Fiber Morphology of Stalks of Mature Phragmites australis under Papermaking Wastewater Irrigation in Different Growth Periods
The purpose of the paper was study the effect of chemical oxygen demand of papermaking wastewater on the fiber morphology of stalks of mature Phragmites australis.The study was conducted from April 28 to October 28,2015.The stalks of Phragmites australis irrigated by papermaking wastewater in Shuangtaihekou wetlands in Liaoning province was took as experimental materials.In different growth periods,the concentrations of chemical oxygen demand of papermaking wastewater were 300 mg/L,175 mg/L and 50 mg/L.The length,width and the ratio of length and width of fiber of stalks of mature Phragmites australis were measured after Phragmites australis matured.The results showed that the length,width and the ratio of length and width of fiber of stalks of mature Phragmites australis increased with the concentrations of chemical oxygen demand increasing.In the rapid growth period,when the concentrations of chemical oxygen demand of papermaking wastewater was 300 mg/L,the length,width and the ratio of length and width of fiber of stalks of mature Phragmites australis were highest,which were 1.49 mm,10.35 μm and 143.96.The concentration of chemical oxygen demand (x) in wastewater has correlation with length (y1) (r=0.414),width (y2) (r=0.340) and the ratio of length and width (y3) (r=0.715) of fiber of stalks of Phragmites australis respectively.The regression equations were y1=0.001x+0.845,y2=0.006x+7.057,and y3=0.039x+l 18.508.
stalk of Phragmites australisfiber morphologypapermaking wastewaterchemical oxygen demandgrowth period
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NSTL
万方数据
维普
