文档介绍：Treatment of low concentration cadmium-containing wastewater by modified starch
Zhang Yanlin Liu Peihong Zhang Qiuyun
School of Chemistry and Environment,
South China Normal University, GuangzhouˈChina
E-mail: ******@scnu.
Abstract the widely application. Current technologies lack a
The low concentration cadmium-containing wastewater is sufficiently high affinity and selectivity to reduce residual
generally difficult to dispose in industry and can cause cadmium to the levels dictated by ever more stringent
seriously side effect on the environment. The way of grafting government regulations [4] besides the high cost and the
acrylamide onto starch and then reacting with mercaptoacetic disposal problems. Therefore economical, practical and
acid was attempted to settle this problem. An investigation efficient techniques are required to purify low concentration
was mainly carried out to discuss the effect of St/AM (weight cadmium -containing wastewater.
ratio of starch to acrylamide) on grafting ratio and grafting The interest in the application of biomaterials technology
efficiency in graft copolymerization, and the thiol (SH) group for the removal of trace amounts of toxic metals from dilute
content of the final product. The high cadmium removal aqueous wastes is growing in recent years. Starch is more
percentage was achieved by using high graft