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首页> 外文期刊>Marine Environmental Research >CO2 leakage from carbon dioxide capture and storage (CCS) systems affects organic matter cycling in surface marine sediments
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CO2 leakage from carbon dioxide capture and storage (CCS) systems affects organic matter cycling in surface marine sediments

机译：二氧化碳捕集与封存（CCS）系统造成的CO2泄漏会影响海洋表层沉积物中的有机物循环

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摘要

Carbon dioxide capture and storage (CCS), involving the injection of CO2 into the sub-seabed, is being promoted worldwide as a feasible option for reducing the anthropogenic CO2 emissions into the atmosphere. However, the effects on the marine ecosystems of potential CO2 leakages originating from these storage sites have only recently received scientific attention, and little information is available on the possible impacts of the resulting CO2-enriched seawater plumes on the surrounding benthic ecosystem. In the present study, we conducted a 20-weeks mesocosm experiment exposing coastal sediments to CO2-enriched seawater (at 5000 or 20,000 ppm), to test the effects on the microbial enzymatic activities responsible for the decomposition and turnover of the sedimentary organic matter in surface sediments down to 15 cm depth. Our results indicate that the exposure to high-CO2 concentrations reduced significantly the enzymatic activities in the top 5 cm of sediments, but had no effects on subsurface sediment horizons (from 5 to 15 cm depth). In the surface sediments, both 5000 and 20,000 ppm CO2 treatments determined a progressive decrease over time in the protein degradation (up to 80%). Conversely, the degradation rates of carbohydrates and organic phosphorous remained unaltered in the first 2 weeks, but decreased significantly (up to 50%) in the longer term when exposed at 20,000 ppm of CO2. Such effects were associated with a significant change in the composition of the biopolymeric carbon (due to the accumulation of proteins over time in sediments exposed to high-pCO(2) treatments), and a significant decrease (-20-50% at 5000 and 20,000 ppm respectively) in nitrogen regeneration. We conclude that in areas immediately surrounding an active and long-lasting leak of CO2 from CCS reservoirs, organic matter cycling would be significantly impacted in the surface sediment layers. The evidence of negligible impacts on the deeper sediments should be considered with caution and further investigated simulating the intrusion of CO2 from a subsurface source, as occurring during real CO2 leakages from CCS sites. (C) 2016 Elsevier Ltd. All rights reserved.
机译：二氧化碳捕集与封存（CCS），涉及将二氧化碳注入海底，正在世界范围内推广，作为减少人为二氧化碳向大气排放的可行选择。但是，源自这些存储地点的潜在CO2泄漏对海洋生态系统的影响只是最近才受到科学关注，关于由此产生的富含CO2的海水羽流对周围底栖生态系统可能产生的影响的信息很少。在本研究中，我们进行了为期20周的中观试验，将沿海沉积物暴露于富含CO2的海水中（5000或20,000 ppm），以测试对微生物酶活性的影响，该酶负责分解和转化沉积有机物。表层沉积物深至15厘米深。我们的结果表明，暴露于高CO2浓度会显着降低顶部5 cm沉积物中的酶活性，但对地下沉积层（从5至15 cm深度）没有影响。在表层沉积物中，5000 ppm和20,000 ppm的CO2处理均确定了蛋白质降解随时间的推移逐渐降低（最高80％）。相反，在最初的两周内，碳水化合物和有机磷的降解率保持不变，但是在暴露于20,000 ppm的CO2的情况下，从长远来看，降解率却显着下降（最高50％）。此类影响与生物聚合碳的组成发生重大变化（由于蛋白质在经过高pCO（2）处理的沉积物中随时间的积累）以及显着下降（在5000和-20°C时为-20-50％）有关。在氮气再生中分别为20,000 ppm）。我们得出的结论是，在紧邻CCS储层活跃而持久的CO2泄漏的区域附近，有机物质循环将显着影响表层沉积物层。应谨慎考虑对较深沉积物影响可忽略不计的证据，并应进行进一步研究，以模拟二氧化碳从地下来源侵入，这是在CCS现场实际CO2泄漏期间发生的。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Marine Environmental Research》 |2016年第12期|158-168|共11页
  • 作者

    Rastelli Eugenio; Corinaldesi Cinzia; DellAnno Antonio; Amaro Teresa; Greco Silvestro; Lo Martire Marco; Carugati Laura; Queiros Ana M.; Widdicombe Stephen; Danovaro Roberto;

  • 作者单位

    Polytech Univ Marche, Dept Life & Environm Sci, I-60131 Ancona, Italy|Stn Zool Anton Dohrn, I-80121 Naples, Italy;

    Polytech Univ Marche, Dept Sci & Engn Mat, Environm & Urbanist, I-60131 Ancona, Italy;

    Polytech Univ Marche, Dept Life & Environm Sci, I-60131 Ancona, Italy;

    Stn Zool Anton Dohrn, I-80121 Naples, Italy|Norwegian Inst Water Res NIVA, Reg Off Bergen, N-5006 Bergen, Norway;

    Ist Super Ric Ambientale, ISPRA, Rome, Italy;

    Polytech Univ Marche, Dept Life & Environm Sci, I-60131 Ancona, Italy|Ecoreach Srl, Corso Stamira 61, I-60122 Ancona, Italy;

    Polytech Univ Marche, Dept Life & Environm Sci, I-60131 Ancona, Italy|CoNISMa, Piazzale Flaminio 9, I-00197 Rome, Italy;

    Plymouth Marine Lab, Prospect Pl, Plymouth PL1 3DH, Devon, England;

    Plymouth Marine Lab, Prospect Pl, Plymouth PL1 3DH, Devon, England;

    Polytech Univ Marche, Dept Life & Environm Sci, I-60131 Ancona, Italy|Stn Zool Anton Dohrn, I-80121 Naples, Italy;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Carbon storage; Seawater acidification; CO2 impact on benthos; Remineralization; Biogeochemical cycles;

    机译：碳储存;海水酸化;CO2对底栖生物的影响;再矿化;生物地球化学循环;

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