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Effect of a tropical cyclone on the distribution of heavy metals in the marine sediments off Kameswaram, Southeast coast of India
Marine Pollution Bulletin ( IF 5.8 ) Pub Date : 2021-07-22 , DOI: 10.1016/j.marpolbul.2021.112741
V Gopal 1 , R R Krishnamurthy 1 , T Sreeshma 1 , Prasenjeet Chakraborty 1 , C Sabari Nathan 1 , R Kalaivanan 2 , R Anshu 3 , N S Magesh 4 , M Jayaprakash 1
Affiliation  

Cyclones and heavy rainfalls are the main reasons for incessant environmental aggravation in the coastal regions and the distribution of pollutants from the contaminated terrestrial areas to the offshore regions. Twenty-five surface sediment samples were collected off Kameswaram, SE coast of India, and assessed for their geochemical and sedimentological characteristics post Cyclone Gaja. Sediment texture and various geochemical analyses were carried out to assess the metal distribution in the study area. Environmental impacts caused by heavy metal contamination in the marine sediments were assessed using different sediment pollution indices and it was found that metals such as Cu, Zn, Ni, and Co were moderately contaminated. Fe and Cr were uncontaminated to moderately contaminated, and Mn fall under the uncontaminated category. Multivariate statistical analyses revealed that the enrichment of organic-rich mud helps in entrapping the heavy metals, thus polluting the environment. Moreover, these metals were mainly derived from anthropogenic activities.



中文翻译:

热带气旋对印度东南沿海 Kameswaram 海域沉积物中重金属分布的影响

气旋和强降雨是沿海地区环境不断恶化和污染物从陆地污染区向近海地区分布的主要原因。在印度东南海岸 Kameswaram 附近收集了 25 个表层沉积物样本,并评估了它们在飓风 Gaja 之后的地球化学和沉积学特征。进行了沉积物质地和各种地球化学分析,以评估研究区的金属分布。使用不同的沉积物污染指数评估了海洋沉积物中重金属污染对环境的影响,发现铜、锌、镍和钴等金属受到中度污染。Fe 和 Cr 为未污染至中度污染,Mn 属于未污染类别。多元统计分析表明,富含有机质泥浆的富集有助于捕获重金属,从而污染环境。此外,这些金属主要来自人类活动。

更新日期:2021-07-23
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