Metals in coastal groundwater systems under anthropogenic pressure: a synthesis of behavior, drivers, and emerging threats

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Tristan McKenzie, Amy Moody, João Barreira, Xiaoyi Guo, Anael Cohen, Stephanie J. Wilson, Murugan Ramasamy
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Abstract

Submarine groundwater discharge (SGD) dynamically links land- and ocean-derived chemical constituents, such as metals, in the coastal ocean. While many metals are sediment-bound, changing environmental conditions, particularly along the coast, may lead to increased release of metals to their dissolved and more bioavailable form. Here, we review metal behavior, speciation, and drivers of mobilization in the coastal environment under anthropogenic influence. We also model global metal contamination risk to the coastal ocean via SGD considering anthropogenic and hydrogeologic pressures, where tropical regions with high population density, SGD, and acid sulfate soils (4% of the global coast) present the highest risk. Although most SGD studies focus on other analytes, such as nutrients, this review demonstrates the importance of considering SGD as a critical pathway for metals to reach the coastal ocean under rapidly changing environmental conditions.

Abstract Image

人为压力下沿海地下水系统中的金属:行为、驱动因素和新威胁综述
海底地下水排放(SGD)将沿岸海洋中来自陆地和海洋的化学成分(如金属)动态地 联系起来。虽然许多金属是与沉积物结合在一起的,但环境条件的变化,特别是沿岸环境条件的变化,可能会导致更多的金属以溶解和生物可利用的形式释放出来。在此,我们回顾了在人为影响下沿岸环境中的金属行为、种类和迁移动因。考虑到人为和水文地质压力,我们还模拟了全球沿岸海洋受 SGD 污染的金属风 险,其中人口密度高的热带地区、SGD 和酸性硫酸盐土壤(占全球海岸的 4%)风险最大。虽然大多数 SGD 研究都集中在营养物质等其它分析物上,但本综述表明,在快速变化 的环境条件下,将 SGD 作为金属进入沿岸海洋的重要途径具有重要意义。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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