Grafted flocculant based on the modified taro starch varied by length of polyacrylamide chain

2017 1st International Conference on Engineering and Applied Technology

Kaavessina, M.^1 ; Distantina, S.^1 ; Fadilah^1 ; Margono^1

Chemical Engineering Dept., Universitas Sebelas Maret, Surakarta

57126, Indonesia^1

关键词: Artificial wastewater;    Average molecular weight;    Combination properties;    Flocculation performance;    Fourier transform infra reds;    Mark-Houwink equations;    Polyacrylamide chains;    Simulated wastewater;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/403/1/012010/pdf
DOI  :  10.1088/1757-899X/403/1/012010

来源: IOP

【 摘 要 】

The grafted flocculant was prepared from modified taro starch as a backbone. This flocculant was utilizing the combination properties of the synthetic and natural polymer. Taro starch was enzymatic modified using α amylase before grafting. Non terminated polyacrylamide (nt-PAM) with different chain length was grafted gently into the starch in a nitrogen (N2) atmosphere. Further, this grafted flocculant was called starch-g-Pam. Mark Houwink equation was used to calculate the average molecular weight (Mv) of product that correlates directly with the intrinsic viscosity (η). Fourier Transform Infra-Red (FTIR) analysis was also carried out to depict its molecular structures. The flocculation performance test was evaluated to diminish the turbidity of the simulated wastewater (about 200 NTU). This artificial wastewater was created by dissolving kaolin in water (10 g of kaolin/1000 ml). The results explained that the grafted flocculant has good performance as well as some commercial organic flocculants. It can be highlighted that the longer chain of polyacrylamide, the better performance flocculation will be exhibited. Although fewer polyacrylamide is grafted into the backbone of the modified taro starch.