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为了研究造纸废水中化学需氧量含量对芦苇(Phragmites australis)秆纤维形态的影响,于2015年4月28日~10月28日,以辽宁省双台河口湿地灌溉造纸废水的芦苇秆为实验材料,在芦苇的不同生长期,灌溉化学需氧量质量浓度为300 mg/L、175 mg/L和50 mg/L的造纸废水,芦苇成熟后,测定芦苇秆纤维的长度、宽度和长宽比。研究结果表明,成熟芦苇秆的纤维长度、宽度和长宽比随着水中化学需氧量含量的增加而增大。在芦苇的快速生长期灌溉化学需氧量质量浓度300 mg/L的废水,成熟芦苇秆的纤维长度、宽度和长宽比都达到最大值,分别为1.49 mm、10.35μm和143.96。造纸废水中的化学需氧量质量浓度(x)与成熟芦苇秆纤维长度(y_1)(r=0.414)、宽度(y_2)(r=0.340)和长宽比(y_3)(r=0.715)都线性正相关,其关系式分别为y_1=0.001x+0.845,y_2=0.006x+7.057和y_3=0.039x+118.508。
In order to study the effect of chemical oxygen demand (COD) on the fiber morphology of Phragmites australis culms in papermaking wastewater, from April 28 to October 28, 2015, the reed straw from papermaking wastewater was dumped in Shuangtaihe Wetland in Liaoning Province In the different growing periods of Phragmites australis, the papermaking wastewater with chemical oxygen demand of 300 mg / L, 175 mg / L and 50 mg / L was irrigated. After the Phragmites australis mature, the length, width and length of reed straw fiber ratio. The results show that the fiber length, width and aspect ratio of mature reed stalks increase with the increase of chemical oxygen demand in water. In the fast growing period of Phragmites aurea, the length, breadth and aspect ratio of mature reed stalks reached the maximum values of 1.49 mm, 10.35 μm and 143.96, respectively, when irrigated with COD of 300 mg / L. The chemical oxygen demand (COD) concentration in papermaking waste water and the fiber length (y_1) (r = 0.414), width (y_2) (r = 0.340) and aspect ratio (y_3) Linearly and linearly, the relations are y_1 = 0.001x + 0.845, y_2 = 0.006x + 7.057 and y_3 = 0.039x + 118.508, respectively.