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首页> 外文期刊>Environmental Science & Technology >CO_2 Outgassing from an Urbanized River System Fueled by Wastewater Treatment Plant Effluents
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CO_2 Outgassing from an Urbanized River System Fueled by Wastewater Treatment Plant Effluents

机译：废水处理厂废水推动的城市化河系中的CO_2排放

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摘要

Continuous underway measurements were combined with a basin-scale survey to examine human impacts on CO_2 outgassing in a highly urbanized river system in Korea. While the partial pressure of CO_2 (pCO_2) was measured at 15 sites using syringe equilibration, 3 cruises employing an equilibrator were done along a 30 km transect in the Seoul metropolitan area. The basin-scale survey revealed longitudinal increases in surface water pCO_2 and dissolved organic carbon (DOC) in the downstream reach. Downstream increases in pCO_2, DOC, fluorescence index, and inorganic N and P reflected disproportionately large contributions from waste-water treatment plant (WWTP) effluents carried by major urban tributaries. Cruise transects exhibited strong localized peaks of pCO_2 up to 13 000 μatm and ~(13)CO_2 enrichment along the confluences of tributaries at an average flow, whereas CO_2 pulses were dampened by increased flow during the monsoon period. Fluctuations in pCO_2 along the eutrophic reach downstream of the confluences reflected environmental controls on the balance between photosynthesis, biodegradation, and outgassing. The results underscore WWTP effluents as an anthropogenic source of nutrients, DOC, and CO_2 and their influences on algal blooms and associated C dynamics in eutrophic urbanized river systems, warranting further research on urbanization-induced perturbations to riverine metabolic processes and carbon fluxes.
机译：连续进行的测量与流域规模的调查相结合，以检验人类对韩国高度城市化的河流系统中CO_2排放的影响。虽然使用注射器平衡在15个位置测量了CO_2（pCO_2）的分压，但在首尔市区30公里的样带上进行了3次使用平衡器的巡航。流域规模调查显示，下游河段的地表水pCO_2和溶解的有机碳（DOC）呈纵向增加。下游pCO_2，DOC，荧光指数以及无机N和P的增加反映了主要城市支流携带的废水处理厂（WWTP）废水的贡献过大。克鲁斯断面显示出pCO_2的强局部峰，最高为13000μatm，在支流汇流处平均流量处〜（13）CO_2富集，而季风期间，CO_2脉冲被流量增加而衰减。 pCO_2沿富营养化的波动到达汇合处的下游，反映了环境对光合作用，生物降解和除气之间平衡的控制。该结果强调了污水处理厂污水是人为的养分，DOC和CO_2的来源，以及它们对富营养化城市化河流系统中藻华和相关碳动态的影响，因此有必要进一步研究城市化引起的对河流代谢过程和碳通量的扰动。

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  • 来源
    《Environmental Science & Technology》 |2017年第18期|10459-10467|共9页
  • 作者

    Tae Kyung Yoon; Hyojin Jin; Most Shirina Begum; Namgoo Kang; Ji-Hyung Park;

  • 作者单位

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea;

    Center for Gas Analysis, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea,Science of Measurement, University of Science and Technology, KRISS Campus, Daejeon 34113, Republic Korea;

    Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea;

  • 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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