需求量低于一级处理的废水，但ASB的积累可能导致沉积物缺氧，ASB和PHY衍生的DOC的呼吸作用可能使水柱更具异养性。强调需要优化二次处理工艺，以控制与PPM废水相关的有机碳的质量和数量。

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  • 来源
    《Environmental Science & Technology》 |2013年第23期|13258-13265|共8页
  • 作者

    Joanne M.Oakes; Donald J.Ross; Bradley D.Eyre;

  • 作者单位

    Centre for Coastal Biogeochemistry,Southern Cross University,Military Road,Lismore,New South Wales 2480,Australia;

    Institute for Marine and Antarctic Studies,University of Tasmania,Private Bag 49,Hobart,Tasmania 7001,Australia;

    Centre for Coastal Biogeochemistry,Southern Cross University,Military Road,Lismore,New South Wales 2480,Australia;

  • 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);
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