Synthesis and application of lignin-based copolymer LSAA on controllingnon-point source pollution resulted from surface runoff
LIU Chen , WU Guangxia , MU Huanzhen , YUAN Zonghuan , TANG Lianyi , LIN Xiangwei
DOI:
Received July 19, 2007,Revised January 23, 2008, Accepted , Available online
Volume 20,2008,Pages 820-826
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In this article, alkali lignin separated from paper pulp waste was grafted into a novel copolymer LSAA (a copolymer of lignin, starch,
acrylamide, and acrylic acid). Its practical application e ect and environmental safety were studied. The results of field simulation
experiment indicated that the application of LSAA significantly a ected the output of the runo and pollutants. The runo quantity
was decreased by 16.67%–47.00% and the loads of total suspended solids (TSS), chemical oxygen demand (COD), total nitrogen (TN),
and total phosphorus (TP) were reduced by 17.78%–62.14%, 26.32%–59.91%, 15.25%–47.42%, and 22.18%–52.78%, respectively.
The tests on its environmental safety showed that LSAA did no harm the soil. Compared with polyacrylamide (PAM), a dominant
product in this field, LSAA exhibited similar e ects and cheap cost. Thus, this study not only created a new product for controlling
runo water quality but also o ered a beneficial application for industrial paper waste.
