Performance of heavy metals in the intertidal zone surface sediments of the Yellow River Estuary under water-sediment regulation scheme.

IF 4.9 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Marine pollution bulletin Pub Date : 2025-12-01 Epub Date: 2025-08-16 DOI:10.1016/j.marpolbul.2025.118592

Shan Shan Liu, Jin Ming Song, Xue Gang Li, Hua Mao Yuan, Li Qin Duan, Jun Ma, Feng Min Pan, Jian Wei Xing, Chen Long Feng, De Tong Tian, Zhi Bo Wang, Rui Wang

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Abstract

This study investigates the distribution, sources, and ecological risks of heavy metals (Cr, Cu, Zn, Cd, Pb, and Hg) and metalloid (As) in surface sediments of the Yellow River Estuary intertidal zone during the 2023 water-sediment regulation scheme (WSRS) period (summer) and the non-WSRS period (autumn). The results revealed that metal accumulation in both periods was primarily controlled by the co-adsorption of organic matter and fine particles. Hydrodynamic enhancement during the WSRS period reduced metal accumulation through sediment flushing and dilution, whereas weakened flows in the non-WSRS period promoted metal buildup. Assessment based on the geo-accumulation index (I_geo) and ecological risk index (RI) showed low risks for Cr, Cu, Zn, As, and Pb, while Cd and Hg posed moderate risks. Overall, the ecological risks in the study area remained within a low-risk range. The study highlights WSRS influences on heavy metal behavior and provides a basis for estuarine pollution assessment.

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水沙调节方案下黄河口潮间带表层沉积物重金属表现

研究了2023年水沙调节方案（WSRS）实施期（夏季）和非WSRS实施期（秋季）黄河口潮间带表层沉积物中重金属（Cr、Cu、Zn、Cd、Pb、Hg）和类金属（As）的分布、来源及生态风险。结果表明，两个时期的金属富集主要受有机质和细颗粒的共同吸附控制。水动力增强在WSRS期间通过冲刷和稀释减少了金属的积累，而在非WSRS期间水流减弱则促进了金属的积累。基于地质累积指数（Igeo）和生态风险指数（RI）的评价显示，Cr、Cu、Zn、As和Pb的风险较低，Cd和Hg的风险中等。总体而言，研究区生态风险处于低风险范围。该研究突出了WSRS对重金属行为的影响，为河口污染评价提供了依据。

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.