IRON-SULFUR-MANGANESE DYNAMICS IN INTERTIDAL SURFACE SEDIMENTS OF THE NORTH SEA
IRON-SULFUR-MANGANESE DYNAMICS IN INTERTIDAL SURFACE SEDIMENTS OF THE NORTH SEA
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北海潮间带表面沉积物中的铁-硫-锰动力学
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
B. Jørgensen
中科院分区：
文献类型：
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作者：
K. Bosselmann;M. Böttcher;M. Billerbeck;E. Walpersdorf;A. Theune;M. Huettel;B. Jørgensen
在沿海海洋沉积物中，微生物利用氧、硝酸盐、锰和铁的氧化物和硫酸盐作为末端电子受体（例如，硝酸盐）催化有机物的分解。例如，在一个实施例中，FROELICH等人，1979; JORGENSEN，2000）。高达50%以上的氧化过程与微生物硫酸盐还原有关。许多复杂的微生物和非生物反应通常发生在海洋表层沉积物中。潮间表层沉积物是研究动力学边界条件对早期成岩地球化学元素转化及其对沉积物-水界面元素迁移的影响的理想场所。本文主要研究了不同季节潮间带表层沉积物中氧、锰、铁和硫的耦合地球化学循环的动态反应。其主要目的是增加我们对元素动力学及其与因素的关系的理解，如，e。例如，在一个实施例中，沉积物类型（以及相应的有机物和金属负载）、温度和水动力学。主要的兴趣是在不同类型的潮间带沉积物中的锰，铁和硫的动态控制因素。在早期成岩作用期间，锰（IV）和铁（III）（羟基）氧化物可以通过各种氧化还原过程（例如：例如，在一个实施例中，THAMDRUP等人，1994;坎菲尔德等人，1993年），并因此，重要的物质和能量流。在潮汐周期、昼夜变化和季节变化的时间尺度上，研究了沉积物中氧、硫、碳、锰和铁耦合循环的地球化学反应动力学。调查是在现场（原位）以及通过实验室培养进行的。通常对沉积物芯和间隙沃茨水进行分析，深度约为20厘米。
In coastal marine sediments the decomposition of organic matter is catalyzed by microorganisms using oxygen, nitrate, manganese and iron(oxyhydr)oxides and sulfate as the terminal electron acceptors (e. g., FROELICH et al., 1979; JORGENSEN, 2000). Up to more than 50% of the oxidation processes are related to microbial sulfate reduction. A number of complex microbial and non-biological reactions typically takes place in marine surface sediments. Intertidal surface sediments are the ideal sites to study the influence of dynamic boundary conditions on early diagenetic biogeochemical element transformations and their impact on the element transfers across the sediment-water interface. The present study concentrates on the dynamic reactions within the coupled biogeochemical cycles of oxygen, manganese, iron and sulfur in different intertidal surface sediments on a seasonal basis. The main purpose was to increase our understanding of element dynamics and their relation to factors like, e. g., sediment type (and corresponding organic matter and metal load), temperature, and hydrodynamics. The main interest was in the factors controlling the dynamics of manganese, iron and sulfur in different types of intertidal sediments. During early diagenesis, manganese(IV) and iron(III)(oxyhydr)oxides can be reduced and recirculated through various redox processes (e. g., THAMDRUP et al., 1994; CANFIELD et al., 1993) and are, therefore, important for material and energy flow. Measurements were carried out to investigate the dynamics of biogeochemical reactions within the coupled sedimentary oxygen, sulfur, carbon, manganese and iron cycles on the time scales of tidal cycles, day-night changes and seasons. The investigations were carried out in the field (in situ) as well as by laboratory incubations. Sediment cores and interstitial waters were typically analyzed down to about 20 cm depth.