Abstract
The efficient and safe flocculation of colored wastewaters from textile and leather industries is of great significance for natural environment and human health. In this work, an eco-friendly bamboo pulp cellulose grafting ployacrylamide (BPC-g-PAM) flocculant was synthesized and employed to remove organic dyes from dye solutions by flocculation. The flocculation performance of the synthesized BPC-g-PAM was evaluated by chroma and turbidity removals of a series of cationic and disperse dye solutions. A L9(34) orthogonal experiment was designed to optimize the flocculation process of the BPC-g-PAM. The positive results showed that, the BPC-g-PAM exhibited an excellent flocculation performance to organic dye solutions. The average decolorization rate reached 96.7 % and the chroma could be reduced to 5° or even lower for the disperse dye solutions. The mechanism of the BPC-g-PAM flocculation to disperse dyes was investigated and determined as chemical adsorption kinetics. Furthermore, the eco-friendly BPC-g-PAM also held an excellent biodegradability of 66.5 % at 45 d and 67.6 % at 90 d in soil extracting solution, which were far higher than the corresponding data of the commercial PAM.
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Yang, X., Chen, K., Zhang, Y. et al. Polyacrylamide grafted cellulose as an eco-friendly flocculant: Efficient removal of organic dye from aqueous solution. Fibers Polym 18, 1652–1659 (2017). https://doi.org/10.1007/s12221-017-1216-4
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DOI: https://doi.org/10.1007/s12221-017-1216-4