Calheiros Cristina S C, Silva Gabriela, Quitério Paula V B, Crispim Luís F C, Brix Hans, Moura Sandra C, Castro Paula M L
CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr António Bernardino de Almeida, Porto, Portugal.
Int J Phytoremediation. 2012 Aug;14(7):669-80. doi: 10.1080/15226514.2011.619233.
The toxicity of high salinity tannery wastewater produced after an activated sludge secondary treatment on the germination and seedling growth of Trifolium pratense, a species used as indicator in toxicity tests, was evaluated. Growth was inhibited by wastewater concentrations >25% and undiluted effluent caused a complete germination inhibition. Constructed wetlands (CWs) with Arundo donax or Sarcocornia fruticosa were envisaged to further polish this wastewater. Selection of plant species to use in CWs for industrial wastewater treatment is an important issue, since for a successful establishment they have to tolerate the often harsh wastewater composition. For that, the effects of this wastewater on the growth of Arundo and Sarcocornia were assessed in pot assays. Plants were subject to different wastewater contents (0/50/100%), and both were resilient to the imposed conditions. Arundo had higher growth rates and biomass than Sarcocornia and may therefore be the preferred species for use in CWs treating tannery wastewater. CWs planted with the above mentioned plants significantly decreased the toxicity of the wastewater, as effluent from the CWs outlet stimulated the growth of Trifolium at concentrations <50%, and seed germination and growth even occurred in undiluted effluent.
评估了活性污泥二级处理后产生的高盐度制革废水对用作毒性测试指示物种的红车轴草种子萌发和幼苗生长的毒性。废水浓度>25%时，红车轴草生长受到抑制，未稀释的废水完全抑制了种子萌发。设想采用种植芦竹或盐角草的人工湿地对该废水进行进一步净化。选择用于处理工业废水的人工湿地植物物种是一个重要问题，因为要成功构建人工湿地，植物必须耐受通常较为恶劣的废水成分。为此，通过盆栽试验评估了这种废水对芦竹和盐角草生长的影响。使植物接触不同含量的废水（0/50/100%），结果发现这两种植物对施加的条件都具有耐受性。芦竹的生长速率和生物量高于盐角草，因此可能是用于处理制革废水的人工湿地的首选植物物种。种植上述植物的人工湿地显著降低了废水的毒性，因为人工湿地出水口的流出物在浓度<50%时刺激了红车轴草的生长，甚至在未稀释的流出物中也出现了种子萌发和生长的情况。
