红海 Nabq 保护区沉积物中金属的化学形态和综合风险评估：个体和协同指数的应用。
Chemical speciation and comprehensive risk assessment of metals in sediments from Nabq protectorate, the Red Sea using individual and synergistic indices.
机构信息
Department of Marine Ecology, Faculty of Aquaculture and Marine Fisheries, Arish University, Egypt.
Department of Aquatic Environment, Faculty of Fish Resources, Suez University, Egypt; Department of Chemistry, College of Science, Qassim University, Buraidah, Saudi Arabia.
出版信息
Mar Pollut Bull. 2024 Apr;201:116219. doi: 10.1016/j.marpolbul.2024.116219. Epub 2024 Mar 13.
The study evaluates metal concentrations, distributions, contamination, risk, sources, fractionation, and mobility in Nabq Protectorate sediments, revealing a metal content order of Fe, Mn, Pb, Ni, and Cd. Metals are dominated by residual fractions, with Cd (83.70 %) > Ni (82.98 %) > Pb (80.96 %) > Fe (80.31 %) > Mn (76.65 %) reflecting the natural sources of investigated metals. Mn (23.35 %) was the most abundant mobile metal, and the sediments of the protectorate had low toxicity and moderate risk according to the synergistic indices (1 ≤ mRAC<10 and ERM; 5-10). The results from the proposed individual indices showed that Mn, Fe, and Pb are the most bioavailable (BI 0.1-0.4), Cd, Mn, Ni, Fe, and Pb are of moderate mobility (MI 0.1-0.4), and Cd is the most available (ARI 5-10), with Cd posing the most ecological risk. The total hazard quotient (THQ) for child was greater than one, exposure to manganese through ingestion and skin contact while swimming may endanger human health.
本研究评估了纳巴保护区沉积物中的金属浓度、分布、污染、风险、来源、形态和迁移性，揭示了铁、锰、铅、镍和镉的金属含量顺序。金属主要以残余态为主，其中 Cd（83.70%）>Ni（82.98%）>Pb（80.96%）>Fe（80.31%）>Mn（76.65%），反映了所研究金属的天然来源。Mn（23.35%）是最丰富的可移动金属，根据协同指数（1≤mRAC<10 和 ERM；5-10），保护区的沉积物具有低毒性和中等风险。所提出的单个指数的结果表明，Mn、Fe 和 Pb 是最具生物可利用性的（BI 0.1-0.4），Cd、Mn、Ni、Fe 和 Pb 是中等迁移性的（MI 0.1-0.4），而 Cd 是最具生物可利用性的（ARI 5-10），其中 Cd 具有最大的生态风险。儿童的总危害商（THQ）大于 1，通过摄入和游泳时皮肤接触摄入锰可能会危害人类健康。
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