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为了研究芦苇(Phragmites australis)根茎和根对造纸废水中铜的吸收能力,于2015年4月20日~10月22日,以辽河口湿地灌溉造纸废水的芦苇根茎和根为研究对象,在芦苇不同生长期,分别灌溉化学需氧量质量浓度为50 mg/L、175 mg/L和300 mg/L的造纸废水,测定芦苇根茎和根的生物量,以及重金属铜的含量。结果表明,在芦苇各个生长时期,灌溉不同浓度造纸废水后,芦苇根茎的生物量都高于根,当废水中化学需氧量质量浓度为175 mg/L时,根茎与根的生物量差异最显著;根中单位质量铜含量和总铜含量都高于根茎;当废水中化学需氧量质量浓度为175 mg/L时,芦苇根中的单位质量铜含量在快速生长期最大,为104.03 mg/kg,芦苇根茎中的铜含量在成熟期最大,为152.32 kg/km~2。
In order to study the ability of rhizome and root of Phragmites australis to absorb copper in papermaking wastewater, from April 20 to October 22, 2015, rhizomes and roots of reed from irrigation and papermaking wastewater in Liaohekou Wetland were studied. At different growth stages, the papermaking wastewater with chemical oxygen demand concentrations of 50 mg / L, 175 mg / L and 300 mg / L were respectively irrigated to determine the biomass of rhizomes and roots and the content of heavy metal copper. The results showed that the biomass of rhizomes was higher than that of roots when different concentrations of papermaking wastewater were irrigated at different growth stages of reed. When the chemical oxygen demand of wastewater was 175 mg / L, the biomass of rhizome and root was the most The content of copper per unit mass and the total copper content in roots were higher than those in rhizomes. When COD in wastewater was 175 mg / L, the content of Cu per unit mass in reed roots was the highest at 104.03 mg / kg, the content of copper in the rhizome of reed was the highest at maturity, which was 152.32 kg / km ~ 2.