Assessing Multiple Risks in Regulating Reservoirs: Perspectives on Heavy Metal Contamination.

ABSTRACT: As the terminal reservoir of the South-to-North Water Diversion's Eastern Route, Dongping Lake is critical for safeguarding the northern water supply. Analysis of 33 water-sediment sites revealed the following. (1) Waterborne heavy metals (HMs) below WHO limits, confirming the good water quality. (2) Sediment HM enrichment exceeding background levels, with Cd posing high ecological risk (mean E_r = 135), and moderate overall pollution. (3) Speciation showed V, Cr, Co, Ni, Cu, Zn, and Pb predominantly in residual fractions, while Cd exhibited high bioavailability and Pb was in reducible state. Ecological risk assessment indicated that V and Cr tend not to cause environmental pollution; Co, Ni, Cu, Zn, and Pb only cause slight pollution; and Cd causes serious point-source po

SUBMITTER: Zhou H 

PROVIDER: S-EPMC12474066 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature