School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei, 230601, Anhui, China.
School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei, 230601, Anhui, China; School of Biological and Environmental Engineering, Chaohu University, Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, Chaohu, 238000, China.
J Environ Manage. 2024 Mar;354:120436. doi: 10.1016/j.jenvman.2024.120436. Epub 2024 Feb 22.
Understanding the nitrogen and sulfur uptake strategies of mine plants, including sources and preferences for nitrogen forms (ammonium nitrogen (NH) vs nitrate nitrogen (NO)), is critical to improving understanding of the role of plants in participating in the biogeochemical cycles of nitrogen and sulfur in mining areas. In this study, the stable N and S isotopic compositions of two species of aquatic plants (calamus and reed) in Linhuan mining area were analyzed to determine their absorption strategies for different nitrogen and sulfur sources. The results showed that river water was the largest source of nitrogen and sulfur, contributing 54.6% and 53.9% respectively. NO is the main form of nitrogen uptake by reed and calamus, followed by NH. In order to adapt to the change of nitrogen form in the environment, reed and calamus tend to absorb and utilize NO to maintain their absorption of nitrogen. Mine effluents from mining activities provide at least 12.9% and 16.8% sulfate to reed and calamus respectively, and the effect of mine effluents on reed and calamus sulfur has been underestimated. This study reveals the key factors controlling plant isotope composition, and the use of nitrogen and sulfur isotope composition of aquatic plants can help quantify the level of influence of mining activities, and understand the biogeochemical cycle of nitrogen and sulfur in mining areas.
了解矿区植物的氮、硫吸收策略，包括氮（铵氮 (NH) 与硝氮 (NO)）的来源和偏好，对于提高对植物在矿区氮、硫生物地球化学循环中所起作用的认识至关重要。本研究通过分析濉涣矿区两种水生植物（菖蒲和芦苇）的稳定氮、硫同位素组成，来确定它们对不同氮、硫源的吸收策略。结果表明，河水是氮、硫的最大来源，分别贡献了 54.6%和 53.9%。芦苇和菖蒲主要吸收利用硝氮（NO）和铵氮（NH）来吸收氮，其中 NO 是芦苇和菖蒲吸收氮的主要形态。为了适应环境中氮形态的变化，芦苇和菖蒲倾向于吸收和利用 NO 来维持其对氮的吸收。采矿活动产生的矿尾水至少为芦苇和菖蒲分别提供了 12.9%和 16.8%的硫酸盐，而矿尾水对芦苇和菖蒲的硫的影响被低估了。本研究揭示了控制植物同位素组成的关键因素，水生植物氮、硫同位素组成的利用有助于量化采矿活动的影响程度，了解矿区氮、硫的生物地球化学循环。
