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首页> 外文期刊>European Journal of Medicinal Chemistry: Chimie Therapeutique >Accumulation and risk assessment of heavy metals employing species sensitivity distributions in Linggi River, Negeri Sembilan, Malaysia
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Accumulation and risk assessment of heavy metals employing species sensitivity distributions in Linggi River, Negeri Sembilan, Malaysia

机译：马来西亚尼克斯山米班岭吉河鉴敏感分布的重金属积累与风险评估

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摘要

The constant increase of heavy metals into the aqueous environment has become a contemporary global issue of concern to government authorities and the public. The study assesses the concentration, distribution, and risk assessment of heavy metals in freshwater from the Linggi River, Negeri Sembilan, Malaysia. Species sensitivity distribution (SSD) was utilised to calculate the cumulative probability distribution of toxicity from heavy metals. The aquatic organism's toxicity data obtained from the ECOTOXicology knowledgebase (ECOTOX) was used to estimate the predictive non-effects concentration (PNEC). The decreasing sequence of hazardous concentration (HC5) was manganese > aluminium > copper > lead > arsenic > cadmium > nickel > zinc > selenium, respectively. The highest heavy metal concentration was iron with a mean value of 45.77 mu g L-1, followed by manganese (14.41 mu g L-1) and aluminium (11.72 mu g L-1). The mean heavy metal pollution index (HPI) value in this study is 11.52, implying low-level heavy metal pollutions in Linggi River. The risk quotient (RQ) approaches were applied to assess the potential risk of heavy metals. The RQ shows a medium risk of aluminium (RQ(m) = 0.1125) and zinc (RQ(m) = 0.1262); a low risk of arsenic (RQ(m) = 0.0122) and manganese (RQ(m) = 0.0687); and a negligible risk of cadmium (RQ(m) = 0.0085), copper (RQ(m) = 0.0054), nickel (RQ(m) = 0.0054), lead (RQ(m) = 0.0016) and selenium (RQ(m) = 0.0012). The output of this study produces comprehensive pollution risk, thus provides insights for the legislators regarding exposure management and mitigation.
机译：进入水环境的重金属不断增加已成为政府当局和公众关注的当代全球问题。该研究评估了马来西亚内格里-塞米兰灵吉河淡水中重金属的浓度、分布和风险评估。物种敏感性分布（SSD）用于计算重金属毒性的累积概率分布。从生态毒理学知识库（ECOTOX）获得的水生生物毒性数据用于估算预测无效应浓度（PNEC）。有害浓度（HC5）的下降顺序分别为锰>铝>铜>铅>砷>镉>镍>锌>硒。重金属浓度最高的是铁，平均值为45.77μg L-1，其次是锰（14.41μg L-1）和铝（11.72μg L-1）。本研究中的平均重金属污染指数（HPI）值为11.52，表明灵芝河的重金属污染水平较低。风险商（RQ）方法用于评估重金属的潜在风险。RQ显示铝（RQ（m）=0.1125）和锌（RQ（m）=0.1262）的中等风险；砷（RQ（m）=0.0122）和锰（RQ（m）=0.0687）的风险较低；镉（RQ（m）=0.0085）、铜（RQ（m）=0.0054）、镍（RQ（m）=0.0054）、铅（RQ（m）=0.0016）和硒（RQ（m）=0.0012）的风险可忽略不计。这项研究的结果产生了全面的污染风险，从而为立法者提供了有关暴露管理和缓解的见解。

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