This study aimed to assess the concentrations of eight trace metals – Cr, As, Pb, Mn, Ni, Zn, Hg, and Co – in the intertidal zone of Cox's Bazar of Bangladesh, the world's longest continuous beach. Most metal concentrations were below sediment quality guidelines and other comparative studies. The mean metal concentrations (mg kg−1) were as follows: Mn (471.67) > Zn (256.35) > Cr (89.96) > Pb (39.66) > Ni (36.44) > As (18.79) > Co (11.08) > Hg (0.0036). Statistical analyses revealed that only samples collected from stations 5 and 7 presented any cause for concern. Risk assessment indices, i.e., Geo-accumulation Index (Igeo), Contamination Factor (CF), Pollution Load Index (PLI), Potential Ecological Risk Index (PERI), and Toxic Risk Index (TRI), all indicated a low to moderate risk of pollution for all sites, suggesting that the study area is currently free from any significant negative impacts resulting from human activities. The calculated Hazard Index (HI) was <1, indicating no significant non-carcinogenic impact on adults or children. The Total Carcinogenic Risk was also well below the threshold value.

中文翻译：

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首次评估孟加拉国科克斯巴扎尔世界上最长的连续海滩潮间带的微量金属


这项研究旨在评估世界上最长的连续海滩孟加拉国科克斯巴扎尔潮间带中八种微量金属（铬、砷、铅、锰、镍、锌、汞和钴）的浓度。大多数金属浓度低于沉积物质量指南和其他比较研究。平均金属浓度（mg kg−1）如下： Mn (471.67) > Zn (256.35) > Cr (89.96) > Pb (39.66) > Ni (36.44) > As (18.79) >钴 (11.08)> 汞 (0.0036)。统计分析显示，只有从 5 号和 7 号站采集的样本才值得关注。风险评估指数，即地累积指数（Igeo）、污染因子（CF）、污染负荷指数（PLI）、潜在生态风险指数（PERI）和毒性风险指数（TRI）均显示为低至中度风险所有地点的污染情况，表明研究区域目前没有受到人类活动造成的任何重大负面影响。计算出的危害指数（HI）为<1，表明对成人或儿童没有显着的非致癌影响。总致癌风险也远低于阈值。