Laboratorio de Química Analítica Ambiental, Instituto de Química Aplicada del Litoral (IQAL, CONICET-UNL), Facultad de Ingeniería Química, Universidad Nacional del Litoral (UNL)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe Argentina, Argentina.
Int J Phytoremediation. 2022;24(1):66-75. doi: 10.1080/15226514.2021.1926909. Epub 2021 Jun 2.
Chromium (Cr), Nickel (Ni), and zinc (Zn) removal from landfill leachate using mesocosm-scale vertical flow wetlands, the effect of recirculation, and the ability of macrophytes to retain metals were evaluated. Wetlands were filled with coarse sand and light expanded clay aggregates and planted with or . Wetlands were operated using intermittent loading, with and without recirculation. Raw leachate was diluted and spiked with metals to reach the following concentrations: 0.2mg L Cr , 0.2mg L Ni, and0.2mg L Zn and 1.0mg L Cr, 1.0mg L Ni, and 1.0mg L Zn. Wetlands planted with presented higher metal removal than those planted with . Recirculation enhanced metal removal efficiencies significantly, being for /: 60/54, 49/47, 61/47% for Cr, Ni, and Zn at 0.2mg L, and 80/71, 76/62, 73/59% for Cr, Ni, and Zn at 1.0mg L, respectively. Metals were efficiently retained by macrophytes. Plant biomass and metal concentrations in roots were significantly higher than in shoots. Scanning electron microscopy and X-ray microanalysis showed that metals were absorbed by internal root tissues. A hybrid wetland planted with may be implemented to improve not only metal but also chemical oxygen demand and total nitrogen removals.
采用中观尺度垂直流湿地去除垃圾渗滤液中的铬（Cr）、镍（Ni）和锌（Zn），研究了循环利用的效果以及大型植物对金属的截留能力。湿地用粗砂和轻质膨胀粘土骨料填充，并种植 或 。湿地采用间歇式加载方式运行，有或没有循环利用。原渗滤液经过稀释并添加金属，达到以下浓度：0.2mg L Cr、0.2mg L Ni 和 0.2mg L Zn，以及 1.0mg L Cr、1.0mg L Ni 和 1.0mg L Zn。种植 的湿地比种植 的湿地具有更高的金属去除率。循环利用显著提高了金属去除效率，在 0.2mg L 时分别为 60/54、49/47 和 61/47%，在 1.0mg L 时分别为 80/71、76/62 和 73/59%。金属被大型植物有效地截留。植物生物量和根中的金属浓度明显高于茎。扫描电子显微镜和 X 射线微分析表明，金属被内部根系组织吸收。种植 的混合湿地可能会被实施，以提高金属以及化学需氧量和总氮的去除率。
