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首页> 外文期刊>Marine pollution bulletin >Trace metal distribution in the sediment cores of mangrove ecosystems along northern Kerala coast, south-west coast of India
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Trace metal distribution in the sediment cores of mangrove ecosystems along northern Kerala coast, south-west coast of India

机译：沿着印度西南海岸北部喀拉拉邦海岸的红树林生态系统沉积物中的痕迹金属分布

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摘要

Core sediment samples were collected from five mangrove ecosystems along northern Kerala coast (Kunjimangalam: S1, Pazhayangadi: S2, Pappinissery: S3, Thalassery: S4, and Kadalundi: S5) to assess the status of heavy metal pollution. S1 recorded comparatively lower metal concentration at surface (except Pb) due to low organic content and sandy texture, while the reverse was true for S3. Higher metal contents were recorded at S5 (0-5 cm), which was attributed to its unique biogeochemical behavior. Enrichment factor and geoaccumulation index indicated moderate enrichment for Cd, and the pollution load index revealed progressive deterioration of sediment quality at S5 (0-5 cm). There was no harmful effect of trace metals on biological community (except Ni) according to Sediment Quality Guidelines. Major processes controlling trace metal accumulation in these systems are diagenetic processes, precipitation of heavy metals as sulfides, and the presence of Fe, Mn-oxy hydroxides, which act as adsorption sites for other metals.
机译：核心沉积物样品由沿喀拉拉邦北部的五种红树林生态系统收集（Kunjimangalam：S1，Pazhayangadi：S2，Pappinissery：S3，Thalassery：S4和KadaLundi：S5），以评估重金属污染的状态。由于低有机含量和砂质纹理，S1在表面（PB除外）的较低金属浓度相对较低，而S3的反向是正确的。在S5（0-5cm）上记录较高的金属内容物，其归因于其独特的生物地球化学行为。富集因子和地质累积指数表明CD的中等富集，污染载荷指数揭示了S5（0-5厘米）的沉积物质量的逐渐恶化。根据沉积物质量指南，痕量金属对生物群落（NI除外）没有有害影响。控制这些系统中痕量金属积聚的主要方法是成岩过程，重金属作为硫化物的沉淀，以及Fe，Mn-氧氢氧化物的存在，其作为其他金属的吸附位点。

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  • 来源
    《Marine pollution bulletin》 |2020年第4期|110946.1-110946.5|共5页
  • 作者

    Manju M. N.; Kumar C. S. Ratheesh; Resmi P.; Gireeshkumar T. R.; Joseph Manju Mary; Salas P. M.; Chandramohanakumar N.;

  • 作者单位

    Cochin Univ Sci & Technol Sch Marine Sci Dept Chem Oceanog Kochi 682016 Kerala India;

    Cochin Univ Sci & Technol Sch Environm Studies Kochi 682022 Kerala India;

    Kerala Univ Fisheries & Ocean Studies Aquat Environm & Management Panangad 682018 Kerala India;

    Natl Inst Oceanog Reg Ctr Kochi Dr Salim Ali Rd Kochi 682018 Kerala India;

    Cochin Univ Sci & Technol Sch Marine Sci Dept Chem Oceanog Kochi 682016 Kerala India;

    Cochin Univ Sci & Technol Sch Marine Sci Dept Chem Oceanog Kochi 682016 Kerala India;

    Interuniv Ctr Marine Biotechnol Sch Marine Sci CUSAT Kochi 682016 Kerala India;

  • 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

    Trace metals; Mangroves; Pollution; Core sediment;

    机译：痕量金属;红树林;污染;核心沉积物;

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