Department of Environmental Health Engineering, Faculty of Health, Sabzevar University of Medical Science, P.O. Box 319, Sabzevar, Khorasan Razavi, Iran.
Department of Environmental Sciences and Engineering, Hakim Sabzevari University, Sabzevar, Khorasan Razavi, Iran.
Mar Pollut Bull. 2018 Aug;133:741-749. doi: 10.1016/j.marpolbul.2018.06.030. Epub 2018 Jun 22.
This study's objectives were to evaluate the elements degree of contamination in the Tajan River and the status of contamination in this river for future ecotoxicology studies. Based on geo-accumulation index (I) and contamination factor (CF) indices, Cr, Mn, Fe, Ci, Ni and Zn showed low contamination levels at all stations, while Se showed a very high degree of contamination. Potential ecological risk factor (E) and risk index (RI) indices values showed low ecological risk for the river, and this was confirmed by the pollution load index (PLI) results as well as a comparison of the concentrations of these elements with the mean values of the earth's crust and sediments worldwide. Overall, the results showed that the river cannot be regarded as a contaminated river with respect to the elements studied (with the exception of selenium and arsenic) for ecotoxicology studies, but can be considered a reference river.
本研究的目的是评估塔扬河的污染程度，并为未来的生态毒理学研究评估该河的污染状况。根据地积累指数（I）和污染因子（CF）指数，Cr、Mn、Fe、Ci、Ni 和 Zn 在所有站点的污染水平都较低，而 Se 则表现出极高的污染程度。潜在生态风险因子（E）和风险指数（RI）指数值表明河流的生态风险较低，这一点也得到了污染负荷指数（PLI）结果以及与全球地壳和沉积物中这些元素浓度的比较的证实。总的来说，结果表明，就研究的元素（除硒和砷外）而言，该河不能被视为受污染的河流，可作为生态毒理学研究的参照河流。
