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Removal of low concentration methylene blue by anionic block magnetic coagulant |
ZHENG Huai-li1,2, YU Zhi-shuang1, ZHAO Rui1,2, LI Hong1, SUN Qiang1,2, HU Ya-dan1, JIANG Jun-yi1 |
1. Key Laboratory of the Three Gorges Reservoir Region's Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; 2. Chongqing Engineering Research Center of Water Treatment Coagulant, Chongqing 400045, China |
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Abstract Template anionic polyacrylamide (TAPAM) with anionic block structure was synthesized by template method, then modified with polydopamine (PDA) and grafted with Fe3O4 nanoparticles by chelation, named TAPAM-PDA-Fe3O4. Compared with PDA and APAM-Fe3O4 in the removal of methylene blue, the results illustrated that TAPAM-PDA-Fe3O4 showed the highest removal rate and the dominant effect of π-π stacking under neutral/alkaline conditions(7.03O4 could effectively remove methylene blue at low concentrations.When the initial concentration of methylene blue was 4mg/L and the pH value was 9, the maximum removal efficiency reached 97.5%.
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Received: 18 December 2020
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