Química Analítica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000, Santa Fe, Argentina.
Arch Environ Contam Toxicol. 2010 Apr;58(3):666-75. doi: 10.1007/s00244-009-9454-0. Epub 2009 Dec 30.
Typha domingensis had become the dominant species after 2 years of operation of a wetland constructed for metallurgical effluent treatment. Therefore, the main purpose of this study was to investigate its ability to tolerate the effluent and to maintain the contaminant removal efficiency of the constructed wetland. Plant, sediment, and water at the inlet and outlet of the constructed wetland and in two natural wetlands were sampled. Metal concentration (Cr, Ni, and Zn) and total phosphorus were significantly higher in tissues of plants growing at the inlet in comparison with those from the outlet and natural wetlands. Even though the chlorophyll concentration was sensitive to effluent toxicity, biomass and plant height at the inlet and outlet were significantly higher than those in the natural wetlands. The highest root and stele cross-sectional areas, number of vessels, and biomass registered in inlet plants promoted the uptake, transport, and accumulation of contaminants in tissues. The modifications recorded accounted for the adaptability of T. domingensis to the conditions prevailing in the constructed wetland, which allowed this plant to become the dominant species and enabled the wetland to maintain a high contaminant retention capacity.
经过 2 年的冶金废水处理湿地运行，香蒲domingensis 已成为优势物种。因此，本研究的主要目的是研究其耐受废水的能力，并保持人工湿地的污染物去除效率。采集了人工湿地进水口和出水口以及两个自然湿地的植物、沉积物和水样本。与出水口和自然湿地的植物相比，进水口处植物组织中的金属浓度（Cr、Ni 和 Zn）和总磷明显更高。尽管叶绿素浓度对废水毒性敏感，但进水口和出水口处的生物量和株高明显高于自然湿地。在进水口处，最高的根和中柱横截面积、导管数量和生物量促进了污染物在组织中的吸收、运输和积累。记录的这些变化解释了香蒲domingensis 对人工湿地中普遍存在的条件的适应性，这使得这种植物成为优势物种，并使湿地能够保持高的污染物截留能力。
