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首页> 外文期刊>Environment and Pollution >Geochemical Assessment of Trace Metal Distribution and Contamination in the Surface Sediments of the Coast of Okinawa Island, Japan
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Geochemical Assessment of Trace Metal Distribution and Contamination in the Surface Sediments of the Coast of Okinawa Island, Japan

机译：日本冲绳岛海岸表层沉积物中痕量金属分布和污染的地球化学评估

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In this study, sediment samples were collected from the Awase tidal, the Minamigusuku, and Nakagusuku areas located in the Okinawa Island. The collected samples were analyzed using X-ray fluorescence to determine their geochemical compositions and distribution, and to assess the sediment quality in the study areas. Contamination factor (CF), geoaccumulation index (Igeo), and the United State Environmental Protection Agency Sediment Quality Guideline (US EPA SQG) were used to assess the sediment quality. The results show that the highest average concentrations of As (11mg/kg), Pb (8 mg/kg), Zn (19 mg/kg), Cu (6 mg/kg), and Cr (14mg/kg) occurred in the Minamigusuku area. The CF and Igeo values, and the US EPA SQG indicate that among the selected trace metals only As displays significant values in the study areas. The CF values of As in the Minamigusuku area show moderate enrichment, and in this same area, the Igeo values of As present significant values, ranging from moderate to considerable contaminations, implying a possible effect on the biota in this location. Compared to the US EPA SQG, the Awase tidal flat and Nakagusuku areas are moderately polluted, whereas Minamigusuku is heavily polluted, suggesting that As may possible impact the biota in these areas. Consequently, for a better sustainable development of the coast of Okinawa Island , a regular monitoring and assessment of study areas, particularly the Minamigusuku area, is necessary to determine over time the concentration of As.
机译：在这项研究中，沉积物样本是从冲绳岛的Awase潮汐，Minamigusuku和Nakagusuku地区收集的。使用X射线荧光分析收集的样品，以确定其地球化学组成和分布，并评估研究区域的沉积物质量。污染因子（CF），地质累积指数（Igeo）和美国环境保护局泥沙质量指南（US EPA SQG）用于评估泥沙质量。结果表明，烟叶中As（11mg / kg），Pb（8 mg / kg），Zn（19 mg / kg），Cu（6 mg / kg）和Cr（14mg / kg）的最高平均浓度最高。南区地区。 CF和Igeo值以及US EPA SQG表明，在选定的痕量金属中，只有As在研究区域显示出显着的值。在Minamigusuku地区，As的CF值显示出中等程度的富集，而在同一地区，As的Igeo值呈现出显着的值，范围从中度到相当大的污染，这暗示着可能对该位置的生物群产生影响。与美国EPA SQG相比，Awase滩涂和Nakagusuku地区受到中度污染，而Minamigusuku则受到严重污染，这表明As可能会影响这些地区的生物群。因此，为了更好地实现冲绳岛海岸的可持续发展，有必要定期对研究区域（特别是南古苏地区）进行监测和评估，以确定随时间推移砷的浓度。

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