中国典型养殖海湾大亚湾表层沉积物中黑碳的来源、埋藏通量和质量存量。
Sources, burial flux and mass inventory of black carbon in surface sediments of the Daya Bay, a typical mariculture bay of China.
机构信息
Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China.
Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Natural Resources, Shenzhen 518000, China.
出版信息
Mar Pollut Bull. 2022 Jun;179:113708. doi: 10.1016/j.marpolbul.2022.113708. Epub 2022 May 6.
The contents of chemothermal oxidation (CTO)-derived black carbon (BC) and organic carbon (OC) and their stable isotopes (δC and δC), including major elemental oxides, and grain sizes were measured to constrain the sources, burial flux, and mass inventory of BC in surface sediments of the Daya Bay. Surface sediments were mainly clayey silt (>90%) and contained 0.28-1.18% OC and 0.05-0.18% BC. Fossil fuel emission and physical erosion contributed to the sedimentary BC sources. High BC/OC ratio (6-30%), burial flux (154.88-922.67 μg cm y), and mass inventory (22-34 Gg y) of BC in the upper 5 cm of surface sediments indicated that the Daya Bay is a significant sink of BC. The high accumulation of BC in sediments is attributed to a strong affinity to fine-grained sediments due to the enrichment of muddy biodeposits excrements from the cultured species in the bay.
测定了热化学氧化 (CTO) 衍生黑碳 (BC) 和有机碳 (OC) 及其稳定同位素 (δC 和 δC) 的含量，包括主要元素氧化物和粒度，以约束表层沉积物中 BC 的来源、埋藏通量和质量存量。表层沉积物主要为粉质粘土 (>90%)，含有 0.28-1.18% OC 和 0.05-0.18% BC。化石燃料排放和物理侵蚀是沉积物中 BC 的来源。表层沉积物中上层 5cm 处的高 BC/OC 比 (6-30%)、埋藏通量 (154.88-922.67μgcm y) 和质量存量 (22-34Gg y) 表明大亚湾是 BC 的重要汇。沉积物中 BC 的高积累归因于与细颗粒沉积物的强烈亲和力，这是由于海湾中养殖物种的泥质生物沉积物排泄物的富集。
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