Department of Environmental Sciences, Hakim Sabzevari University, 379 post box, 9617916487 Sabzevar, Khorasan Razavi, Iran.
Mar Pollut Bull. 2017 Apr 15;117(1-2):547-553. doi: 10.1016/j.marpolbul.2017.02.035. Epub 2017 Feb 21.
The major objectives of the study were to test the hypothesis of the Zarrin-Gol River as a reference site for ecotoxicological studies and to assess the contamination degree of heavy metals and metalloids in the river using four contamination indices. For these purposes, eleven heavy metal and metalloid concentrations were analyzed. The average concentrations (mgkg) in the sediments were: 37.67 (chromium) 286.28 (manganese), 13,751.04 (iron), 8.79 (cobalt), 12.39 (nickel), 32.68 (zinc), 21.91 (arsenic), 40.59 (selenium), 2923.86 (aluminum), ND (silver) and 785.96 (magnesium). Contamination factor, enrichment factor, pollution load index, and geoaccumulation index were calculated to evaluate the contamination degree and influence of human activities on heavy metal levels. The contamination indices of the sediment samples showed that arsenic and selenium were the highest pollutants. The results indicated that the Zarrin-Gol River could not be used as a reference site at least for arsenic and selenium.
本研究的主要目的是验证扎林戈勒河作为生态毒理学研究参照点的假设,并使用四种污染指数评估河流中重金属和类金属的污染程度。为此,分析了 11 种重金属和类金属的浓度。沉积物中的平均浓度(mgkg)为:37.67(铬)、286.28(锰)、13.751.04(铁)、8.79(钴)、12.39(镍)、32.68(锌)、21.91(砷)、40.59(硒)、2923.86(铝)、ND(银)和 785.96(镁)。为了评估污染程度和人类活动对重金属水平的影响,计算了污染因子、富集因子、污染负荷指数和地积累指数。沉积物样品的污染指数表明,砷和硒是最高的污染物。结果表明,扎林戈勒河至少不能用作砷和硒的参照点。