Abstract This work studied the effects of nutrients on metal tolerance, removal efficiency, and metal accumulation in tissues of T. domingensis. This macrophyte was exposed to solutions of Cr(III) + Ni + Zn at extremely high concentrations. Treatments were metal combinations of 200 or 600 mg L−1 of each metal with and without nutrients (N and P). Treatment 600 exhibited significantly lower final metal removals than those of 200. The highest removal from water in all treatments was registered for Cr. Final Cr removal did not show significant differences between the treatments with and without nutrient addition. Sediment showed higher concentrations than plant tissues. Roots exhibited the highest Cr concentrations in tissues. In comparison with roots, leaves did not show significant differences in Ni and Zn concentrations, except for 200 and 200 + nutrient. Treatments with nutrient addition reached a significantly higher relative growth rate (RGR) than that obtained in treatments without nutrient addition. Treatments 600 and 600 + nutrients showed a significantly lower RGR than that of treatments 200 and 200 + nutrients. In Treatment 600 the lowest chlorophyll concentration was observed. T. domingensis demonstrated its ability to survive a fortuitous industrial dump of high metal concentrations in a treatment wetland.

中文翻译：

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多明香蒲暴露于高浓度多金属和营养溶液：耐受性和去除效率的研究

摘要 本工作研究了养分对多明金龟子组织中金属耐受性、去除效率和金属积累的影响。这种大型植物暴露于极高浓度的 Cr(III) + Ni + Zn 溶液中。处理是 200 或 600 mg L-1 每种金属的金属组合，有和没有营养物（N 和 P）。处理 600 的最终金属去除率明显低于 200。在所有处理中，Cr 的去除率最高。最终Cr去除在添加和不添加营养物的处理之间没有显示出显着差异。沉积物的浓度高于植物组织。根在组织中表现出最高的 Cr 浓度。与根相比，叶子的 Ni 和 Zn 浓度没有显着差异，除了200和200+营养素。与不添加营养物的处理相比，添加营养物的处理达到了显着更高的相对生长率 (RGR)。600 和 600 + 养分处理的 RGR 显着低于 200 和 200 + 养分处理。在处理 600 中观察到最低的叶绿素浓度。T. domingensis 证明了它能够在处理湿地中的高金属浓度的偶然工业垃圾场中存活下来。