造纸废水对湿地芦苇纤维素含量的影响

Influence of papermaking wastewater on the cellulose content of reed

芦苇(Phragmites australis)是较好的造纸材料,其纤维素含量高低直接影响造纸的价值,纤维素越高,制浆、漂白工艺越简单,成纸紧度、透明度越高。为研究造纸废水灌溉对芦苇纤维素含量的作用效果,以灌溉造纸废水的芦苇茎和叶为试验对象,测定不同灌溉期和不同浓度废水下芦苇茎和叶的纤维素含量。结果表明,1)灌溉300mg·L-1浓度废水对芦苇纤维素含量影响最大,出苗期芦苇茎纤维素含量表现为:300mg·L-1(36.39%)>175mg·L-1(35.39%)>50mg·L-1(34.73%)>0(33.45%);2)在快速生长期灌溉废水最利于芦苇纤维素的积累,如浓度为300mg·L-1时芦苇茎纤维素含量变化量表现为快速生长期(11.75%)>抽穗期(9.64%)>成熟期(9.6%)>展叶期(7.68%)>出苗期(3.64%);3)芦苇纤维素含量总体表现为茎>叶,如在出苗期灌溉浓度为300mg·L-1的废水,芦苇纤维素含量表现为茎(33.45%)>叶(22.11%);4)废水浓度(X)对芦苇纤维素含量(Y)有显著影响(P<0.05),二者的回归方程分别为Y茎=0.012 X+0.379 8,Y叶=0.008 X+0.249 2。

Reed is a kind of better material for papermaking, in which the cellulose content directly affects the value of paper making,and the higher cellulose content is beneficial to the pulping, bleaching, and making the tightness and the transparency paper. A experiment was conducted to test the effect of different irrigation time and wastewater concentration （mg·L^-1） of papermaking wastewater on the cellulose content in reed The resuits showed the cellulose content in reed stems and leaves was the highest when the concentration of wastewater irrigation was 300 mg·L^-1 , indicating that the cellulose content in reed stems of the germination period was 36.39%（300 mg ·L^-1）〉35.39%（175 mg ·L^-1）〉34.73% （50 mg·L^-1）〉33.45%（CK）.The irrigation wastewater was the most beneficial to cellulose accumulation of reed when reed was during the fast growing period,for example, and the change quantity of the cellulose content in reed stems was 11.75% （rapid growth period） 〉 9.64% （heading） 〉9.6% （maturity） 〉 7.68% （the leaf expansion period）〉 3.64%（ger- mination） when the wastewater concentration was 300 mg ·L^-1. The cellulose content in reed stems was higher than that in leaves, and they were 33.45% in stem and 22.11% in leaves when the wastewater concentration was 300 mg ·L^-1in the germination period. The concentration（X） had the significant effect on the cellulose content of reed（Y）,which would be described as equation：Y=0.01X＋31.261%.