The Huaihe River has suffered increasing pressure from pollutants including metals from anthropogenic activities. In this study, enrichment and fractionation behavior of trace metals were analyzed in sediment samples obtained from fish spawning area of the Huaihe River (Anhui Section) to evaluate the potential ecological risk of trace metals to aquatic organisms. Geochemical indices including enrichment factor and geo-accumulation index as well as mean probable effect concentration quotient and risk assessment code were adopted to assess the contamination degree and potential ecological toxicity. Results showed that the total contents of Cu, Pb, Zn, Cr, Cd, As, and Hg in sediment were 23.1 ± 6.4, 32.3 ± 11.1, 76.8 ± 14.2, 84.6 ± 17.2, 0.2 ± 0.1, 9.0 ± 3.0, and 0.031 ± 0.010 mg/kg, respectively. The indexes EF and I_geo revealed slight accumulation for Pb, Zn, Cr, Cd, and As in some sampling sites. The result of Q_m-PEC demonstrated that trace metals in sediment were not toxic to aquatic organisms. Most trace metals appeared to mainly associate with the residual form suggesting lower mobility whereas Cd presented a relative higher exchangeable fraction indicating a great degree of bioavailability. The result of risk assessment code (RAC) evaluation revealed that Cd poses a medium ecological risk for aquatic organisms whereas most of the other trace metals pose low risks.

淮河遭受的压力包括人为活动产生的金属污染物。在这项研究中，分析了从淮河（安徽段）鱼类产卵区获得的沉积物样品中痕量金属的富集和分馏行为，以评估痕量金属对水生生物的潜在生态风险。采用地球化学指标，包括富集因子和地球累积指数，以及平均可能影响浓度商和风险评估代码，以评估污染程度和潜在的生态毒性。结果表明，沉积物中Cu，Pb，Zn，Cr，Cd，As和Hg的总含量分别为23.1±6.4、32.3±11.1、76.8±14.2、84.6±17.2、0.2±0.1、9.0±3.0和0.031分别为±0.010 mg / kg。索引EF和我_进行地理揭示了一些采样点为铅，锌，铬，镉，并且随着轻微的积累。Q _m-PEC的结果表明，沉积物中的痕量金属对水生生物无毒。多数痕量金属似乎主要与残留形式缔合，表明迁移率较低，而镉的相对交换率较高，表明其生物利用度较高。风险评估代码（RAC）评估的结果表明，镉对水生生物构成中等生态风险，而其他大多数痕量金属构成低风险。