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. 2019 Apr 23;9(4):649. doi: 10.3390/nano9040649

Figure 11.

Figure 11

(a) Effect of pH on MB adsorption over the Fe3O4@1 (initial solutions, 15 mg L−1; temperature, 298 K). (b) Adsorption activity comparison of blank, Fe3O4, 1, Fe3O4 and 1, Fe3O4@1.