Radioactive and Chemical Pollution Evaluation in Coastal Sea Sediments

Francesco Caridi, G. Paladini, A. Belvedere, M. D’Agostino, S. Marguccio, M. Messina, G. Belmusto, Giovanna Stilo, V. Venuti, D. Majolino
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Abstract

In this article, coastal sea sediments from three different selected sites of Reggio Calabria and Vibo Valentia districts, Calabria region, Southern Italy, were picked up to quantify natural and anthropogenic radioactivity content and metal concentrations. The aim was to assess any possible radiological health hazard for human beings due to external exposure to gamma rays, as well as the level of pollution due to anthropic radionuclides and metals in the investigated area. To this purpose, High Purity Germanium (HPGe) gamma spectrometry was employed to quantify specific activities of 226Ra, 232Th, 40K, and 137Cs radioisotopes. The absorbed gamma dose rate in air (D), the annual effective dose equivalent (AEDE) outdoors, the external hazard index (Hex) and the excess lifetime cancer risk (ELCR) were also estimated to assess any possible radiological health risk for the population, mainly due to the use of coastal sea sediments for the beach nourishment. Moreover, Inductively Coupled Plasma Mass Spectrometry (ICP-MS) measurements were carried out for the quantitative elemental analysis of the samples, to assess any possible chemical pollution by metals, that could be released into the environment by both natural and anthropogenic sources, through a comparison with the limits set by the Italian Legislation. Finally, the results reported in this paper can be used as a baseline for future investigations concerning a more complete mapping of the radioactivity levels in coastal sea sediments.
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近海沉积物中的放射性和化学污染评估
本文选取意大利南部卡拉布里亚地区雷焦卡拉布里亚和维博瓦伦提亚三个不同地点的沿海海洋沉积物,量化了自然和人为的放射性含量和金属浓度。其目的是评估由于外部暴露于伽马射线而可能对人类健康造成的任何放射性危害,以及调查地区因人为放射性核素和金属造成的污染程度。为此,采用高纯锗(HPGe)伽马能谱法测定了226Ra、232Th、40K和137Cs放射性同位素的比活度。还估计了空气中吸收的伽马剂量率(D)、室外的年有效剂量当量(AEDE)、外部危害指数(Hex)和过量终身癌症风险(ELCR),以评估主要由于使用沿海海洋沉积物作为海滩营养物而对人口造成的任何可能的放射性健康风险。此外,还进行了电感耦合等离子体质谱(ICP-MS)测量,对样品进行定量元素分析,通过与意大利立法规定的限值进行比较,评估任何可能由自然和人为来源释放到环境中的金属化学污染。最后,本文报告的结果可以作为未来调查更完整地绘制沿海海洋沉积物放射性水平的基线。
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CiteScore
1.90
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0.00%
发文量
118
期刊介绍: WSEAS Transactions on Environment and Development publishes original research papers relating to the studying of environmental sciences. We aim to bring important work to a wide international audience and therefore only publish papers of exceptional scientific value that advance our understanding of these particular areas. The research presented must transcend the limits of case studies, while both experimental and theoretical studies are accepted. It is a multi-disciplinary journal and therefore its content mirrors the diverse interests and approaches of scholars involved with sustainable development, climate change, natural hazards, renewable energy systems and related areas. We also welcome scholarly contributions from officials with government agencies, international agencies, and non-governmental organizations.
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