摘要
利用木质素磺酸盐与丙烯酸(AA)、丙烯酰胺(AM)等单体的接枝共聚反应,直接对亚硫酸盐制浆废液(SSL)进行接枝改性。研究了SSL及不同接枝改性产物对沙土结构的影响,当施用剂量为0.2%时,用AA和AM接枝改性产物处理的沙土样品中干态稳定性团聚体(>0.25mm,COAs)含量分别提高到47.6%和45.9%,水稳定性团聚体含量分别提高到38.1%和39.9%。二元接枝改性产物中,AA/AM比率为20/80时产物的沙土改良效果最好。本文还将聚合物对土壤的作用机理进行了评述;提出干燥状态下阴离子基团与沙土颗粒的结合强于非离子基团的结合,聚合物与沙土之间的结合与粘接作用有关。
Spent sulfite liquor(SSL) from bagasse pulping was modified by graft copolymerization of acrylic acid(AA) and/or acrylamide(AM) onto lignosulfonate.Effects of SSL and different modified products upon sandy soil structure were studied.At the application rate of 0.2%,the dry contents of stable aggregates(>0.25 mm,COAs) in sandy soil samples treated with AA and AM modified products were 49.4% and 48.9%,and wet COAs were 38.1% and 39.9%,respectively.Among the products modified with both monomers,the product with AA/AM ratio of 20/80 had the best performance on improving structure of sandy soil.The acting mechanisms of polymer on soils were reviewed.It was suggested that,at dry status the bonding of anionic groups onto sand grains was stronger than that of nonionic groups,and there might be adhesion between polymers and sandy soils.
出处
《林产化学与工业》
EI
CAS
CSCD
2003年第3期1-5,共5页
Chemistry and Industry of Forest Products
基金
十五科技攻关"防沙治沙"项目经费资助(2002BA517A09 05)
