制定管理策略以保障公众健康和环境可持续性,需要全面了解痕量金属和碱金属在海水泛滥时的溶解度和流动性。这项研究调查了海水泛滥的影响,随着洪水的持续时间,关于痕量和碱金属(Mn,Fe,Cu,Zn,Ca,K,和Mg)在佛罗里达州南部的两种钙质土壤(Krome和Biscayne)中。海水淹没实验涉及两种土壤类型和四个洪水持续时间(1、7、14和28天),重复了三次。还进行了淡水驱油实验以进行比较。每次洪水实验后,在三个深度(15、30和45cm)收集土壤样品,并分析样品的选定土壤参数。对比分析表明,海水淹没显着增加锰,Fe,与淡水洪水相比,两种土壤中的锌含量。在大多数情况下,早在1天暴露于海水泛滥时就明显增加,随着洪水持续时间进一步增加。然而,海水淹没的影响在两种土壤之间存在显着差异。海水淹没在Krome土壤中,28天,锰含量高58、340和510%,Fe,和锌含量与淡水洪水相比,而比斯坎湾土壤的相应增加分别为3.3、130和180%,分别。两种土壤的Cu含量均有相当的边际增加。同样,海水淹没增加了K,Mg,和单日洪水中的Na含量。土壤类型之间的相互作用,柱深度,洪水持续时间,它们的相互作用证明了决定锰的影响因素,Fe,Cu,和锌释放,通常在洪水的第28天和底部深度观察到峰值水平。总的来说,这些发现强调了这些金属的释放,引起人们对潜在的植物毒性以及由于浸出和径流引起的地下水或地表水污染的担忧。
Developing management strategies to safeguard public health and environmental sustainability requires a comprehensive understanding of the solubility and mobility of trace and alkaline metals in the event of seawater flooding. This study investigated the effects of seawater flooding, along the duration of flooding, on the release of trace and alkaline metals (Mn, Fe, Cu, Zn, Ca, K, and Mg) in two calcareous soils (Krome and Biscayne) located in southern Florida. Seawater flooding experiments involved two soil types and four flooding durations (1, 7, 14, and 28 days) replicated three times. Freshwater flooding experiments were also conducted for comparison. After each flooding experiment, soil samples were collected at three depths (15, 30, and 45 cm), and analyzed for selected elements. Comparative analysis revealed significant releases of Mn, Fe, and Zn in both soils flooded by seawater compared to freshwater. In most cases, significant increments were evident as early as 1-day exposure to seawater flooding, which further increased with flooding duration. However, the impacts of seawater flooding had notable differences between the two soils. Seawater flooding in Krome soil for 28 days, resulted in higher Mn, Fe, and Zn contents by 58, 340, and 510% compared with freshwater flooding, while corresponding increases in Biscayne soil were 3.3, 130, and 180%, respectively. Comparable marginal increases in Cu content were observed for both soils. Similarly, seawater flooding increased K, Mg, and Na contents from single-day flooding. The interplay between soil type, column depth, flooding duration, and their interactions proved influential factors in determining Mn, Fe, Cu, and Zn releases, with peak levels typically observed on the 28th day of flooding and at bottom depths. Overall, these findings highlight the release of these elements, raising concerns about potential plant toxicity and groundwater or surface water contamination due to leaching and runoff.