摘要：Taro starch, cassava starch and also their modified were prepared as a backbone of grafted flocculants. These flocculants were synthesized by combining the properties of synthetic and natural polymer via the ‘grafting to’ method that separated into two stages. The first stage was synthesizing of non-terminated polyacrylamide (nt-PAM) and then followed by the second stage grafting of the nt-PAM onto several kinds of starch. The intrinsic viscosity (η) and average molecular weight (Mv) of starches-g-PAM were observed and their molecular structures were analyzed by using Fourier Transform Infra-Red (FTIR). Finally, the obtained flocculants were tested to evaluate their performance for the treatment of the simulated water turbidity containing 10 g of kaolin in 1000 ml of aquadest. The results showed that all the grafted flocculants can be good comparable to some commercial organic flocculants. The percentages of the water turbidity removal for each of backbones are 93.6% (taro starch), 91.2% (cassava starch), 95.3% (modified taro starch) and 94.1% (modified cassava starch). It can be highlighted that the modified taro starch exhibited the best performance in water turbidity removal up to 95%.
